JP2020176485A - Waterproof repair method for concrete floor slab - Google Patents

Abstract

To provide a waterproof repair method for a concrete floor slab that can reliably exhibit a waterproof function by substantially smoothing an uneven layer surface of a first waterproof layer with an impregnated waterproof powder-liquid agent.SOLUTION: The waterproof repair method for the concrete floor slab includes: a pavement removal step of removing an existing pavement Y from a concrete floor slab; an impregnated waterproofing liquid agent application step of applying an impregnated waterproofing liquid agent containing an epoxy resin to an uneven surface of the floor slab to form a first waterproofing layer on an uneven layer surface; an impregnated waterproofing powder-liquid application step of applying an impregnated waterproofing powder-liquid agent that is a mixture of a liquid component containing an epoxy resin and a powder component to the uneven layer surface of the first waterproofing layer to form a second waterproof layer that makes the uneven layer surface substantially smooth; a coating film waterproofing agent application step of applying an asphalt coating film waterproofing agent to a layer surface of the second waterproofing layer to form a coating film waterproofing layer; a silica sand spraying step of spraying silica sand on the coating film waterproofing layer to form a silica sand layer; and a paving step of depositing an asphalt compound on the silica sand layer to form an asphalt pavement layer.SELECTED DRAWING: Figure 7

Description

The present invention relates to a method for repairing waterproofing of a concrete slab by removing the existing pavement including the pavement layer of the concrete slab and repairing the waterproof structure of the concrete slab.

Generally, the waterproof structure of a concrete floor slab is repaired for reasons such as aging and aging. To repair the waterproof structure, the existing pavement is cut, and the cut existing pavement is removed from the concrete slab to construct a new waterproof structure on the concrete slab.
In the repair of the waterproof structure, the surface of the concrete floor slab may be damaged when cutting the existing pavement. The floor slab surface of the concrete floor slab is formed into an uneven shape including concave portions and convex portions by cutting, and becomes a non-land surface.

As a waterproof structure for concrete slabs, Patent Document 1 discloses a waterproof structure for concrete slabs for road bridges. In Patent Document 1, the epoxy resin adhesive of a permeable waterproof material is applied to the surface of the floor slab of the concrete floor slab to allow the epoxy resin adhesive to permeate into the concrete floor slab to penetrate the concrete floor. An epoxy resin adhesive-containing portion impregnated with an epoxy resin adhesive is formed inside the plate.
In Patent Document 1, an asphalt waterproof material is applied to an epoxy resin adhesive (epoxy resin adhesive layer) on the surface of a floor slab to form an asphalt coating film, silica sand is sprayed on the asphalt coating film, and silica sand is applied onto the asphalt coating film. Asphalt pavement is applied to build a waterproof structure on the concrete slab.

In Patent Document 1, when the epoxy resin of the permeable waterproof material is applied to the non-land slab plane (concave and convex floor slab surface), the film thickness of the convex portion of the floor slab plane becomes thin, and the floor slab surface It collects in the recess.
When the asphalt pavement is constructed, the convex portion having a thin film thickness of the epoxy resin adhesive may be damaged by the heat of the asphalt compound and the influence of the aggregate.
After the asphalt pavement is constructed, the convex portion having a thin film thickness of the epoxy resin adhesive may be damaged due to the continuous generation of shearing force due to the load of the vehicle traveling on the asphalt pavement.
The thin convex portion of the epoxy resin adhesive may cause poor adhesion to the asphalt waterproof material (asphalt coating film).

As described above, in Patent Document 1, even if the epoxy resin of the permeable waterproof material is applied to the uneven floor slab surface (concave and convex floor slab surface), the epoxy resin may be damaged. It is not possible to build a waterproof structure that reliably demonstrates the waterproof function.

Japanese Unexamined Patent Publication No. 2008-57119

The present invention provides a waterproof repair method for a concrete floor slab that can reliably exert a waterproof function by substantially smoothing the uneven layer surface (concave-shaped floor slab surface) of the first waterproof layer with an impregnated waterproof powder solution. To do.

The first aspect of the present invention includes an existing pavement removing step of cutting an existing pavement including a pavement layer laminated on the floor slab surface of a concrete floor slab and removing the existing pavement from the floor slab surface, and the existing pavement. An impregnated waterproof liquid containing an epoxy resin is applied and impregnated on the surface of the floor slab formed into an uneven shape including concave portions and convex portions by cutting the existing pavement in the removing step, and the uneven shape of the floor slab surface is coated. An impregnated waterproofing liquid application step of covering with the impregnated waterproofing liquid to form a first waterproofing layer having an uneven layer surface, and a liquid component and a powder component containing an epoxy resin on the uneven layer surface of the first waterproofing layer. The impregnated waterproof powder coating step of applying the mixed impregnated waterproof powder and coating the surface of the uneven layer with the impregnated waterproof powder to form a second waterproof layer that substantially smoothes the surface of the uneven layer, and the above. A step of applying an asphalt coating waterproofing agent to a substantially smooth layer surface of the second waterproofing layer to form a coating coating waterproofing layer covering the second waterproofing layer, and a layer surface of the coating film waterproofing layer. A silica sand spraying step of spraying silica sand on the surface to form a silica sand layer covering the coating waterproof layer, and a pavement step of laminating asphalt on the surface of the silica sand layer to form an asphalt pavement layer covering the silica sand layer. It is a waterproof repair method for concrete pavement slabs, which is characterized by including.

According to the second aspect of the present invention, the impregnated waterproof liquid agent and the liquid component of the impregnated waterproof powder liquid agent contain the same main agent epoxy resin and the same curing agent, and the impregnated waterproof powder liquid agent. The waterproof repair method for a concrete floor slab according to claim 1, wherein the powder component contains a cement-based powder, an aggregate, and an admixture.

According to claim 3 of the present invention, the impregnated waterproof liquid agent and the liquid component of the impregnated waterproof powder liquid agent contain a main agent: bisphenol A type epoxy resin and a curing agent: aliphatic polyamine. The waterproof repair method for a concrete floor slab according to claim 2, which is characterized by this.

A fourth aspect of the present invention is characterized in that the impregnated waterproof liquid agent and the liquid component of the impregnated waterproof powder liquid agent have a weight ratio of a main agent and a curing agent of 1: 1. The method for waterproofing and repairing a concrete floor slab according to claim 2 or 3.

According to the fifth aspect of the present invention, the powder component of the impregnated waterproof powder liquid agent is cement-based powder: early-strength Portland cement, aggregate: aluminum silicate-based special aggregate, admixture: fly ash, and calcium sulfate. The method for waterproofing and repairing a concrete floor slab according to any one of claims 2 to 4, wherein the concrete floor slab is made of.

According to claim 6, the powder component of the impregnated waterproof powder liquid agent is a weight ratio of early-strength Portland cement, aluminum silicate-based special aggregate, fly ash and calcium sulfate, and early-strength Portland cement: Kay. The method for waterproofing and repairing a concrete floor slab according to claim 5, wherein the special aggregate based on aluminum acid: fly ash: calcium sulfate = 0.595: 1.000: 0.120: 0.255. ..

According to claim 7, the impregnated waterproof liquid agent contains a main agent: bisphenol A type epoxy resin and a curing agent: aliphatic polyamine, and the weight ratio of the main agent and the curing agent is set as the main agent: curing agent =. The impregnated waterproof powder solution is 1: 1 and contains a main agent: bisphenol A type epoxy resin and a curing agent: aliphatic polyamine, and the weight ratio of the main agent and the curing agent is set to the main agent: curing agent = 1: 1. The liquid component to be set to 1 and cement-based powder: early-strength Portland cement, aggregate: aluminum silicate-based special aggregate, admixture: fly ash, and calcium sulfate are contained, and early-strength Portland cement, silicic acid. Weight ratio of aluminum special aggregate, fly ash and calcium sulfate, early strength Portorand cement: aluminum silicate Special aggregate: fly ash: calcium sulfate = 0.595: 1.000: 0.120: 0.255 By cutting the existing pavement in the existing pavement removing step, the floor slab plane is formed into a concavo-convex shape having a depth of the recess: more than 0.0 mm and 5.0 mm or less. In the step of applying the impregnated waterproof liquid agent, the depth of the recess is applied to the floor slab plane formed in an uneven shape of more than 0.0 mm and 6.0 mm or less at a coating amount of 0.25 kg / m ^2. The first waterproof layer having the surface of the uneven layer is formed, and in the step of applying the impregnated waterproof powder, the impregnated waterproof powder is applied to the surface of the uneven layer of the first waterproof layer in an amount of 1.0 kg / kg /. coated by m ^2, and a waterproof repair method of the concrete slab according to claim 1, characterized in that forming said second waterproof layer made substantially smooth in the uneven layer surface.

According to the present invention, an impregnated waterproofing liquid containing an epoxy resin is applied to the uneven floor slab surface (non-landing floor slab plane) to form a first waterproof layer on the uneven layer surface on the floor slab surface. By applying an impregnated waterproof powder liquid agent containing a liquid component containing an epoxy resin and a powder component to the uneven layer surface (concave-shaped floor slab surface) of the first waterproof layer, the unevenness of the first waterproof layer is applied. The layer surface (concave and convex floor slab plane) can be made substantially smooth.
Thereby, in the present invention, a film composed of an impregnated waterproof liquid agent, an impregnated waterproof powder liquid agent and an asphalt coating film waterproofing agent (first waterproof layer, second waterproof layer and coating film waterproof layer) in the concave and convex portions on the surface of the floor slab. The thickness can be homogenized to improve the adhesive strength and shear strength.
As described above, in the present invention, by improving the adhesive strength and shear strength of the first and second waterproof layers and the coating film waterproof layer, the heat of the asphalt compound and the first and second waterproof layers and the coating film due to the aggregate are used. Damage to the waterproof layer can be suppressed, and damage to the first and second waterproof layers and the coating waterproof layer can be suppressed even if the shearing force of the vehicle load traveling on the asphalt pavement is continuously received. It is possible to construct a waterproof structure for a concrete floor slab that exhibits a waterproof function.

It is a figure for demonstrating the waterproof repair method of a concrete floor slab. It is a schematic diagram which shows the concrete floor slab and the existing pavement (waterproof layer, coating film waterproof layer, silica sand layer, pavement layer) in the existing pavement removal step (ST1). (A) is a schematic view of removing the existing pavement from the floor slab surface of the concrete floor slab in the existing pavement removing step (ST1), and (b) is a partially enlarged view of FIG. 3 (a). (A) is a schematic view in which the impregnated waterproof liquid agent (epoxy resin and curing agent liquid agent) is applied to the surface of the uneven floor slab in the impregnated waterproof liquid agent application step (ST2) to form the first waterproof layer. b) is a partially enlarged view of FIG. 4 (a). In (a), in the impregnated waterproof powder liquid agent application step (ST4), the impregnated waterproof powder liquid agent (powder-liquid mixture of liquid component and powder component) is applied to the surface of the uneven layer of the first waterproof layer to perform the first waterproofing. Concavo-convex layer of the layer A schematic view of forming a second waterproof layer that substantially smoothes the surface of the concavo-convex layer (concave shape / concave and convex portions of the floor slab plane), (b) is a partially enlarged view of FIG. 5 (a). .. (A) is a schematic view in which an asphalt coating film waterproofing agent is applied to a substantially smooth layer surface (layer surface) of the second waterproofing layer to form a coating film waterproofing layer in the coating film waterproofing liquid application step (ST6). (B) is a partially enlarged view of FIG. 6 (a). In the silica sand spraying step (ST7) and the pavement step (ST8), silica sand is sprayed on the layer surface (substantially smooth layer surface) of the coating film waterproof layer to form a silica sand layer, and the asphalt compound on the layer surface of the silica sand layer is laminated. It is the schematic which formed the asphalt pavement layer. (A) is a perspective view showing a concrete flat plate, and (b) is a perspective view showing a concrete flat plate on the surface of an uneven plate. (A) is a schematic view showing the waterproof structures of Examples 1, 2, 2, 5 and 6 of each test, and (b) is Example 3-1 and Example 3- of the film thickness test. 2 and a schematic view showing the waterproof structure of Example 4, (c) is a schematic view showing the concrete flat plates of Comparative Example 1-1, Comparative Example 1-2 and Comparative Example 2 of the film thickness test, (d) is It is the schematic which shows the waterproof structure of the comparative example 3 and the comparative example 4 of each test. It is a perspective view which shows the relationship between a CT meter and each concrete flat plate in a film thickness test. It is a top view which shows each section to measure with a CT meter in a film thickness test (measurement by a CT meter). It is a figure which shows the relationship between MPD and a regression curve in a CT meter in a film thickness test (measurement by a CT meter). It is a perspective view which shows the relationship between a digital film thickness meter and a concrete flat plate in a film thickness test (measurement by a digital film thickness meter). It is a graph which shows the distribution of the displacement data of Example 1, Example 3-1 and Comparative Example 1-1 and Comparative Example 3 in the film thickness test, and the standard deviation of the displacement data. It is a graph which shows the relationship between the MPD of each Example and each comparative example, and the standard deviation of displacement data in a film thickness test. It is a graph which shows the distribution of MPD of Example 3-1 and Comparative Example 3 in the film thickness test. It is a graph which shows the distribution of the displacement data of Example 3-1 and Comparative Example 1-1, and the standard deviation of the displacement data in the film thickness test. It is a graph which shows the film thickness distribution of the concave part and the convex part of Example 3-1 and Comparative Example 1-1, and the standard deviation of the film thickness in the film thickness test. It is a graph which shows the average value of the tensile adhesive strength of each Example and each comparative example in a tensile adhesion test. It is a graph which shows the average value of the shear surface strength of each Example and each comparative example in a shear test. It is a graph which shows the average value of the adhesive strength of each Example and each comparative example in the Kenken type adhesive strength test (environment of temperature 23 degreeC). It is a graph which shows the average value of the adhesive strength of each Example and each comparative example in the Kenken type adhesive strength test (environment of temperature 5 degreeC). It is a graph which shows the relationship between MPD of each test, standard deviation σ of displacement data, tensile adhesive strength and adhesive strength in Example 1, Example 2, Comparative Example 3 and Comparative Example 4. It is a graph which shows the relationship between the standard deviation σ of the displacement data and the tensile adhesive strength in Example 1, Example 2, Comparative Example 3 and Comparative Example 4. It is a graph which shows the relationship between the standard deviation σ of the displacement data and the adhesive strength in Example 1, Example 2, Comparative Example 3 and Comparative Example 4.

The waterproof repair method for the concrete floor slab according to the present invention will be described with reference to FIGS. 1 to 25.

In FIGS. 1 to 7, the waterproof repair method for the concrete floor slab is as follows: an existing pavement removal step (ST1), an impregnated waterproof liquid application step (ST2), an impregnated waterproof liquid drying step (ST3), and an impregnated waterproof powder coating. It includes a step (ST4), an impregnated waterproof powder drying step (ST5), a coating film waterproofing liquid coating step (ST6), a silica sand spraying step (ST7), and a pavement step (ST8).

<1> Existing pavement removal process (ST1)
In the existing pavement removal step (ST1), as shown in FIGS. 2 and 3, the existing pavement Y including the pavement layer OA laminated on the floor slab surface XA of the concrete floor slab X is cut, and the existing pavement Y is floored. Remove from plate surface XA.
The concrete slab X is a reinforced concrete slab (RC slab) for a road bridge.
As shown in FIG. 2, the existing pavement Y includes an existing waterproof layer OW, an existing coating film waterproof layer OF, an existing silica sand layer OS, and an existing pavement layer OA (asphalt pavement) on the floor slab surface XA of the concrete floor slab X. Layer) and the like are included.

In the existing pavement removal step (ST1), the existing pavement Y is cut with a cutting machine, and the existing pavement Y (waterproof layer OW, coating film waterproof layer OF, silica sand layer OS, pavement layer OA, etc.) is used with a back hoe, water jet, shot plast, etc. ) Is removed to expose the concrete pavement X.

As shown in FIG. 3, the floor slab surface of the concrete floor slab X is scraped by cutting the existing pavement Y with a cutting machine, and the uneven shape J (concave and convex surface shape) including a large number of concave portions Q and a large number of convex portions P. (Hereinafter, referred to as "floor slab surface XB having uneven shape J").
On the floor slab surface XB of the uneven shape J, each concave portion Q and each convex portion P are continuously formed as shown in FIG.
The depth d (concave depth) of each recess Q is uneven, and is formed, for example, to be more than 0.0 mm and 5.0 mm or less. The depth d of each concave portion Q is the depth (interval / distance) between the apex of each convex portion P and the concave bottom of each concave portion Q.
In the existing pavement removing step (ST1), for example, after removing the existing pavement (after cutting), the floor slab surface XB of the uneven shape J is washed with water while rubbing with a brush to cut from the floor slab surface XB of the uneven shape J. Remove the residue (dust of concrete powder, etc.).

<2> Impregnated waterproof liquid agent application process (ST2)
As shown in FIG. 4, the impregnation waterproof liquid agent application step (ST2) is formed into a concave-convex shape J including a large number of concave portions Q and a large number of convex portions P by cutting the existing pavement Y in the existing pavement removing step (ST1). A first waterproof layer having an uneven layer surface La by applying an impregnated waterproof liquid E1 containing an epoxy resin to the floor slab surface XB and covering the floor slab surface XB having an uneven shape J with the impregnated waterproof liquid E1. Form LA.

The impregnated waterproof liquid agent E1 is a waterproof liquid agent containing an epoxy resin. The impregnated waterproof liquid agent E1 is a two-component waterproof liquid agent (two-component type epoxy resin / room temperature curing type epoxy resin), and contains a main agent epoxy resin (water-based epoxy resin) and a curing agent.

The epoxy resin as the main component of the impregnated waterproof liquid agent E1 is, for example, a bisphenol A type epoxy resin, a bisphenol F type epoxy resin, a polyglycol type epoxy resin, a novolac type epoxy resin, a glycidial aluminum type epoxy resin, or the like.
A bisphenol A type epoxy resin is used as the main agent epoxy resin.

The curing agent of the impregnated waterproof liquid agent E1 is, for example, an amine compound that reacts with an epoxy resin (main agent) to form a cured product at room temperature, and an aliphatic polyamine is used.

The aliphatic polyamine of the curing agent of the impregnated waterproof liquid agent E1 is, for example, diethylenetriamine, triethylenetetramine, tetraethylenepentamine and the like.

In the impregnated waterproof liquid agent E1, for example, the weight ratio of the main agent (bisphenol A type epoxy resin) and the curing agent (aliphatic polyamine) is set to the main agent: curing agent = 1: 1 and the main agent (bisphenol A type epoxy resin) and the curing agent. It is a liquid preparation obtained by mixing (aliphatic polyamine).
As described above, the impregnated waterproof liquid agent E1 is obtained by mixing, for example, a main agent: bisphenol A type epoxy resin and a curing agent: aliphatic polyamine in a weight ratio of 1: 1.

In the impregnation waterproof liquid agent application step (ST2), the impregnation waterproof liquid agent E1 is applied to the floor slab surface XB (each concave portion Q and each convex portion P) having an uneven shape J, as shown in FIG.
The impregnated waterproof liquid agent E1 is applied by spraying using a spraying device or by hand using a roller, a roller brush, a rubber rake, or the like, and is applied to the floor slab flat surface XB having an uneven shape J.

In the impregnation waterproof liquid agent application step (ST2), the impregnation waterproof liquid agent E1 is applied to, for example, the floor slab plane XB formed in the uneven shape J having a depth D of each recess Q exceeding 0.0 mm and 5.0 mm or less. Amount: Apply at 0.25 kg / m ² .
As a result, as shown in FIG. 4, the impregnated waterproof liquid agent E1 covers each concave portion Q and each convex portion P (concavo-convex shape J) of the floor slab surface XB formed in the concave-convex shape J to cover the uneven layer surface La. The first waterproof layer LA to have is formed. The impregnating waterproof liquid agent E1 follows the shape of each concave portion Q and each convex portion P (concave and convex shape J), and each concave portion Q and each convex portion P (convex shape J) of the floor slab surface XB formed in the concave and convex shape J. The first waterproof layer LA and the uneven layer surface La of the first waterproof layer LA are formed by covering the first waterproof layer LA.
As shown in FIG. 4B, the impregnated waterproof liquid agent E1 permeates (impregnates) cracks or the like (cracks or the like) generated in the concrete floor slab X from the floor slab surface XB having the uneven shape J.

<3> Impregnated waterproof liquid agent drying step (ST3)
In the impregnated waterproof liquid agent drying step (ST3), the impregnated waterproof liquid agent E1 (first waterproof layer LA) coated and impregnated on the floor slab surface XB having the uneven shape J is dried and cured.
The impregnated waterproof liquid agent E1 applied to the floor slab surface XB having the uneven shape J is cured at room temperature by reacting the main agent epoxy resin (bisphenol A type epoxy resin) with the curing agent (aliphatic polyamine).
The drying time of the impregnated waterproof liquid agent E1 is 30 minutes to 1 hour at an outside air temperature of 5 ° C. to 30 ° C.
In the impregnation waterproofing liquid application step (ST2), the first waterproof layer LA (impregnated waterproofing liquid E1) may be heated to dry and harden.

<4> Impregnated waterproof powder coating process (ST4)
In the impregnated waterproof powder coating step (ST4), as shown in FIG. 5, the impregnated waterproof powder E2 is obtained by mixing a liquid component containing an epoxy resin and a powder component on the surface La of the uneven layer of the first waterproof layer LA. A second waterproof layer that is applied and covers the surface La of the concavo-convex layer to substantially smooth the surface La of the concavo-convex layer of the first waterproof layer LA (each concave portion Q and each convex portion P of the floor slab surface XB having the concave-convex shape J). Form LB.

The impregnated waterproof powder solution E2 is a powder solution mixture in which a liquid component containing an epoxy resin (water-based epoxy resin) and a powder component are mixed.

The liquid component of the impregnated waterproof powder E2 is a two-component waterproof agent (two-component epoxy resin / room temperature curable epoxy resin), and the epoxy resin having the same main agent as the impregnated waterproof liquid E1 and the impregnated waterproof liquid E1. Contains the same hardener.
The epoxy resin as the main agent of the liquid component is, for example, a bisphenol A type epoxy resin having the same main agent as the impregnated waterproof liquid agent E1.
The curing agent of the liquid component is, for example, an aliphatic polyamine having the same curing agent as the impregnated waterproof liquid agent E1.

The powder component of the impregnated waterproof powder liquid agent E2 contains a cement-based powder, an aggregate, and an admixture.

The cement-based powder of the powder component is Portland cement, mixed cement, special cement, ordinary cement, quick-hardening cement and the like.

Examples of Portland cement include early-strength Portland cement, ordinary Portland cement, ultra-early-strength Portland cement, moderate heat Portland cement, low heat Portland cement, and sulfate-resistant Portland cement.
Examples of the mixed cement include blast furnace cement (A type, B type, C type), fly ash cement (A type, B type, C type), silica cement (A type, B type, C type) and the like.
Special cements include Portland cement with various properties added, such as expandable cement, low heat generation cement, white Portland cement, alumina cement, fine particle cement, and special fine particle cement.
As the concrete-based powder of the powder component, for example, early-strength Portland cement is used.

As the aggregate of the powder component, a special aggregate based on aluminum silicate is used.

The admixture of the powder component is fly ash, a fast-curing admixture, or the like. Examples of the fast-curing admixture include calcium sulfate.
As the admixture for the powder component, for example, fly ash and calcium sulfate (quick-hard admixture) are used.

In the impregnated waterproof powder E2, the liquid component is, for example, the weight ratio of the main agent (bisphenol A type epoxy resin) and the curing agent (aliphatic polyamine), as in the impregnated waterproof liquid E1, the main agent: curing agent = 1: 1. It is a liquid agent obtained by mixing a main agent (bisphenol A type epoxy resin) and a curing agent (aliphatic polyamine).
In the impregnated waterproof powder E2, the powder component is, for example, the weight ratio of cement-based powder (early-strength Portland cement), aggregate (aluminum silicate-based special aggregate), fly ash, and calcium sulfate, and cement-based (early) cement-based (early). Strong Portland cement): Aggregate (aluminum silicate aggregate): Fly ash: Calcium sulfate = 0.059: 1.000: 0.120: 0.255, early strong Portland cement, aluminum silicate aggregate , Fly ash and calcium sulfate are mixed powders.
As described above, the impregnated waterproof powder E2 is obtained by mixing bisphenol A type epoxy resin, aliphatic polyamine, early-strength Portland cement, aluminum silicate-based special aggregate, fly ash and calcium sulfate.

In the impregnated waterproof powder liquid agent coating step (ST4), the impregnated waterproof powder liquid agent E2 is applied to the uneven layer surface La of the first waterproof layer LA (impregnated waterproof liquid agent E1) as shown in FIG.
The impregnated waterproof powder E2 is applied by spraying using a spraying device or by hand using a roller, a roller brush, a rubber rake, etc., and the uneven layer surface La of the first waterproof layer LA (floor having an uneven shape J). It is applied to the uneven shape J) of the plate surface XB.

In the impregnated waterproof powder liquid agent application step (ST4), the impregnated waterproof powder liquid agent E2 is applied to, for example, the floor slab surface XB formed in the uneven shape J having a depth D of each recess Q exceeding 0.0 mm and 5.0 mm or less. , Coating amount: 1.0 kg / m ^{2 is} applied.
As a result, as shown in FIG. 5, the impregnated waterproof powder liquid agent E2 covers the uneven layer surface La of the first waterproof layer LA (each concave portion Q and each convex portion P of the floor slab surface XB having the uneven shape J). A second waterproof layer LB that makes the surface La of the uneven layer substantially smooth (or smooth) is formed. As shown in FIG. 5B, the layer surface of the second waterproof layer LB is a substantially smooth layer surface (hereinafter, also referred to as “substantially smooth layer surface Lb”).

<5> Impregnated waterproof powder drying process (ST5)
In the impregnated waterproof powder liquid drying step (ST5), the impregnated waterproof powder liquid E2 applied to the uneven surface La of the first waterproof layer LA is dried and cured.
The impregnated waterproof powder liquid E2 applied to the surface La of the uneven layer of the first waterproof layer LA is cured at room temperature by reacting the main agent epoxy resin (bisphenol A type epoxy resin) with the curing agent (aliphatic polyamine). ..
The drying time of the impregnated waterproof powder E2 is 1 hour to 2 hours at an outside air temperature of 5 ° C. to 30 ° C.
In the impregnated waterproof powder liquid drying step (ST5), the second waterproof layer LB (impregnated waterproof powder liquid E2) may be heated to dry and harden.

<6> Coating film waterproofing agent application process (ST6)
In the coating film waterproofing agent application step (ST6), as shown in FIG. 6, the asphalt coating film waterproofing agent E3 is applied to the substantially smooth layer surface Lb (layer surface) of the second waterproofing layer LB, and the second waterproofing layer LB is applied. A coating film waterproof layer LC is formed.
The asphalt coating film waterproofing agent E3 is, for example, asphalt, rubber, a polymer elastomer, or the like. As the asphalt coating film waterproofing agent E3, for example, the product "Tough Seal (registered trademark)" of Toa Road Corporation or the product "Fresh Coat" of Nichireki Co., Ltd. is used.

In the coating film waterproofing agent coating step (ST6), the asphalt coating film waterproofing agent E3 is applied, for example, to the substantially smooth layer surface Lb of the second waterproofing layer LB at a coating amount of 1.2 kg / m ² .
In the coating film waterproofing agent application step (ST6), asphalt coating film waterproofing agent E3 has a substantially uniform layer thickness (film) on the substantially smooth layer surface Lb (layer surface) of the second waterproof layer LB, as shown in FIG. (Thickness) is applied, and a coating film waterproof layer LC is formed on the substantially smooth layer surface Lb.
As a result, the layer surface Lc of the coating film waterproof layer LC (asphalt coating film waterproofing agent E3) is made substantially smooth (substantially smooth layer surface Lc) following the substantially smooth layer surface Lb of the second waterproof layer LB.

<7> Silica sand spraying process (ST7)
In the silica sand spraying step (ST7), as shown in FIG. 7, silica sand S is sprayed on the layer surface Lc of the coating film waterproof layer LC to form a silica sand layer SD covering the coating film waterproof layer LC.
The silica sand is No. 3 silica sand (particle diameter: 2.4 mm to 1.2 mm), No. 4 silica sand (particle diameter: 1.2 mm to 0.6 mm), and No. 5 silica sand (particle diameter: 0.8 mm to 0.3 mm). And so on.

In the silica sand spraying step (ST7), as shown in FIG. 7, the silica sand S is sprayed on the layer surface Lc of the coating film waterproof layer LC with a substantially uniform layer thickness to form the silica sand layer SD on the layer surface Lc. ..

<8> Pavement process (ST8)
In the pavement step (ST8), as shown in FIG. 7, the asphalt compound AF is laminated on the layer surface Sd of the silica sand layer SD to form the asphalt pavement layer K covering the silica sand layer SD.
The asphalt compound AF is a mixture of asphalt and aggregate (coarse aggregate, fine aggregate, filler, etc.).

In the pavement step (ST8), the asphalt compound AF is spread on the layer surface Sd of the silica sand layer SD at a temperature suitable for pavement (for example, 140 ° C. to 200 ° C.) and rolled by an iron ring roller or the like to asphalt. The pavement layer K is formed.

As described above, as shown in FIGS. 1 to 7, the waterproof repair method for the concrete floor slab includes an existing pavement removal step (ST1), an impregnated waterproofing liquid application step (ST2), an impregnated waterproofing liquid drying step (ST3), and impregnation. By executing (executing) the waterproof powder coating step (ST4), the impregnated waterproof powder drying step (ST5), the coating agent coating step (ST6), the silica sand spraying step (ST7), and the pavement step (ST8) in this order. A waterproof repair structure W (waterproof structure W for concrete floor slab) of concrete floor slab X is constructed.

Next, regarding the effect test of the waterproof repair method for the concrete floor slab according to the present invention, a "film thickness test", a "tensile adhesion test", a "shear test" and a "Kenken-type adhesive strength test" were carried out.

First, the concrete flat plate, impregnated waterproof liquid, impregnated waterproof powder, asphalt coating waterproof, and those used in the "thickness test", "tensile adhesion test", "shear test" and "Kenken-type adhesive strength test". The primer waterproofing agent will be described.

■ Concrete flat plate (concrete floor slab)
In the "thickness test", "tensile adhesion test", "shear test" and "Kenken-type adhesive strength test" (hereinafter, also referred to as "each test"), the concrete floor slab is "Hanshin Expressway Co., Ltd." With reference to the specifications of "RC floor slab (non-synthetic girder)", a concrete flat plate M (JIS flat plate of Japanese Industrial Standards) with a nominal strength of 27 N / mm ² was used.

The materials used for the concrete flat plate M and the composition of the materials used are shown in "Table 1" and "Table 2".

The concrete flat plate M was formed by pouring the materials used mixed (kneaded) according to the composition shown in "Table 2" into a mold and drying them.
As shown in FIG. 8A, the concrete flat plate M was formed into a square flat plate having a size of 300 mm (horizontal) × 300 mm (length) × 60 mm (plate thickness).

As shown in FIG. 8B, the concrete flat plate M was previously cut with a cutting machine on the plate surface MB in order to simulate the floor slab surface XB having the uneven shape J of the concrete floor slab X obtained by cutting the existing pavement. As a cutting machine, a product "W50DC (road surface cutting machine)" of Wirthgen (Wirtgen Japan) was used to cut the plate surface MB of the concrete flat plate M.
On the concrete flat plate M, a concave-convex-shaped plate surface MB (hereinafter, referred to as “concave-convex plate surface MB”) including a large number of concave portions Q and a large number of convex portions P was formed by cutting with a cutting machine.
In the concrete flat plate M, the uneven plate surface MB was set to a depth d of each recess Q of more than 0.0 mm and 5.0 mm or less (0.0 mm <d ≦ 5.0 mm).
As shown in FIGS. 1 to 7, the uneven plate surface MB of the concrete flat plate M is the floor slab surface XB of the concrete floor slab X (the floor slab surface XB formed in the uneven shape J including the concave portion Q and the convex portion P). Corresponds to.

In each test, in the concrete flat plate M, concrete flat plates M1, M2, M3, and M4 having different cleaning methods of the uneven plate surface MB and the water content (moisture content) of the uneven plate surface MB were used.

1) Concrete flat plate M1
The concrete flat plate M1 is a concrete flat plate from which cutting residues (dust of concrete powder, etc.) have been removed by washing the surface MB of the uneven plate with a brush.
The concrete flat plate M1 has a water content (moisture content) of the uneven plate surface MB set to 1 to 3% (hereinafter, also referred to as "dry / brush-washed concrete flat plate M1").

2) Concrete flat plate M2
The concrete flat plate M2 is a concrete flat plate from which cutting residues (dust of concrete powder, etc.) have been removed by washing the surface MB of the uneven plate with water.
In the concrete flat plate M2, the moisture content (moisture content) of the uneven plate surface MB was set to 1 to 3% (hereinafter, also referred to as "dry / washed concrete flat plate M2").

3) Concrete flat plate M3
The concrete flat plate M3 is a concrete flat plate from which cutting residues (dust of concrete powder, etc.) have been removed by washing the surface MB of the uneven plate with a brush.
The concrete flat plate M3 has a water content (moisture content) of the uneven plate surface MB of 5 to 7% (hereinafter, also referred to as “wet / brush-washed concrete flat plate M3”).

4) Concrete flat plate M4
The concrete flat plate M4 is a concrete flat plate from which cutting residues (dust of concrete powder, etc.) have been removed by washing the surface MB of the uneven plate with water.
The concrete flat plate M4 has a water content (moisture content) of the uneven plate surface MB of 5 to 7% (hereinafter, also referred to as "wet / water-washed concrete flat plate M4").

■ Impregnated waterproof liquid agent The impregnated waterproof liquid agent E1 used in each test is a two-component epoxy resin containing an epoxy resin (water-based epoxy resin) and composed of a main agent and a curing agent.
The main agent and curing agent of the impregnated waterproof liquid agent E1 are shown in "Table 3".
The compounding ratio (weight ratio) of the main agent and the curing agent of the impregnated waterproof liquid agent E1 is shown in "Table 4".

The impregnated waterproof liquid agent E1 is a liquid agent containing a bisphenol A type epoxy resin (main agent) and an aliphatic polyamide (curing agent), and the compounding ratio (weight ratio) of the bisphenol A type epoxy resin and the aliphatic polyamide is set to bisphenol. A type epoxy resin: an aliphatic polyamide = 1: 1 mixed solution.
As a result, the impregnated waterproof liquid agent E1 was made into a liquid agent (very low viscosity liquid agent) having a viscosity of 10 mPa · s to 15 mPa · s (millipascal seconds) at a temperature of 5 to 20 ° C.

(3) Impregnated waterproof powder liquid agent The impregnated waterproof powder liquid agent E2 used in each test is a liquid component containing an epoxy resin (water-based epoxy resin) and a powder liquid mixture containing a powder component.
The liquid component of the impregnated waterproof powder E2 is a two-component epoxy resin liquid containing the same main agent as the impregnated waterproof liquid E1 and the same curing agent as the impregnated waterproof liquid.
In the impregnated waterproof powder liquid agent E2, the main agent and the curing agent of the liquid component are shown in "Table 5".
In the impregnated waterproof powder E2, the blending ratio (weight ratio) of the main agent and the curing agent of the liquid component is the same as that of the impregnated waterproof liquid E1, and is shown in “Table 6”.

The liquid component of the impregnated waterproof powder liquid agent E2 is a liquid agent containing a bisphenol A type epoxy resin (main agent) and an aliphatic polyamide (curing agent), and is a compounding ratio (weight ratio) of the bisphenol A type epoxy resin and the aliphatic polyamide. ) Is mixed with bisphenol A type epoxy resin: aliphatic polyamide = 1: 1.

The powder component of the impregnated waterproof powder liquid agent E2 is a powder agent containing a cement-based powder, an aggregate and an admixture.
In the impregnated waterproof powder liquid agent E2, the cement-based powder, aggregate and admixture of the powder component are shown in "Table 5".
In the impregnated waterproof powder liquid agent E2, the compounding ratio (weight ratio) of the cement-based powder, aggregate and admixture as powder components is shown in "Table 6".
The powder component of the impregnated waterproof powder E2 contains early-strength Portland cement (cement-based powder), aluminum silicate-based special aggregate (aggregate), fly ash (admixture) and calcium sulfate (quick-hardening admixture). A mixture ratio (weight ratio) of early-strength Portland cement, aluminum silicate-based special aggregate, fly ash and calcium sulfate, and early-strength Portland cement: aluminum silicate-based special aggregate: fly ash: sulfuric acid. It is a powder prepared by mixing calcium = 0.595: 1.000: 0.120: 0.255.

As described above, the impregnated waterproof powder E2 is obtained by mixing bisphenol A type epoxy resin, aliphatic polyamide, early-strength Portland cement, aluminum silicate-based special aggregate, fly ash and calcium sulfate.

■ Asphalt coating film waterproofing agent As the asphalt coating film waterproofing agent E3 used in each test, for example, the product "Tough Seal (registered trademark)" of Toa Road Corporation was used.

■ Primer waterproofing agent The primer waterproofing agent E4 used in each test was an asphalt-based primer, and for example, the product "Civil Star (registered trademark) / Civil Star R" of Toa Road Corporation was used.

1. 1. Film Thickness Test Hereinafter, the film thickness test will be described with reference to FIGS. 8 to 18.

<1> Concrete flat plate (concrete floor slab)
In the film thickness test, a dry / brush-washed concrete flat plate M1 and a dry / water-washed concrete flat plate M2 were used.

<2> Test embodiment The film thickness test includes Example 1, Example 2, Example 3-1 and Example 3-2, Example 4, Comparative Example 1-1, Comparative Example 1-2, and Comparative Example 2. Comparative Example 3 and Comparative Example 4 were carried out.

1) Example 1
Example 1 corresponds to a waterproof structure constructed by the waterproof repair method for a concrete floor slab of the present invention.
In Example 1, a concrete flat plate M1 that was dried and washed with water was used.

In Example 1, as shown in FIG. 9A, the impregnated waterproof liquid E1, the impregnated waterproof powder E2, and the asphalt coating film waterproofing agent E3 are applied in this order on the uneven plate surface MB of the concrete flat plate M1. It is constructed (formed) in a waterproof structure in which the first waterproof layer LA, the second waterproof layer LB, and the coating film waterproof layer LC are laminated in this order on the concrete flat plate M1.

In the first embodiment, the impregnated waterproof liquid E1 is applied to the entire surface of the uneven plate surface MB of the concrete flat plate M1, and the uneven plate surface MB (each concave portion Q and each convex portion P) is covered with the impregnated waterproof liquid agent E1 to form an uneven layer. A first waterproof layer LA having a surface La is formed.
In Example 1, the impregnated waterproof liquid agent E1 is applied to the uneven plate surface MB (each concave portion Q and each convex portion P) of the concrete flat plate M1 at a coating amount: 0.25 kg / m ² .
The impregnated waterproof liquid agent E1 was applied to the uneven plate surface MB of the concrete flat plate M1 using a brush and a roller.

In Example 1, when the impregnated waterproof liquid E1 is applied to the concrete flat plate M1 (concavo-convex plate surface MB), the impregnated waterproof liquid E1 (first waterproof layer LA) is dried and cured.
In Example 1, the drying time of the impregnated waterproof liquid E1 is about 40 minutes.

In Example 1, when the impregnated waterproof liquid E1 (first waterproof layer LA) was dried and cured, the impregnated waterproof powder was applied to the entire surface of the uneven layer surface La (concrete flat body M1 uneven plate surface MB) of the first waterproof layer LA. The liquid agent E2 is applied to form a second waterproof layer LB that covers the uneven layer surface La of the first waterproof layer LA.
In Example 1, the impregnated waterproof powder liquid E2 is applied to the uneven layer surface La of the first waterproof layer LA at a coating amount of 1.0 kg / m ² .
The impregnated waterproof powder solution E2 was applied to the surface La of the uneven layer of the first waterproof layer LA using a brush and a roller.

In Example 1, when the impregnated waterproof powder liquid E2 is applied to the first waterproof layer LA (concave and convex layer surface La), the impregnated waterproof powder liquid E2 (second waterproof layer LB) is dried and cured.
In Example 1, the drying time of the impregnated waterproof powder E2 is about 1 hour.

In Example 1, when the impregnated waterproof powder E2 (second waterproof layer LB) was dried, the asphalt coating film waterproofing agent E3 was applied to the entire surface of the substantially smooth layer surface LB of the second waterproof layer LB to make the second waterproof. A coating film waterproof layer LC that covers the substantially smooth layer surface Lb of the layer LB is formed.
In Example 1, the asphalt coating film waterproofing agent E3 is applied to the substantially smooth layer surface Lb of the second waterproof layer LB at a coating amount of 1.2 kg / m ² .
The asphalt coating film waterproofing agent E3 was applied to the substantially smooth layer surface Lb of the second waterproof layer LB using a brush and a roller.

2) Example 2
The second embodiment corresponds to the waterproof structure constructed by the waterproof repair structure of the concrete floor slab of the present invention.
In Example 2, a dry / washed concrete flat plate M2 was used.
In Example 2, as shown in FIG. 9A, the impregnated waterproof liquid E1, the impregnated waterproof powder E2, and the asphalt coating waterproofing agent E3 are sequentially applied onto the uneven plate flat surface MB of the concrete flat plate M2. It is constructed (formed) in a waterproof structure in which the first waterproof layer LA, the second waterproof layer LB, and the coating waterproof layer LC are laminated in this order on the concrete flat plate M2.

In the second embodiment, as described in the first embodiment, the impregnated waterproof liquid agent E1 is applied to the entire surface of the uneven plate surface MB of the concrete flat plate M2 to form the first waterproof layer LA, and the unevenness of the first waterproof layer LA is formed. The impregnated waterproof powder E2 is applied to the entire surface of the layer surface plane La to form the second waterproof layer LB, and the asphalt coating film waterproofing agent E3 is applied to the entire surface of the layer surface LB of the second waterproof layer LB. A waterproof layer LC is formed.
In Example 2, the coating amount of the impregnated waterproof liquid agent E1, the coating amount of the impregnated waterproof powder liquid agent E2, and the coating amount of the asphalt coating film waterproofing agent E3 are the same as those in Example 1.

3) Example 3-1 and Example 3-2
Examples 3-1 and 3-2 correspond to a waterproof structure constructed by the waterproof repair method for concrete floor slabs of the present invention.
In Examples 3-1 and 3-2, a dry / brush-washed concrete flat plate M1 was used.
In Examples 3-1 and 3-2, as shown in FIG. 9B, the impregnated waterproof liquid E1 and the impregnated waterproof powder E2 are applied in this order on the uneven plate surface MB of the concrete flat plate M1. The concrete flat plate M1 is constructed (formed) into a waterproof structure in which the first waterproof layer LA and the second waterproof layer LB are laminated in this order.

In Examples 3-1 and 3-2, the impregnated waterproof liquid E1 is applied to the entire surface of the uneven plate surface MB of the concrete flat plate M1 to form the first waterproof layer LA, as described in the first embodiment. , And the impregnated waterproof powder liquid agent E2 is applied to the entire surface of the uneven layer surface La of the first waterproof layer LA to form the second waterproof layer LB.
In Examples 3-1 and 3-2, the coating amount of the impregnated waterproof liquid agent E1 and the coating amount of the impregnated waterproof powder liquid agent E2 are the same as those in Example 1.

4) Example 4
Example 4 corresponds to a waterproof structure constructed by the waterproof repair structure of the concrete floor slab of the present invention.
In Example 4, a dry / washed concrete flat plate M2 was used.
In Example 4, as shown in FIG. 9B, the impregnated waterproof liquid E1 and the impregnated waterproof powder E2 are applied in this order on the uneven plate surface MB of the concrete flat plate M2, and the concrete flat plate M2 is first waterproofed. It is constructed (formed) in a waterproof structure in which the layer LA and the second waterproof layer LB are laminated in this order.
In the fourth embodiment, the impregnated waterproof liquid agent E1 is applied to the entire surface of the uneven plate surface MB of the concrete flat plate M2 to form the first waterproof layer LA, and the first waterproof layer LA is formed in the same manner as described in the first embodiment. The impregnated waterproof powder liquid E2 is applied to the surface La of the uneven layer to form the second waterproof layer LB.
In Example 4, the coating amount of the impregnated waterproof liquid agent E1 and the coating amount of the impregnated waterproof powder liquid agent E2 are the same as those in Example 1.

5) Comparative Example 1-1, Comparative Example 1-2
As shown in FIG. 9C, Comparative Example 1-1 and Comparative Example 1-2 used a concrete flat plate M1 that was dried and brushed with water.
In Comparative Example 1-1 and Comparative Example 1-2, all of the impregnated waterproof liquid E1, the impregnated waterproof powder liquid E2, the asphalt coating film waterproofing agent E3, and the primer waterproofing agent E4 are applied to the uneven plate surface MB of the concrete flat plate M1. It is a concrete flat plate with the surface MB of the uneven plate exposed.

6) Comparative example 2
In Comparative Example 2, as shown in FIG. 9C, a dry / water-washed concrete flat plate M2 was used.
In Comparative Example 2, the concavo-convex plate surface MB of the concrete flat plate M2 was coated with the concavo-convex plate surface MB without applying any of the impregnated waterproof liquid agent E1, the impregnated waterproof powder liquid agent E2, the asphalt coating film waterproofing agent E3, and the primer waterproofing agent E4. It consists of an exposed concrete flat plate.

7) Comparative example 3
In Comparative Example 3, a dry / brush-washed concrete flat plate M1 was used.
In Comparative Example 3, as shown in FIG. 9D, the primer waterproofing agent E4 and the asphalt coating film waterproofing agent E3 were applied in this order to the entire surface MB of the uneven plate surface MB of the concrete flat plate M1, and the primer was applied to the concrete flat plate M1. It is constructed (formed) in a waterproof structure in which the waterproof layer LD and the coating film waterproof layer LC are laminated in this order.

In Comparative Example 3, the primer waterproofing agent E4 is applied to the entire surface of the uneven plate surface MB of the concrete flat plate M1 to form a primer waterproof layer LD that covers the uneven plate surface MB (each concave portion Q and each convex portion P).
In Comparative Example 3, the primer waterproofing agent E4 is applied to the uneven plate surface MB (each concave portion Q and each convex portion P) of the concrete flat plate M1 at a coating amount of 0.4 l / m ² (liter / square meter).
The primer waterproofing agent E4 is applied to the uneven plate surface MB of the concrete flat plate M1 using a brush and a roller.

In Comparative Example 3, when the primer waterproofing agent E4 was applied to the concrete flat plate M1 (concave and convex plate surface MB), the asphalt coating film waterproofing agent E3 was applied to the entire surface of the layer surface Ld of the primer waterproofing layer LD to form the primer waterproofing layer LD. A coating film waterproof layer LC to cover is formed.
In Comparative Example 3, the asphalt coating film waterproofing agent E3 is applied to the layer surface Ld of the primer waterproofing layer LD at a coating amount of 1.2 kg / m ² .
The asphalt coating film waterproofing agent E3 was applied to the layer surface Ld of the primer waterproofing layer LD using a brush and a roller.

8) Comparative example 4
In Comparative Example 4, a dry / water-washed concrete flat plate M2 was used.
In Comparative Example 4, as shown in FIG. 9D, the primer waterproofing agent E4 and the asphalt coating film waterproofing agent E3 were applied in this order on the uneven plate surface MB of the concrete flat plate M2, and the concrete flat plate M2 was waterproofed with the primer. It is constructed (formed) in a waterproof structure in which the layer LD and the coating film waterproof layer LC are laminated in this order.

In Comparative Example 4, the primer waterproofing agent E4 is applied to the entire surface of the uneven plate surface MB of the concrete flat plate M2 to form the primer waterproof layer LD, and the layer surface of the primer waterproof layer LD is formed in the same manner as described in Comparative Example 3. The asphalt coating film waterproofing agent E3 is applied to the entire surface of Ld to form the coating film waterproof layer LC.
In Comparative Example 4, the coating amount of the primer waterproofing agent and the coating amount of the asphalt coating film waterproofing agent are the same as those of Comparative Example 3.

In Example 1, Example 2, Example 3-1 and Examples 3-2 to 4, Comparative Example 3 and Comparative Example 4, each waterproofing agent or the like is applied and then sufficiently dried (each waterproofing liquid or the like). Was dried for 2 months after application).

<3> Test method 1) Measurement with CT meter The film thickness test is performed on the pavement surface using the rotary texture depth measuring device described in "Pavement Survey / Test Handbook, 2007" edited by Japan Road Association. It was carried out using a CT meter (rotary texture meter) in accordance with the "depth measurement method (SS022-3T)". The CT meter is a road surface roughness meter using a CCD laser displacement sensor.
The CT meter has a structure in which a head equipped with a laser displacement sensor can measure unevenness on the circumference at a certain distance from the center of rotation by rotating on a circular locus with a radius of 142 mm at a position 80 mm high from the measurement surface. is there.

The measurement by the CT meter is performed in Example 1, Example 2, Example 3-1 and Examples 3-2 to 4, Comparative Example 1-1, Comparative Example 1-2, Comparative Example 2, Comparative Example 3 and Comparative Example 4 was carried out.
In the measurement with the CT meter, the number of specimens was 4 (4 dry / brush-washed concrete flat plates M1 or 4 dry / water-washed concrete flat plates M2).
Examples 1, Example 2, Example 3-1 and Example 3-2, Example 4, Comparative Example 1-1, Comparative Example 1-2, Comparative Example 2, Comparative Example 3 or Comparative Example 4 are shown in FIGS. As shown in 11, the four concrete flat plates M1 (or each of the four concrete flat plates M2) are directed toward the CT meter N (laser displacement sensor) with the uneven plate surface MB side (or the coating film waterproof layer LC side) facing the CT meter N (laser displacement sensor). Measured adjacent and side by side.
Subsequently, the laser displacement sensor of the CT meter N is rotated to detect the concave portion Q and the convex portion P of the concave-convex plate surface MB on the circular locus at intervals of 0.87 mm, and the displacement at 1024 points is performed by one rotation of the laser displacement sensor. The data was measured.
As shown in FIG. 11, one rotation of the laser displacement sensor was divided into eight equal sections (A to H), and MPD (Mean Profile Depth) was calculated for each section.
As shown in FIG. 12, the MPD shows the difference between the value on the regression line calculated by the measuring body and the value of the displacement data having the largest convex portion.
In Examples 1, Example 2, Example 3-1 and Example 3-2, Example 4, Comparative Example 1-1, Comparative Example 1-2, Comparative Example 3 and Comparative Example 4, each section B, D , F, H MPD and MDP average values were calculated.

2) Measurement with a digital film thickness meter The film thickness test was carried out using a digital film thickness meter. For the digital film thickness meter, refer to "1.5.7 Method for checking the film thickness of the coating film waterproofing agent for tire adhesion-suppressing asphalt" described in "Pavement Design and Construction Guidelines, 2015" edited by Tokyo Metropolitan Expressway Co., Ltd. Thickness: A film that can measure up to 0.1 mm was selected.

The measurement with the digital film thickness meter was carried out for Example 1 and Comparative Example 3.
In the measurement with the digital film thickness meter, the number of specimens of Example 1 and Comparative Example 3 was 4 (4 dry / brush-washed concrete flat plates M1).
In each concrete flat plate M1 of Example 1 and each concrete flat plate M1 of Comparative Example 2, as shown in FIG. 13, the digital film thickness meter R has a concave portion Q and a convex portion from the uppermost layer (coating film waterproof layer LC). The film thickness in the concave portion Q and the convex portion P was measured in contact with the position of P.
In Example 1 and Comparative Example 3, 20 points of the concave portion Q and 20 points of the convex portion P were arbitrarily extracted and measured per one concrete flat plate M1.
The film thickness is the thickness of the asphalt coating film waterproofing agent E3 applied to the substantially smooth layer surface (second waterproof layer) Lb in Example 1, and the uneven plate surface MB (each) in Comparative Example 3. It is the thickness (total thickness) of the primer waterproofing agent E4 and the asphalt coating film waterproofing agent E3 applied to the concave portion Q and each convex portion P).

<4> Test Results The results of measurement with the CT meter N in the film thickness test are shown in "Table 7" and "Table 8".
“Table 7” shows the average value of MPD of each section B, D, F, H and the standard deviation σ of the displacement data in each Example and each Comparative Example.
"Table 8" shows each section B. in Example 3-1 and Comparative Example 1-1. D. F. MPD of H and each section B. D. F. The average value of MPD of H is shown. “Table 8” shows the average value of the differences in the displacement data and the standard deviation σ of the displacement data in Example 3-1 and Comparative Example 1-1.
In Example 1, Example 3-1 and Comparative Example 1-1 and Comparative Example 3, the distribution of the displacement data and the standard deviation σ of the displacement data are shown in FIG.
In each example and each comparative example, the relationship between the standard deviation σ of the displacement data and the MPD is shown in FIG.
The distribution of MPDs in Example 3-1 and Comparative Example 1-1 is shown in FIG.
In Example 3-1 and Comparative Example 1-1, the distribution of the displacement data and the standard deviation 2σ of the displacement data are shown in FIG.

Table 9 shows the results of measurement with a digital film thickness meter in the concrete plate drying / film thickness test.
In Example 1 and Comparative Example 3, the distribution of the film thickness of each concave portion and each convex portion and the standard deviation 2σ of the film thickness are shown in FIG.

<5> Evaluation of film thickness test

1) Evaluation of measurement by CT meter In the measurement by CT meter of the film thickness test, Examples 1, Example 2, Example 3-1 and Example 3-2 are shown in "Table 7" and "Table 8". As shown in 15 and FIG. 17, the MPD (mm) is smaller than that of Comparative Example 1-1, Comparative Example 1-2, and Comparative Example 2, and the concrete flat plates M1 and M2 are impregnated with the waterproof liquid agent E1 (first waterproof). By applying the layer LA) and the impregnated waterproof powder E2, it was confirmed that the uneven plate surface MB (each convex portion Q and each convex portion P) of the concrete flat plates M1 and M2 tended to be gentle.

The variations in the displacement data of Examples 3-1 and 3-2 (standard deviation σ or 2σ of the displacement data) are compared as shown in “Table 7”, “Table 8”, FIGS. 14 and 17. It was smaller than the variation of the displacement data of Example 1-1 (standard deviation σ or 2σ of the displacement data) and the variation of the displacement data of Comparative Example 1-2 (standard deviation σ or 2σ of the displacement data). Examples 3-1 and 3-2, and Comparative Examples 1-1 and 1-2 use concrete flat plates M1 that are dried and brushed with water under the same conditions.
As a result, in Examples 3-1 and 3-2, the concavo-convex plate surface MB is coated with the impregnated waterproof liquid E1 and the impregnated waterproof powder liquid E2 on the concavo-convex plate surface MB of the concrete M1 that has been dried and brushed with water. It was confirmed that (each concave portion Q and each convex portion P) could be made substantially smooth to adjust the unevenness of the uneven plate surface MB.

As shown in "Table 7", the variation of the displacement data of Example 4 (standard deviation σ of the displacement data) was smaller than the variation of the displacement data of Comparative Example 2 (standard deviation σ of the displacement data). In Example 4 and Comparative Example 2, a dry / water-washed concrete flat plate M2 under the same conditions is used.
As a result, in Example 4, the concavo-convex plate surface MB (each concave portion Q and each convex portion) is applied by applying the impregnated waterproof liquid agent E1 and the impregnated waterproof powder liquid agent E2 to the concavo-convex plate surface MB of the concrete flat plate M2 that has been dried and washed with water. It was confirmed that the unevenness of the uneven plate surface MB can be adjusted by making P) substantially smooth.

As shown in "Table 7" and FIG. 14, the variation of the displacement data of the first embodiment (standard deviation σ of the displacement data) is the variation of the displacement data of the comparative example 1-1 (standard deviation σ of the displacement data). It was smaller than the variation of the displacement data in Comparative Example 1-2 (standard deviation σ of the displacement data). Example 1 and Comparative Example 1-1. In Comparative Example 1-2, a concrete flat plate M1 that has been dried and washed with water under the same conditions is used.
As a result, in Example 1, the concavo-convex plate surface MB is coated with the impregnated waterproof liquid agent E1, the impregnated waterproof powder liquid agent E2, and the asphalt coating film waterproofing agent E3 on the concavo-convex plate surface MB of the concrete flat plate M1 that has been dried and brushed with water. It was confirmed that (each concave portion Q and each convex portion P) could be made substantially smooth to adjust the unevenness of the uneven plate surface MB.

As shown in "Table 7", the variation of the displacement data of Example 2 (standard deviation σ of the displacement data) was smaller than the variation of the displacement data of Comparative Example 2 (standard deviation σ of the displacement data). In Example 2 and Comparative Example 2, a dry / water-washed concrete flat plate M2 under the same conditions is used.
As a result, in Example 2, the concavo-convex plate surface MB (impregnated waterproof liquid agent E1, impregnated waterproof powder liquid agent E2, and asphalt coating film waterproofing agent E3) is applied to the concavo-convex plate surface MB of the concrete flat plate M2 that has been dried and washed with water. It was confirmed that the unevenness of the uneven plate surface MB can be adjusted by making each concave portion Q and each convex portion P) substantially smooth.

From the evaluation of the measurement by the CT meter, in Example 1, Example 2, Example 3-1 and Example 3-2 and Example 4, the uneven plate surface MB of the concrete flat plates M1 and M2 was impregnated with at least the waterproofing liquid. By applying E1 and the impregnated waterproof powder E2 to form a waterproof structure for the first waterproof layer LA and the second waterproof layer LB, the uneven plate surface MB (each concave portion Q and convex portion P) is substantially smoothed (or smoothed). ) Can be achieved.
In Example 1, Example 2, Example 3-1 and Example 3-2 and Example 4, concrete is applied by applying the impregnated waterproof powder E2 to the entire surface of the uneven layer surface La of the first waterproof layer LA. Flat plate M1. It can be said that the second waterproof layer LB that makes the uneven plate surface MB (each concave portion Q and each convex portion P) of M2 substantially smooth (or smooth) is formed.

Examples 1, Example 2, Example 3-1 and Example 3-2, Example 4, Comparative Example 1-1, Comparative Example 1-2, Comparative Example 3 and Comparative Example 4 are as shown in FIG. In addition, a relatively high correlation is observed between the MPD (mm) and the standard deviation σ (mm) of the displacement data.
Thereby, quantitative evaluation of the surface condition of the substantially smooth layer surface Lb (or the layer surface Lc of the coating film waterproof layer LC) of the second waterproof layer LB by the MPD (mm) or the standard deviation σ (mm) of the displacement data. Was confirmed to be possible.

2) Evaluation of measurement by a digital film thickness meter In Comparative Example 3, as shown in "Table 9", the maximum value of the film thickness of the concave portion was 4.5 mm and the minimum value of the film thickness of the convex portion was 0.2 mm. there were.
In Example 1, as shown in “Table 9”, the maximum value of the film thickness of the concave portion was 3.2 mm, and the minimum value of the film thickness of the convex portion was 0.9 mm.
As shown in “Table 9” and FIG. 18, the variation (standard deviation σ) of the film thickness (mm) of Example 1 is the variation (standard deviation of film thickness) of the film thickness (mm) of Comparative Example 3. It became smaller than σ).
As a result, in Example 1, the impregnated waterproof liquid agent E1, the impregnated waterproof powder liquid agent E2, and the asphalt coating film waterproofing agent E3 are applied to the uneven plate surface MB of the concrete flat plate M1 that has been dried and brushed with water. In comparison, it can be confirmed that the minimum value of the film thickness (mm) of each convex portion is improved.

In Example 1, the variation (maximum value-minimum value) between the maximum value and the minimum value of the film thickness (mm) is, as shown in "Table 9", the maximum value-minimum value = 3.2 (mm). -0.9 (mm) = 2.3 (mm).
In Comparative Example 3, the variation between the maximum value and the minimum value of the film thickness (mm) is as shown in “Table 9”, maximum value-minimum value = 4.5 (mm) -0.2 (mm) =. It is 4.3 (mm).
The reduction rate of the variation (maximum value-minimum value) of the film thickness (mm) of Example 1 is compared with the variation (maximum value-minimum value) of the film thickness (mm) of Comparative Example 3.
[(4.3-2.3) /4.3] × 100 = 46.5%, and the film thickness (mm) of the uneven plate surface MB (each concave portion Q and each convex portion P) of the concrete flat plate M1 is It was confirmed that the homogenization was possible as compared with Comparative Example 3.

From the evaluation of the measurement by the digital film thickness meter, the impregnated waterproofing agent E1, the impregnated waterproof powder liquid agent E2, and the asphalt coating waterproofing agent E3 are applied in this order to the floor slab surface XB of the uneven shape J of the actual concrete floor slab X. By laminating the first waterproof layer LA, the second waterproof layer LB, and the coating waterproof layer LC in this order on the floor slab surface XB of the uneven shape J, the uneven shape J of the floor slab surface XB can be substantially smoothed. While increasing the thickness of each convex portion P (the thickness of the asphalt coating waterproofing agent E3), the film thickness of the floor slab surface XB having the uneven shape J can be homogenized.

2. Tensile Adhesion Test Hereinafter, the tensile adhesion test will be described with reference to FIGS. 9A and 19.

<1> Concrete flat plate (concrete floor slab)
In the tensile adhesion test, a dry / brush-washed concrete flat plate M1, a dry / water-washed concrete flat plate M2, a wet / brush-washed concrete flat plate M3, and a wet-water-washed concrete flat plate M4 were used.

<2> Test Aspectment The tensile adhesion test was carried out for Example 1, Example 2, Example 5, Example 6, Comparative Example 3, and Comparative Example 4.
In addition, Example 1, Example 2, Comparative Example 3 and Comparative Example 4 in which the tensile adhesion test was carried out have the same configuration (the same structure) as Example 1, Example 2, Comparative Example 3 and Comparative Example 4 of the film thickness test. ).

1) Example 5
Example 5 corresponds to a waterproof structure constructed by the waterproof repair method for concrete floor slabs of the present invention.
In Example 5, a wet / brush-washed concrete flat plate M3 was used.
In Example 5, as shown in FIG. 9A, the impregnated waterproof liquid E1, the impregnated waterproof powder E2, and the asphalt coating film waterproofing agent E3 are sequentially applied onto the uneven plate surface MB of the concrete flat plate M3. It is constructed (formed) in a waterproof structure in which the first waterproof layer LA, the second waterproof layer LB, and the coating film waterproof layer LC are laminated in this order on the concrete flat plate surface M3.

In the fifth embodiment, as described in the first embodiment, the impregnated waterproof liquid agent E1 is applied to the entire surface of the uneven plate surface MB of the concrete flat plate M3 to form the first waterproof layer LA, and the unevenness of the first waterproof layer LA is formed. The impregnated waterproof powder E2 is applied to the entire surface of the layer surface La to form the second waterproof layer LB, and the asphalt coating film waterproof agent E3 is applied to the entire surface of the substantially smooth layer surface LB of the second waterproof layer LB. A film waterproof layer LC is formed.
In Example 5, the coating amount of the impregnated waterproof liquid agent E1, the coating amount of the impregnated waterproof powder liquid agent E2, and the coating amount of the asphalt coating film waterproofing agent E3 are the same as those in Example 1.

2) Example 6
Example 6 corresponds to a waterproof structure constructed by the waterproof repair method for concrete floor slabs of the present invention.
In Example 6, a wet / water-washed concrete flat plate M4 was used.
In Example 6, as shown in FIG. 9A, the impregnated waterproof liquid E1, the impregnated waterproof powder E3, and the asphalt coating film waterproofing agent E3 are applied in this order on the uneven plate surface MB of the concrete flat plate M4. It is constructed (formed) in a waterproof structure in which the first waterproof layer LA, the second waterproof layer LB, and the coating film waterproof layer LC are laminated in this order.

In the sixth embodiment, as described in the first embodiment, the impregnated waterproof liquid agent E1 is applied to the entire surface of the uneven plate surface MB of the concrete flat plate M3 to form the first waterproof layer LA, and the unevenness of the first waterproof layer LA is formed. The impregnated waterproof powder E2 is applied to the entire surface of the layer surface La to form the second waterproof layer LB, and the asphalt coating film waterproof agent E3 is applied to the entire surface of the substantially smooth layer surface LB of the second waterproof layer LB. A film waterproof layer LC is formed.
In Example 6, the coating amount of the impregnated waterproof liquid agent E1, the coating amount of the impregnated waterproof powder liquid agent E2, and the coating amount of the asphalt coating film waterproofing agent E3 are the same as those in Example 1.

<3> Number of specimens In the tensile adhesion test, the number of specimens (number of specimens) of Example 1, Example 2, Example 5, Example 6, Comparative Example 3 and Comparative Example 4 was set to 4.

<4> Test method The tensile adhesion test is based on the "Elemental test by test method (tensile adhesion test / conducted in an environment of 23 ° C)" specified in "Japan Road Association Road Bridge Floor Slab Waterproofing Handbook, 2007". It was carried out based on.

<5> Pass / Fail of Tensile Adhesive Strength In the tensile adhesive test, the tensile adhesive strength (N / mm ² ) of each example and each comparative example is specified in "Japan Road Association Road Bridge Floor Slab Waterproof Handbook, 2007". Judgment was made based on the "Guidelines for Pass / Fail Judgment".
As a guideline for pass / fail judgment, a tensile adhesive strength of 0.6 (N / mm ² ) or more was regarded as "pass".

<6> Test Results In the tensile adhesion test, the tensile adhesive strength (N / mm ² ) and the fracture status are shown in "Table 10" and "Table 11".
"Table 11" shows the type (break content) of the break state of "Table 10".
The average value of the tensile adhesive strength (N / mm ² ) of Example 1, Example 2, Example 5, Example 6, Comparative Example 3 and Comparative Example 4 is shown in FIG.

<6> Evaluation of Tensile Adhesive Test In Example 1, Example 2, Example 5 and Example 6, the tensile adhesive strength (N / mm ² ) is a guideline for acceptance judgment as shown in "Table 10". It was a value satisfying 0.6 (N / mm ² ) or more.
In Comparative Example 3 and Comparative Example 4, as shown in “Table 10”, the four specimens did not satisfy the guideline for pass / fail judgment: 0.6 (N / mm ² ) or more.
As a result, Example 1, Example 2, Example 5 and Example 6 can obtain the same or superior tensile adhesive strength (N / mm ² ) as those of Comparative Example 3 and Comparative Example 4.
The average tensile strength (N / mm ² ) of Example 1, Example 2, Example 5 and Example 6 is 0.95 (N / mm ² ), 0. It is 78 (N / mm ² ), 0.73 (N / mm ² ), 0.90 (N / mm ² ), and the guideline for pass / fail judgment: 1.2 times 0.6 (N / mm ² ). We were able to secure the strength to exceed.

From the evaluation of the tensile adhesion test, the impregnated waterproof liquid E1, the impregnated waterproof powder liquid E2, and the asphalt coating film waterproofing agent E3 were applied in this order to the floor slab surface XB of the uneven shape J of the actual concrete floor slab X to form the uneven shape. A guideline for pass / fail judgment is made by laminating the first waterproof layer LA, the second waterproof layer LB, and the coating film waterproof layer LC on the floor slab surface XB of J in this order to substantially smooth the floor slab surface XB of the uneven shape J. : A tensile adhesive strength (N / mm ² ) of 0.6 (N / mm ² ) or more can be secured.

3. 3. Shear test Hereinafter, the shear test will be described with reference to FIG.

<1> Concrete flat plate (concrete floor slab)
In the shear test, as in the tensile adhesion test, a dry / brush-washed concrete flat plate M1, a dry / water-washed concrete flat plate M2, a wet / brush-washed concrete flat plate M3, and a wet / water-washed concrete flat plate M4 were used.

<2> Test Aspects The shear test was carried out for Example 1, Example 2, Example 5, Example 6, Comparative Example 3 and Comparative Example 4 in the same manner as the tensile adhesion test.
In addition, Example 1, Example 2, Comparative Example 3 and Comparative Example 4 which carried out the shear test had the same structure (the same structure) as Example 1, Example 2, Comparative Example 3 and Comparative Example 4 of the film thickness test. Is.
Further, Examples 5 and 6 in which the shear test was performed have the same configuration (same structure) as Examples 5 and 6 in the tensile adhesion test.

<3> Number of specimens In the shear test, the number of specimens (number of specimens) of Example 1, Example 2, Example 5, Example 6, Comparative Example 3 and Comparative Example 4 was set to 4.

<4> Test method The shear test is based on the "elemental test by the test method (shear test / conducted in an environment of 23 ° C temperature)" specified in "Japan Road Association Road Bridge Floor Slab Waterproofing Handbook, 2007". Carried out.

<5> Pass / Fail of Shear Force In the shear test, the shear strength (N / mm ² ) and displacement (mm) of each example and each comparative example are described in "Japan Road Association Road Bridge Floor Slab Waterproof Handbook, 2007". The judgment was made according to the "standard of pass / fail judgment" specified in ".
As a guideline for pass / fail judgment, a shear strength of 0.15 (N / mm ² ) or more was regarded as "pass", and a displacement amount of 1.0 mm or more was regarded as "pass".

<6> Test Results In the shear test, the shear strength (N / mm ² ) and fracture status are shown in "Table 12" and "Table 13".
"Table 13" shows the format (destruction content) of the destruction status of "Table 12".
The average value of the shear strength (N / mm ² ) of Example 1, Example 2, Example 5, Example 6, Comparative Example 3 and Comparative Example 4 is shown in FIG.

<6> Evaluation of Shear Test In Example 1, Example 2, Example 5 and Example 6, the shear strength (N / mm ² ) and variable (mm) are as shown in "Table 12" and FIG. , Estimated pass / fail evaluation: A value satisfying 0.15 (N / mm ² ) or more.
In Example 1, Example 2, Example 5, and Example 6, the displacement amount (mm) was a value satisfying the guideline for pass / fail judgment: 1.0 mm or more, as shown in “Table 12”.
In Example 1, Example 2, Example 5, and Example 6, the shear strength (N / mm ² ) has a value equal to or superior to that of Comparative Example 3 and Comparative Example 4, as shown in “Table 12”. I was able to get it.

As a result, the impregnated waterproof liquid E1, the impregnated waterproof powder E2, and the asphalt coating film waterproofing agent E3 are applied in this order to the floor slab surface XB of the uneven shape J of the actual concrete floor slab X, and the floor slab having the uneven shape J is applied. By laminating the first waterproof layer LA, the second waterproof layer LB, and the coating film waterproof layer LC in this order on the surface XB and substantially smoothing the floor slab surface XB having the uneven shape J, a guideline for pass / fail judgment: 0.15. A shear strength (N / mm ² ) of (N / mm ² ) or higher can be secured.

4. Kenken-type adhesive strength test The Kenken-type adhesive strength test will be described below with reference to FIGS. 21 to 22.

<1> Concrete flat plate (concrete floor slab)
Similar to the tensile adhesion test, the Kenken-type adhesive strength test uses dry / brush-washed concrete flat plate M1, dry / water-washed concrete flat plate M2, wet / brush-washed concrete flat plate M3, and wet / water-washed concrete flat plate M4. used.

<2> Test Aspects The Kenken-type adhesive strength test was carried out for Example 1, Example 2, Example 5, Example 6, Comparative Example 3 and Comparative Example 4 in the same manner as the tensile adhesive test.
In addition, Example 1, Example 2, Comparative Example 3 and Comparative Example 4 in which the Kenken-type adhesive strength test was carried out have the same configuration as Example 1, Example 2, Comparative Example 3 and Comparative Example 4 of the film thickness test. (Same structure).
Further, Examples 5 and 6 in which the Kenken-type adhesive force test was carried out have the same configuration (same structure) as Examples 5 and 6 in the tensile adhesive force test.

<3> Measurement points In the Kenken-type adhesive strength test, the measurement points of Example 1, Example 2, Example 5, Example 6, Comparative Example 3 and Comparative Example 4 are on one concrete flat plate M1 to M4. On the other hand, it was given 5 points.

<4> Test method The Kenken-type adhesive strength test is based on the "Surface Coating Material Adhesive Strength Test Method (JSCE-K531-20139)" specified in the "Japan Society of Civil Engineers Standards". This was carried out using a JSCE-type adhesive strength tester.
The Kenken-type adhesive strength test was carried out in an environment with a temperature of 5 ° C and an environment with a temperature of 23 ° C.
The Kenken-type adhesive strength test in an environment with a temperature of 23 ° C. (hereinafter referred to as "the Kenken-type adhesive strength test at 23 ° C.") includes Example 1, Example 2, Example 5, Example 6, and Comparative Example 3. And Comparative Example 4 was carried out.
The Kenken-type adhesive strength test (hereinafter referred to as "5 ° C. Kenken-type adhesive strength test") in an environment of a temperature of 5 ° C. was carried out for Example 1, Example 5 and Comparative Example 3.

<5> Test Results In the Kenken-type adhesive strength test at an air temperature of 23 ° C., the adhesive strength (MPa) and the fracture status are shown in "Table 14".
In the Kenken-type adhesive strength test at a temperature of 5 ° C., the adhesive strength (MPa) and the state of fracture are shown in "Table 15".
In the Kenken-type adhesive strength test at a temperature of 23 ° C., the average adhesive strength (MPa) of Example 1, Example 2, Example 5, Example 6, Comparative Example 3 and Comparative Example 4 is shown in FIG.
The average adhesive strength (MPa) of Example 1, Example 5, and Comparative Example 3 in the Kenken-type adhesive strength test at a temperature of 5 ° C. is shown in FIG.

<6> Evaluation of Kenken-type adhesive strength test 1) Evaluation of Kenken-type adhesive strength test at a temperature of 23 ° C. The average adhesive strength (MPa) of Example 1, Example 2, Example 5 and Example 6 is As shown in "Table 14" and FIG. 21, the values were 0.65 (MPa), 0.54 (MPa), 0.53 (MPa), and 0.50 (MPa).
The average adhesive strength (MPa) of Comparative Example 3 and Comparative Example 4 was 0.40 (MPa) and 0.42 (MPa) as shown in "Table 14" and FIG. 21.
From the evaluation of the Kenken-type adhesive strength test, in Example 1, Example 2, Example 5 and Example 6, the average of the adhesive strength (MPa) is the adhesive strength (MPa) of Comparative Example 3 and Comparative Example 4. It was 1.3 to 1.4 times larger than the average.
2) Evaluation of Kenken-type adhesive strength test at a temperature of 5 ° C. The average adhesive strength (MPa) of Example 1 and Example 5 is 1.24 (MPa) as shown in "Table 15" and FIG. , 0.94 (MPa).
The average adhesive strength (MPa) of Comparative Example 3 was 0.77 (MPa).
As a result, in Example 1, the average adhesive strength (MPa) was 1.6 times larger than that of Comparative Example 3. In Example 5, the average adhesive strength (MPa) was 1.2 times larger than the average adhesive strength (MPa) of Comparative Example 3.

3) Comprehensive evaluation of Kenken-type adhesive strength test In Example 1 and Example 5, the average adhesive strength (MPa) is the temperature as shown in "Table 14", "Table 15", FIGS. 21 and 22. The 5 ° C environment was larger than the 23 ° C environment. In Examples 1 and 5, in an environment with a temperature of 5 ° C., the impregnated waterproof liquid agent E1 and the impregnated waterproof powder liquid agent E2 were cured (effect due to temperature dependence) as compared with the environment with a temperature of 23 ° C., and the first waterproof layer LA, It is presumed that this is due to the improvement in the material strength leading up to the cohesive failure of the second waterproof layer LB.

As shown in "Table 14" and "Table 15", the average tensile strength (MPa) of Example 1, Example 2, Example 5, and Example 6 is the adhesive strength of Comparative Example 3 and Comparative Example 4. It is larger than the average of MPa), and it is considered important to smooth the uneven plate surface MB of the concrete flat plates M1 to M4 in order to improve the adhesive strength (MPa).
For example, in Comparative Example 3, as described in “Table 9” of the film thickness test, the variation in film thickness (mm) becomes large (maximum film thickness: 4.5 mm, minimum film thickness:: 0.2 mm), when the Kenken-type adhesive strength test is carried out, it is assumed that cohesive failure occurs from the convex parts with a thin film thickness. That is, it can be said that Comparative Example 3 shows a tendency to move to overall fracture triggered by local fracture from a convex portion having a thin film thickness.
In Example 1, as described in “Table 9” of the film thickness test, the variation in film thickness (mm) is small (maximum film thickness: 3.2 mm, minimum film thickness: 0. 9 mm), even if the Kenken-type adhesive strength test is carried out, uniform tensile resistance can be ensured over the entire surface MB of the uneven plate surface MB of the concrete flat plate M1, and local fracture is less likely to occur as compared with Comparative Example 3. Conceivable.

From the comprehensive evaluation of the Kenken-type adhesive strength test, the impregnated waterproof liquid E1, the impregnated waterproof powder liquid E2, and the asphalt coating waterproofing agent E3 were applied in this order to the floor slab surface XB of the uneven shape J of the actual concrete floor slab X. By laminating the first waterproof layer LA, the second waterproof layer LB, and the coating waterproof layer LC in this order on the floor slab flat surface XB of the uneven shape J, the floor slab surface XB of the uneven shape J is substantially smoothed. It is possible to secure an adhesive strength (MPa) superior to that of Comparative Example 3 and Comparative Example 4.

5. Correlation evaluation of film thickness test (thickness), tensile adhesive test (adhesive strength) and Kenken-type adhesive strength test (adhesive strength) Below, correlation evaluation of film thickness test, tensile adhesive test and Kenken-type adhesive strength test Will be described with reference to FIGS. 23 to 25.

In Example 1, Example 2, Comparative Example 3 and Comparative Example 4, the average value of MPD in "Table 7" of the film thickness test, the standard deviation σ of the displacement data in "Table 7" of the film thickness test, and the tensile adhesion test. FIG. 23 shows the relationship between the average tensile adhesive strength in “Table 10” and the average adhesive strength in “Table 14 (temperature 23 ° C. environment)” of the Kenken-type adhesive strength test.
FIG. 23 shows the MPDs of Example 2, Comparative Example 3 and Comparative Example 4 with the average value of the MPD of Example 1, the standard deviation σ of the displacement data, the average of the tensile adhesive strength, and the adhesive strength as “reference 1”. The mean value, standard deviation σ of the displacement data, tensile adhesive strength and adhesive strength are shown.

In Example 1, Example 2, Comparative Example 3 and Comparative Example 4, the tensile adhesive strength and the adhesive strength tend to decrease as the standard deviation σ of the displacement data increases, as shown in FIG. 23.

In Example 1, Example 2, Comparative Example 3 and Comparative Example 4, the tensile adhesive strength (N / mm ² ) and the standard deviation σ of the displacement data are correlated as shown in FIG. 24.
In Example 1, Example 2, Comparative Example 3 and Comparative Example 4, the adhesive strength (MPa) and the standard deviation σ of the displacement data are correlated as shown in FIG. 25.
In such a correlation, when the uneven plate surface MB (each concave portion Q and each convex portion P) of the concrete flat plate M1 becomes substantially smooth, the standard deviation σ of the displacement data becomes small, and the tensile adhesive strength (N / mm ² ). Or it is caused by the improvement of the adhesive strength (MPa).
The guideline for pass / fail judgment of "Japan Road Association Road Bridge Floor Slab Waterproof Handbook, 2007" is that the tensile adhesive strength is 0.6 (N / mm ² ) or more, so it is judged from the regression line shown in FIG. 24. , Standard deviation of displacement data σ: σ = 0.9 mm or less.

The present invention is optimal for repairing existing pavement of concrete slabs.

X Concrete floor slab XA Floor slab surface XB Floor slab surface with uneven shape J Y Existing pavement OA Pavement layer (existing)
J Concavo-convex shape OW waterproof layer (existing)
OF coating film waterproof layer (existing)
OS silica sand layer (existing)
Q Concave part P Convex part LA 1st waterproof layer La Concavo-convex layer surface (1st waterproof layer)
LB 2nd waterproof layer Lb Approximately smooth layer surface (2nd waterproof layer)
LC coating film waterproof layer Lc Approximately smooth layer surface (coating film waterproof layer)
SD silica sand layer Sd layer surface (silica sand layer)
K Asphalt pavement layer AF Asphalt compound E1 Impregnated waterproof liquid agent E2 Impregnated waterproof powder liquid agent E3 Asphalt coating film waterproofing agent S Silica sand W Waterproof repair structure M1 Concrete flat plate (drying / brush washing)
M2 concrete flat plate (drying / washing)
M3 concrete flat plate (wet, brush washed with water)
M4 concrete flat plate (wet / washed with water)
MB board surface LD primer waterproof layer Ld layer surface (primer waterproof layer)
N CT meter R Digital film thickness meter

Claims (7)

The existing pavement removal step of cutting the existing pavement including the pavement layer laminated on the floor slab surface of the concrete floor slab and removing the existing pavement from the floor slab surface.
By cutting the existing pavement in the existing pavement removing step, the surface of the floor slab formed into an uneven shape including concave portions and convex portions is impregnated with an impregnated waterproof liquid agent containing an epoxy resin, and the uneven shape of the floor. A step of applying the impregnated waterproof liquid agent by covering the plate surface with the impregnated waterproof liquid agent to form a first waterproof layer having an uneven layer surface.
An impregnated waterproof powder liquid agent in which a liquid component and a powder component containing an epoxy resin are mixed is applied to the surface of the uneven layer of the first waterproof layer, and the surface of the uneven layer is covered with the impregnated waterproof powder liquid agent. 1 The impregnated waterproof powder coating step of forming a second waterproof layer that substantially smoothes the surface of the uneven layer of the waterproof layer, and
A coating film waterproofing agent application step of applying an asphalt coating film waterproofing agent to a substantially smooth layer surface of the second waterproofing layer to form a coating film waterproofing layer covering the second waterproofing layer.
A silica sand spraying step of spraying silica sand on the layer surface of the coating film waterproof layer to form a silica sand layer covering the coating film waterproof layer.
A pavement process in which asphalt is laminated on the surface of the silica sand layer to form an asphalt pavement layer covering the silica sand layer.
A waterproof repair method for concrete floor slabs, which is characterized by containing. The impregnated waterproof liquid and the liquid component of the impregnated waterproof powder are
Epoxy resin of the same base material and
With the same hardener,
Containing
The powder component of the impregnated waterproof powder liquid agent is
Cement powder and
Aggregate and
With admixture
The method for waterproofing and repairing a concrete floor slab according to claim 1, wherein the concrete floor slab is contained. The impregnated waterproof liquid and the liquid component of the impregnated waterproof powder are
Main agent: Bisphenol A type epoxy resin and
Hardener: Aliphatic polyamines and
The method for waterproofing and repairing a concrete floor slab according to claim 2, wherein the concrete floor slab is contained. The impregnated waterproof liquid and the liquid component of the impregnated waterproof powder are
The waterproof repair method for a concrete floor slab according to claim 2 or 3, wherein the weight ratio of the main agent and the curing agent is the main agent: curing agent = 1: 1. The powder component of the impregnated waterproof powder liquid agent is
Cement-based powder: Early-strength Portland cement and
Aggregate: Aluminum silicate-based special aggregate and
Admixture: Fly ash and calcium sulfate,
The method for waterproofing and repairing a concrete floor slab according to any one of claims 2 to 4, wherein the concrete floor slab is contained. The powder component of the impregnated waterproof powder liquid agent is
Weight ratio of early-strength Portland cement, aluminum silicate-based special aggregate, fly ash and calcium sulfate,
The concrete floor slab according to claim 5, wherein the early-strength Portland cement: aluminum silicate-based special aggregate: fly ash: calcium sulfate = 0.595: 1.000: 0.120: 0.255. Waterproof repair method. The impregnated waterproof liquid agent is
Main agent: Bisphenol A type epoxy resin and
Hardener: Contains aliphatic polyamines,
The weight ratio of the main agent and the curing agent is as follows: main agent: curing agent = 1: 1.
The impregnated waterproof powder solution is
Main agent: Bisphenol A type epoxy resin and
Hardener: Contains aliphatic polyamines,
The liquid component having a weight ratio of the main agent and the curing agent of: main agent: curing agent = 1: 1
Cement-based powder: Early-strength Portland cement and
Aggregate: Aluminum silicate-based special aggregate and
Admixture: Contains fly ash and calcium sulfate,
Weight ratio of early-strength Portland cement, aluminum silicate-based special aggregate, fly ash and calcium sulfate, early-strength Portland cement: aluminum silicate-based special aggregate: fly ash: calcium sulfate = 0.595: 1.000: It is composed of the powder component of 0.120: 0.255.
By cutting the existing pavement in the existing pavement removing step
The floor slab surface is formed in an uneven shape having a depth of the recess: more than 0.0 mm and 5.0 mm or less.
In the impregnation waterproof liquid application step,
The impregnated waterproof liquid agent is
The floor slab surface having a concave-convex depth of more than 0.0 mm and 5.0 mm or less is coated with a coating amount of 0.25 kg / m ² to have the concave-convex layer surface. Forming the first waterproof layer,
In the impregnation waterproof powder application step,
The impregnated waterproof powder solution is
The first aspect of the present invention is characterized in that the second waterproof layer is applied to the surface of the uneven layer of the first waterproof layer at a coating amount of 1.00 kg / m ² to substantially smooth the surface of the uneven layer. The waterproof repair method for concrete floor slabs described.

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