JP2021095822A - Floor slab waterproof structure, manufacturing method of the same, and materials used for the same - Google Patents

Abstract

To provide a floor slab waterproof structure having excellent floor slab adhesiveness, and capable of adjusting unevenness, and being constructed in a short time.SOLUTION: A floor slab waterproof structure has a primer composition curing layer and an unevenness adjustment layer provided on a concrete floor slab. The primer composition has an impregnation function and contains a radical reaction curing type acrylic resin. It is preferable that the unevenness adjustment layer be composed of a resin mortar or a polymer cement mortar.SELECTED DRAWING: Figure 1

Description

The present invention relates to a floor slab waterproof structure, a method for producing the same, and a material used therein.

Reinforced concrete decks used for road bridges deteriorate and are damaged due to fatigue caused by repeated loading of automobile loads. In the fatigue of concrete decks, cracks gradually progress due to the load of automobiles that are moved and loaded, and eventually the concrete decks may fall off. At this time, it is known that the presence of water on the surface of the concrete deck significantly accelerates the progress and deterioration of cracks. For this reason, a floor slab waterproofing method is used to block rainwater from entering the floor slab from the asphalt pavement surface.

Patent Document 1 describes a (meth) acrylate-based weight that can be dissolved or swollen in a (meth) acrylate monomer mixture (A) containing 2-ethylhexyl (meth) acrylate and a (meth) acrylate monomer mixture (A). polymer (B), and containing a polybutylene glycol di (meth) acrylate (C), the weight average of the repeating unit represented by _{(C 4} H 8 _{O) n} in said polybutylene glycol di (meth) acrylate (C) A floor slab waterproof material containing a curable resin composition (S) having a molecular weight of 500 or more and an aggregate (D) is disclosed.

Patent Document 2 describes a curable resin layer, a silica sand layer coated with petroleum asphalt held by the curable resin layer, and a heated asphalt coating film on a road bridge floor surface such as a concrete deck or a steel deck. A waterproof structure for a road bridge deck, characterized in that a waterproof material layer and an asphalt pavement layer are sequentially laminated, is disclosed.

In Patent Document 3, in a waterproof pavement structure of a concrete floor slab in which a waterproof pavement is provided on the floor slab, a primer layer, a waterproof layer, and an adhesive layer are provided on the concrete floor slab in order from the lower layer. The adhesive layer is a layer formed by using a methacrylic resin as a main component, and is formed by applying 0.7 to 1.1 kg of a methacrylic resin per square meter on the surface of the waterproof layer, and is adhered. The surface of the layer is obtained by spraying granular hard aggregate on the entire surface, and asphalt emulsion is sprayed on the hard aggregate. The hard aggregate has a particle size of 0.5 to 2 A waterproof pavement structure of a concrete floor slab in which a 0.0 mm material accounts for 80% by mass or more of the total aggregate is disclosed.

When removing the existing asphalt pavement in the repair of a concrete deck bridge, the surface of the concrete deck may be cut by using a cutting machine, etc., and uneven land (uneven cutting marks) may remain on the surface of the concrete deck. is there. In addition, microcracks (fine cracks) may occur on the surface of the deck due to the impact of the cutting machine on the deck. It is known that the vicinity of the deck surface where microcracks are present is fragile, and the adhesiveness between the deck and the waterproof layer is reduced. On the other hand, Non-Patent Document 1 describes that the deck slab should be repaired by using a highly permeable primer.

Patent Document 4 describes an acrylic radical curable liquid resin composition as a material that is impregnated in a concrete deck and then cured. However, since the acrylic radical curable liquid resin composition is inferior in adhesiveness, it is necessary to apply a surface modifier, and in addition to the curing time for curing the resin, the working time for applying the surface modifier There was a problem that it took. In order to solve this problem, Patent Document 5 describes, as a method of enhancing the adhesive force, a low-viscosity epoxy resin adhesive is applied to a concrete floor slab, impregnated, and then a heated asphalt waterproofing material is applied. It is described that the epoxy resin adhesive and the asphalt waterproofing material are simultaneously cured in a short time by the heat of the asphalt waterproofing material.

On the other hand, when the floor slab is waterproofed directly on the floor slab where the cutting marks are present and the vehicle runs, the load is concentrated on the waterproof layer on the convex portion of the floor slab, and there is a concern that the waterproof layer will penetrate and the waterproof performance will be lost. In addition, it has been reported that the adhesive strength between the deck and the waterproof layer decreases. On the other hand, Non-Patent Documents 1 and 2 describe that it is necessary to smooth the floor slab surface with a non-landing adjusting material such as resin mortar.

JP-A-2009-256505 Patent No. 5323980 Japanese Unexamined Patent Publication No. 2011-157772 Japanese Unexamined Patent Publication No. 2005-344341 Japanese Unexamined Patent Publication No. 2008-57119

Structure construction management procedure (July 2017) III-95-97 The 72nd Annual Scientific Lecture Meeting of the Japan Society of Civil Engineers (September 2017) CS7-006

The present invention is to provide a floor slab waterproof structure which is excellent in adhesiveness to a floor slab, can adjust unevenness, and can be constructed in a short time, and provides a method for manufacturing the same.

By providing an impregnable radical reaction-curable acrylic resin layer and a non-landing adjustment layer on the concrete deck, the present inventors have excellent adhesiveness, can adjust the non-landing, and can be cured in a short time. It is possible to obtain a floor slab waterproof structure.

Preferred embodiments of the present invention are as follows.
Aspect 1:
A floor slab waterproof structure in which a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete deck.
A floor slab waterproof structure in which the primer composition has an impregnating function and contains a radical reaction-curable acrylic resin.
Aspect 2:
The floor slab waterproof structure according to aspect 1, wherein the primer composition hardening layer and the non-landing adjustment layer are sequentially provided on the concrete floor slab.
Aspect 3:
The floor slab waterproof structure according to aspect 1, wherein a waterproof layer is further provided on the concrete floor slab.
Aspect 4:
The floor slab waterproof structure according to aspect 3, wherein the primer composition hardening layer, the non-landing adjustment layer, and the waterproof layer are sequentially provided on the concrete floor slab.
Aspect 5:
The floor slab waterproof structure according to any one of aspects 1 to 4, wherein the non-land adjusting layer is made of a resin mortar.
Aspect 6:
The floor slab waterproof structure according to aspect 5, wherein the resin used for the resin mortar is a radical reaction-curable acrylic resin.
Aspect 7:
The floor slab waterproof structure according to any one of aspects 1 to 4, wherein the non-land adjusting layer is composed of a polymer cement mortar.
Aspect 8:
The floor slab waterproof structure according to any one of aspects 3 to 7, wherein the waterproof layer is composed of a resin coating film waterproof layer.
Aspect 9:
The floor slab waterproof structure according to aspect 8, wherein the resin coating film waterproof layer is made of a radical reaction-curable acrylic resin.
Aspect 10:
The floor slab waterproof structure according to aspect 9, wherein the radical reaction-curable acrylic resin contains urethane acrylate having a structure derived from polycarbonate polyol.
Aspect 11:
The elongation of the resin coating waterproof layer composed of the radical reaction-curable acrylic resin is larger than the elongation of the primer composition cured layer having an impregnating function and containing the radical reaction-curable acrylic resin. 10. The floor slab waterproof structure according to 10.
Aspect 12:
The floor slab waterproof structure according to any one of aspects 3 to 11, wherein an asphalt coating film-based pavement adhesive layer is provided on the waterproof layer.
Aspect 13:
The floor slab waterproof structure according to aspect 12, wherein the aggregate is contained in the pavement adhesive layer.
Aspect 14:
A method for manufacturing a floor slab waterproof structure in which a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete floor slab.
A method for manufacturing a floor slab waterproof structure including the following two steps.
Step A) A step of applying a primer composition containing a radical reaction-curable acrylic resin having an impregnation function and curing the primer composition to obtain a cured layer of the primer composition, and a step B) applying a resin for forming a non-landing adjustment layer. , The process of curing to obtain a non-landing adjustment layer.
Aspect 15:
The floor slab waterproof structure according to aspect 14, further comprising a step of applying a resin forming a resin coating film waterproof layer on the layer obtained in the step A or B and curing the resin to obtain a resin coating film waterproof layer. How to make a body.
Aspect 16:
The method for producing a floor slab waterproof structure according to aspect 14 or 15, wherein the non-landing adjustment layer is composed of a resin mortar, and the resin used for the resin mortar is a radical reaction-curable acrylic resin.
Aspect 17:
The method for producing a floor slab waterproof structure according to any one of aspects 15 or 16, wherein the time from the start of application of the primer composition to the acquisition of the resin coating film waterproof layer is within 3 hours.
Aspect 18:
A method for manufacturing a floor slab waterproof structure in which a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete floor slab.
A method for manufacturing a floor slab waterproof structure including the following two steps.
A) A step of applying a primer composition containing a radical reaction-curable acrylic resin having an impregnation function to obtain a cured layer of the primer composition, and
B) A step of applying a resin for forming a non-landing adjustment layer containing a radical reaction curing type acrylic resin on the obtained primer composition cured layer to obtain a non-landing adjusting layer.
Aspect 19:
The production of the floor slab waterproof structure according to aspect 18, which comprises a step of applying a resin forming a resin coating film waterproof layer on the layer obtained in the step A or B to obtain a resin coating film waterproof layer. Method.
Aspect 20:
The method for manufacturing a floor slab waterproof structure according to any one of aspects 14 to 19, wherein the step A is carried out on a concrete floor slab, and the step B is carried out on the layer obtained in the step A.
Aspect 21:
A primer composition used in the method for producing the floor slab waterproof structure according to any one of aspects 1 to 13 or the floor slab waterproof structure according to any one of aspects 14 to 20.
A primer composition having an impregnation function and containing a radical reaction-curable acrylic resin.
Aspect 22:
Radical reaction curing used as a resin for forming a non-land adjusting layer in the method for producing a floor slab waterproof structure according to any one of aspects 1 to 13 or the floor slab waterproof structure according to any one of aspects 14 to 20. Mold acrylic resin.

The floor slab waterproof structure of the present invention has excellent adhesiveness of the floor slab, can adjust non-landing, and can be cured in a short time.

It is schematic cross-sectional view which shows one aspect of the floor slab waterproof structure of this invention. It is schematic cross-sectional view which shows another aspect of the floor slab waterproof structure of this invention.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings as the case may be. However, the following embodiments are examples for explaining the present disclosure, and are not intended to limit the present disclosure to the following contents. Unless otherwise specified, the positional relationship such as top and bottom shall be based on the positional relationship shown in the drawings. The dimensional ratio of each element is not limited to the ratio shown in the drawings.

The floor slab waterproof structure of the present invention is a floor slab waterproof structure in which a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete floor slab. A pavement layer may be present on top of the primer composition hardened layer, non-land conditioning layer, waterproof layer, or adhesive layer.

[Concrete deck]
A concrete deck generally means a concrete deck for transmitting the weight of a vehicle or train passing over a bridge to a bridge girder or a pier, but in the present specification, a rising portion of an end, a foundation member using concrete. Include. The concrete deck is, for example, a reinforced concrete deck (RC deck), a prestressed concrete deck (PC deck), and a synthetic deck having a composite structure of steel and concrete.

The upper surface of the concrete deck may be in an untreated state after curing the concrete, or may be surface-treated such as polishing. In addition, a floor slab may be used in which the pavement is removed for repair after the pavement is once paved. The surface of the floor slab at the time of repair may have irregularities (non-landing) due to the pavement cutting tool, cracks, cross-section repair material, asphalt emulsion remaining, old waterproof layer remaining, and the like. The surface of the deck may be dry or moist.

[Primer composition cured layer]
The layer obtained by curing the primer composition is called a primer composition cured layer. In the present invention, the cured layer of the primer composition may be referred to as a primer layer.
The primer composition cured layer may be present above or below the non-landing conditioner layer, but the position of the primer composition cured layer is preferably below the non-landing conditioner layer.
The primer composition can be impregnated into the concrete deck and / or the non-landing adjustment layer. The primer composition contains a radical reaction-curable acrylic resin.

The radical reaction-curable acrylic resin layer has excellent adhesiveness to the non-landing adjustment layer.
The radical reaction-curable acrylic resin layer cures in a short time without using the acceleration of curing by heating. The radical reaction-curable acrylic resin layer itself has excellent curability, and by covering it with a non-land adjusting layer, curing inhibition by oxygen does not occur, so that the curability is further improved.

By using the primer layer, in addition to exhibiting waterproofness, it is possible to increase the surface strength of the concrete deck and the adhesive strength with the layer to be subsequently applied. The primer layer has an impregnation function.
Here, the impregnation function indicates that any one of the impregnation depth measured by the NEXCO test method 426, the viscosity at 23 ° C. before curing, and the tensile strength improving performance of the concrete deck surface is in the following range. The measuring method is as described above.
The primer layer is preferably impregnated with an impregnation depth of 10 mm or more, for example, 10 to 100 mm, 20 to 100 mm, and a bending strength of 1.0 N / mm ² or more, for example, 2.0 N /, as measured by the NEXCO test method 426. It is preferable to have mm ^{2 or more.}

The primer resin forming the primer layer may have a viscosity at 23 ° C. of 3000 to 10 cP, preferably 1000 to 10 cP, for example, 500 to 10 cP, particularly 100 to 10 cP, before curing.
The primer layer may be a primer whose tensile strength is improved by 0.5 N / mm ² or more after being applied to concrete having a surface tensile strength of ^{less than 2.0 N / mm 2} and cured by 0.3 kg / m ^2.

The coating amount of the primer resin, 0.05~1.0kg / ^{m 2,} may be preferably 0.1~0.5kg / ^{m 2,} for example 0.15~0.3kg / ^{m 2.}

[Non-land adjustment layer]
There is a non-land adjustment layer. By the presence of the non-land adjustment layer, waterproofness is exhibited, and it is possible to prevent the waterproof layer from accumulating in the recess due to unevenness, and the amount of the waterproof layer used can be reduced. In addition, it prevents the strength of the deck from decreasing and the waterproof layer from penetrating due to the running load on the convex portion of the deck and the stress at the time of rolling the asphalt mixture.

The material for forming the non-land adjusting layer (non-land adjusting material) may be cement mortar, polymer cement mortar, resin mortar, or the like, and polymer cement mortar or resin mortar is preferable. The polymer cement mortar is a mortar obtained by mixing a polymer dispersion (or a re-emulsified powder resin) with cement and an aggregate. Resin mortar is composed of synthetic resin and aggregate. In the present invention, when the term "resin mortar" is used, it means a non-landing adjusting material using the resin mortar or a non-landing adjusting layer formed of the resin mortar.

The mass ratio of the aggregate in the resin mortar may be 50 to 95%, preferably 70 to 90%, from the viewpoint of ease of construction, compression and / or bending strength. When the mass ratio of the aggregate is appropriate, the simplicity of construction, compression and / or bending strength are improved.
The aggregate consists of stone, sand, inorganic powder and the like, preferably containing silica sand and / or calcium carbonate. The silica sand may be No. 3 to No. 8, preferably No. 4 to 6, and more preferably No. 5. The average particle size or median diameter of calcium carbonate may be 0.5 to 300 μm, preferably 1 to 200 μm, and more preferably 10 to 100 μm.
When both silica sand and calcium carbonate are used, the volume ratio of silica sand may be 40-99%, preferably 60-95%, more preferably 70-95%.

Examples of resins in polymer dispersions and synthetic resins are radical reaction curable acrylic resins, epoxy resins, polyurethane resins, unsaturated polyester resins, water-based acrylic resins, water-based polyurethane resins, water-based epoxy resins, and water-based EVA resins, which will be described later. From the viewpoint of waterproof function, adhesiveness, and realization of short-time construction, a radical reaction-curable acrylic resin is preferable.
The resin mortar may be manufactured by mixing the resin and the aggregate in advance, or the resin and the aggregate may be present on the construction surface first and then the other may be added to the floor. It may be produced on a plate or a primer layer.

The amount of non-land adjusting material used depends on the non-land condition. Sufficient amount can be used according to the condition to smooth the road surface. Obtain the average depth by the sand patching method described in the Pavement / Survey and Test Method Handbook (Nippon Road Association), and use a non-landing adjustment material so that it is 0.5 to 1.3 times this average depth. Is preferable.

[Waterproof layer]
The waterproof layer is not particularly limited as long as it is a waterproof layer having a waterproof function formed above the concrete deck.
Examples of the waterproof layer include a resin coating waterproof layer, a heated asphalt coating waterproof layer, an asphalt sheet waterproof layer, and an asphalt urethane waterproof layer. Among them, the resin coating waterproof layer may be used from the viewpoint of improving waterproofness and adhesiveness. preferable. The resin (waterproof material) forming the waterproof layer may be, for example, an acrylic radical curable resin, a two-component urethane resin, or a one-component urethane resin. Acrylic radical curable resins are preferable because their curability is easily controlled even from low temperature to high temperature, they can be cured in a short time, and they are excellent in water impermeability.

Since the resin coating waterproof layer follows the cracks of the concrete deck, the crack followability is 0.3 mm when only the waterproof layer is applied on the mortar and the crack followability test in the road bridge deck waterproof handbook is carried out. It is preferably 0.5 mm or more, and more preferably 0.5 mm or more. In order to exhibit such crack followability, the resin coating film waterproof layer preferably satisfies the following elongation and / or tensile strength. That is, when a cured film having a thickness of 200 μm is formed into a dumbbell-shaped No. 1 type (JIS K 6251) and a tensile test is performed at −10 ° C. in accordance with JIS K 7161-1: 2014 “Plastic-How to determine tensile properties”. The elongation may be 10% or more, preferably 50% or more, and more preferably 100% or more. Further, the breaking stress at the time of performing the same test may be 10 MPa or more, preferably 30 MPa or more, and more preferably 50 MPa or more.

The thickness of the resin coating film waterproof layer is excellent in adhesiveness and excellent in coating film characteristics (mechanical characteristics, water impermeability), so that it can be made into a thin film, preferably 0.1 to 2.0 mm. 0.3 to 1.5 mm is more preferable, and 0.5 to 1.2 mm is particularly preferable.

[Adhesive layer]
In order to improve the adhesiveness between the deck and the asphalt pavement, an adhesive layer can be provided in the final process of manufacturing the deck waterproof structure. This adhesive layer may also be called a pavement adhesive layer.
This pavement adhesive layer exists above any of the primer layer, the non-land adjustment layer, and the waterproof layer, and exists under the asphalt pavement. The pavement adhesive layer is preferably a hot melt type material that is melted by heat during asphalt pavement paving to enhance the adhesive effect. Examples of the hot melt type material include asphalt type and thermoplastic resin type. Aggregate may be present in or on the adhesive layer in order to increase the strength of the adhesive layer and prevent the adhesive layer from adhering to the construction machine or the construction worker.

Examples of the asphalt-based adhesive layer include a heat-melted asphalt coating film, an asphalt sheet, and an asphalt layer derived from an asphalt emulsion. As a raw material for the heat-melted asphalt layer, straight asphalt, modified asphalt, heat-melted asphalt waterproof material, and the like can be used. As the asphalt sheet, a sheet in which asphalt is impregnated in a non-woven fabric or a mesh, an asphalt roofing sheet, an asphalt sheet used in the asphalt sheet pouring method, or the like can be used. The asphalt layer derived from the asphalt emulsion is an asphalt layer obtained by drying and solidifying the asphalt emulsion. That is, the asphalt layer is an evaporation residue of the asphalt emulsion. The "origin" means, for example, that the raw material of the asphalt layer is an asphalt emulsion. Since the asphalt emulsion can improve the adhesiveness between the primer layer, the resin mortar, or the waterproof layer of the resin coating film and the asphalt layer, the degree of needle penetration at a temperature of 25 ° C. of the evaporation residue is 100 (unit 1/10 mm). Hereinafter, it is preferably 1 to 100, more preferably 2 to 50, and particularly preferably 5 to 30. The asphalt emulsion is defined in the petroleum asphalt emulsion of JIS K2208: 2000, and the degree of needle insertion of the evaporation residue at a temperature of 25 ° C. is JIS K2208: 2000 6.13 needle insertion of the evaporation residue. It is measured according to the degree test method.

As such an asphalt emulsion, for example, a tire adhesion suppressing type asphalt emulsion (symbol PKM-T) defined in the Japan Asphalt Emulsion Association Standard JEAAS2011, or a modified asphalt emulsion and a decomposing agent conforming to the PKM-T standard are used. A fast-decomposing asphalt emulsion can be preferably used. Specific product names of asphalt emulsion are, for example, Tuck Fine E manufactured by Toa Road Corporation, Farm Zol manufactured by Nichireki Co., Ltd., Clear Zol manufactured by NIPPO Co., Ltd., Non-stick sol manufactured by Maeda Road Corporation, and Showa Bituminous Industry Co., Ltd. High Tuck AS, Clean Tuck manufactured by Shinreki Co., Ltd., Tuck Fine SQ manufactured by Toa Road Corporation, Super Tuck Zol manufactured by Nichireki Co., Ltd., etc.

The asphalt adhesive layer may contain a resin-based material in addition to the asphalt component, and the resin-based material used in the asphalt layer is made of a resin such as urethane-based, epoxy-based, acrylic-based, or vinyl acetate-based. It contains an adhesive and, in some cases, a cross-linking agent for these resins. The amount of the resin-based material may be 40% by mass or less or 30% by mass or less, for example, 1 to 25% by mass, based on the asphalt layer.
Other additive materials used in the asphalt layer include solvents composed of aliphatic hydrocarbons, aromatic hydrocarbons and the like, aggregates composed of silica and the like, and decomposition accelerators for asphalt emulsions. The amount of the other additive material may be 30% by mass or less or 20% by mass or less, for example, 1 to 15% by mass, based on the asphalt layer.
Examples of the thermoplastic resin include thermoplastic polyolefin, thermoplastic polyester, thermoplastic polyurethane, thermoplastic EVA, and thermoplastic acrylic resin.
The amount of the adhesive layer used may be 0.2 to 2.0 kg / m ² as the mass of the material that can be dried after drying, more preferably 0.4 to 1.5 kg / m 2, and 0.6 to ^{0.5 kg / m 2.} 1.2 kg / m ² is more preferable.

[Aggregate in pavement adhesive layer]
Aggregates in or on the adhesive layer include, for example, sand, silica sand, river sand, cold water stone, emery, marble, calcium carbonate, kaolin, bentonite, mica, talc, silicon carbide powder, silicon nitride powder, boron nitride. Powder, alumina, slag, glass powder, ceramic aggregate, pottery waste, colored aggregate, hollow particles and the like are preferable, and silica sand is more preferable.
The average particle size of the aggregate is preferably 0.6 mm or less (for example, silica sand No. 4 or more), more preferably 0.5 mm or less (for example, silica sand No. 5 or more), and 0.2 mm or less (for example, silica sand No. 5 or more) because of its excellent adhesiveness. It is particularly preferable to use silica sand No. 7 or more) or 0.3 mm or less (for example, silica sand No. 6 or more). The average particle size of the aggregate may be 0.08 mm or more.
The coating amount of the aggregate is excellent in adhesiveness, preferably 0.01 and 2.0 / ^{m 2,} more preferably 0.1~1.3kg / ^{m 2,} 0.2~0.6kg / ^{m 2} is particularly preferable.

[Deck waterproof structure]
The floor slab waterproof structure of the present invention is a floor slab waterproof structure in which a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete floor slab. A pavement layer may be present on top of the primer layer, non-land conditioning layer, waterproof layer, or adhesive layer.

The impregnated primer used for the purpose of repairing microcracks generated by removing existing asphalt pavement in concrete deck bridges has excellent adhesiveness without using a surface modifier, and promotes hardening by heating. No one was known to cure in a short time without use. Since the floor slab waterproof structure of the present invention has excellent adhesion to the floor slab and can be cured in a short time, it is particularly used in the floor slab waterproofing method for bridge repair, which requires an impregnated primer and a non-landing conditioner. Suitable for use.

In the floor slab waterproof structure of the present invention, a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete floor slab. Further, it is preferable that the primer composition hardening layer and the non-landing adjustment layer are provided on the concrete deck in this order.
It is preferable that a waterproof layer is further provided on the concrete deck. It is preferable that the primer composition hardening layer, the non-landing adjustment layer, and the waterproof layer are provided on the concrete deck in this order.
It is preferable that a radical curable acrylic resin (acrylic radical curable resin) is used for both the primer composition and the resin mortar for the non-landing adjustment layer used in the floor slab waterproof structure of the present invention. As a result, even if the next layer is applied while the previous layer is uncured, poor adhesion does not occur at the interface, and the plurality of layers can be quickly applied without being cured. Generally, it is not desirable to apply different types of material resins with the front layer uncured, which may cause poor adhesion at the interface. However, if the radical curable acrylic resins are laminated on the uncured surface, the adhesiveness does not decrease at the interface. For the same reason, in addition to the primer composition and the resin mortar for the non-landing adjustment layer, the resin forming the resin coating film waterproof layer is more preferably a radical curable acrylic resin.

By providing at least a primer composition curing layer and a non-landing adjustment layer, a waterproof function is provided, and by further providing a waterproof layer, the waterproof performance is further improved.
The waterproof function is not limited as long as it has an effect of preventing water from entering the concrete deck, but is evaluated by, for example, the following method.
Wet the upper and lower surfaces of the prepared floor slab waterproof structure, connect the electrodes of the road bridge deck moisture meter HI-100 (Ketsuto Scientific Research Institute, electrical resistance type) to the upper and lower surfaces, and count the value at 23 ° C. To measure. The lower the count value of the moisture meter, the higher the electrical resistance of the floor slab waterproof structure, and it is judged that the waterproof performance is high. In this evaluation method, when it is 320 or less, it is judged to have waterproof performance.

[Acrylic radical curable resin]
The acrylic radical curing resin contains at least one compound having a (meth) acrylate group structure (meaning a compound having an acrylate group structure or a compound having a methacrylate group structure) as a main component, and is subjected to a radical reaction. , A cured product obtained by polymerization and curing. Therefore, this cured resin has a structure derived from a compound having a (meth) acrylate group structure (hereinafter, may be described as a structure derived from (meth) acrylate, and a structure derived from a compound having a methacrylate group structure is a structure derived from methacrylate. , A compound having an acrylate group structure may be described as an acrylate-derived structure).

A compound having a (meth) acrylate group structure (hereinafter, it may be referred to as a (meth) acrylate compound, a compound having a methacrylate group structure may be referred to as a methacrylate compound, and a compound having an acrylate group structure may be referred to as an acrylate compound). The term is not particularly limited as long as it is a compound having one or more (meth) acrylate group structures in the molecular structure (monofunctional (meth) acrylate compound or polyfunctional (meth) acrylate compound). It is preferable that a methacrylate compound is contained because it is excellent in heat resistance and toughness of the coating film. Further, it is preferable that the radical reaction is started by a radical generated by decomposition of a peroxide or the like.

[Acrylic radical curable resin composition]
The acrylic radical curable resin composition is a composition containing at least one compound having a (meth) acrylate group structure and can be cured by a radical reaction. This acrylic radical curable resin composition is generally in a liquid state and is cured to give the above-mentioned acrylic radical curable resin. Although not particularly limited, the acrylic radical curable resin composition may contain a curing agent, a curing catalyst and other additives as other components. Other additives include curing aids, curing catalysts, flame retardants, heat stabilizers, antioxidants, lubricants, pigments, fillers, rheology control agents, tackifiers, solvents and reactive diluents. The acrylic radical curable resin composition is a primer layer for the floor slab waterproof structure, a resin mortar, a resin composition for forming a resin coating waterproof layer, or a primer layer in a method for producing a floor slab waterproof structure described later. , Resin mortar, and a resin composition for forming a resin coating waterproof layer.

<Urethane (meth) acrylate>
Since the acrylic radical curable resin has excellent toughness, adhesiveness to a layer containing another acrylic radical curable resin, and adhesiveness to an asphalt layer, urethane (meth) acrylate-derived structure is used as a urethane (meth) acrylate-derived structure. It is preferable to have a structure derived from meta) acrylate, and it is more preferable to have a structure derived from urethane methacrylate having a methacrylic group because it is excellent in heat resistance.
The "urethane (meth) acrylate" means a urethane acrylate having a (meth) acrylic group, particularly a urethane acrylate having a (meth) acrylic group at the molecular terminal. "(Meta) acrylic" means acrylic and / or methacryl.
The urethane (meth) acrylate has a polyol partial structure (a), a polyisocyanate partial structure (b), and a (meth) acrylate partial structure (c). Therefore, when urethane (meth) acrylate is used in the acrylic radical curable resin composition, the acrylic radical curable resin has at least a structure derived from (meth) acrylate, a structure derived from polyol, and a structure derived from polyisocyanate. It will be.

(Structure derived from polyol)
The structure derived from the polyol is not particularly limited as long as it contains two or more hydroxyl groups. The polyol compound used in producing the structure derived from the polyol is an aliphatic diol, an alicyclic diol, an aromatic diol, a polyfunctional polyol, a polyether polyol, a polyester polyol, a polycarbonate polyol, a polyester polycarbonate polyol, or a polyether polyester. Examples thereof include an oligomer polyol having a repeating unit in the structure such as a polyol and a polyether polycarbonate polyol, and a monomer polyol having no repeating unit. Of the above-mentioned polyol compounds, it is preferable to use a polycarbonate polyol.

Since a tough coating film can be obtained in the primer layer, the resin mortar, and the resin coating film waterproof layer, it is preferable to have a structure derived from a polycarbonate polyol, and since it is excellent in flexibility and storage stability, it is not. It is more preferable to have a structure derived from a crystalline polycarbonate polyol. Although not particularly limited, a structure derived from a polycarbonate polyol can be preferably used as a structure derived from a urethane (meth) acrylate polyol.

(Structure derived from polycarbonate polyol)
The structure derived from the polycarbonate polyol used as the structure derived from the polyol means, for example, a partial structure of the molecular structure of the polycarbonate polyol other than the bonding group involved in the urethanization reaction or the like. Polycarbonate polyols have a polyol-derived structure, optionally a lactone-derived structure, and a carbonate bond. Polycarbonate polyols are obtained, for example, by reacting a polyol with a carbonic acid ester in the presence of a catalyst.

The diols that make up the polycarbonate polyol are of the formula:
HO-R ^1- OH
[In the formula, R ¹ contains an ether bond in a divalent hydrocarbon group having 2 to 22 carbon atoms or a part thereof]
It is preferably a hydrocarbon group-containing diol represented by, and may have an ether bond in a part thereof.

In the hydrocarbon group-containing diol, the divalent hydrocarbon group may be a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 2 to 22 carbon atoms. The hydrocarbon group may be aliphatic, aromatic or aromatic aliphatic, but is preferably an aliphatic hydrocarbon group. Linear aliphatic hydrocarbon groups are more preferred. The hydrocarbon group may have 3 to 16, preferably 4 to 12, particularly 4, 5, 6 or 8.

The primer layer, resin mortar, and resin coating waterproof layer are easy to control curability even from low temperature to high temperature, can be cured in a short time, have excellent water shielding properties, and at the same time have adhesiveness to the asphalt layer. An acrylic radical-curable resin having a structure derived from urethane (meth) acrylate having a polycarbonate polyol as a partial structure is preferable because a tough coating film can be obtained.
The polycarbonate polyol-based urethane (meth) acrylate is not particularly limited, but has a structure derived from polycarbonate polyol, a structure derived from polyisocyanate, and a structure derived from (meth) acrylate. Further, the structure derived from the polycarbonate polyol preferably has a structure derived from an amorphous polycarbonate polyol and / or a structure derived from a polycarbonate polyol containing two or more kinds of repeating units.
Further, it is preferable that the polycarbonate polyol is a polycarbonate diol. This polycarbonate diol-based urethane (meth) acrylate may also be referred to as polycarbonate diol-urethane (meth) acrylate or PCD-UA.

(Structure derived from polyisocyanate)
The structure derived from polyisocyanate means, for example, a partial structure of the molecular structure of polyisocyanate other than the groups involved in the urethanization reaction.
The structure derived from polyisocyanate is introduced into urethane (meth) acrylate by polyisocyanate.
As the polyisocyanate, bifunctional or higher functional isocyanates can be used, but diisocyanates are preferable.

Diisocyanate is the formula:
OCN-R ^2- NCO
[In the formula, R ² is a divalent hydrocarbon group having 2 to 20 carbon atoms. ]
It is preferably a compound represented by.

The divalent hydrocarbon groups are a linear aliphatic hydrocarbon group having 2 to 12 carbon atoms, a branched aliphatic hydrocarbon group having 3 to 12 carbon atoms, and a cyclic aliphatic hydrocarbon having 6 to 18 carbon atoms. It may be a hydrogen group or an aromatic hydrocarbon group having 6 to 18 carbon atoms. A linear aliphatic hydrocarbon group and a cyclic aliphatic hydrocarbon group are preferable because they are excellent in weather resistance, and aromatic hydrocarbons are particularly preferable because a high-strength coating film can be obtained.

The polyisocyanate may be used alone or in combination of two or more. Part or all of the structure of the polyisocyanate may be derivatized, such as isocyanurate, carbodiimide, or biuret. Among them, isophorone diisocyanate and 4,4'-methylenebiscyclohexyldiisocyanate are preferable because they are excellent in weather resistance, and 2,4-toluene diisocyanate and 2,6-triisocyanate are obtained because a particularly high-strength coating film can be obtained. Range isocyanate, diphenylmethane-4,4'-diisocyanate, is preferable. Further, in order to preferably produce urethane acrylate, those having an asymmetric structure are preferable, and examples thereof include isophorone diisocyanate and 2,4-tolylene diisocyanate.

(Structure derived from (meth) acrylate)
The structure derived from (meth) acrylate is the molecular structure of the part other than the group involved in the urethanization reaction in urethane (meth) acrylate, and the part other than the group involved in the radical reaction in addition to them in the acrylic radical curable resin. Indicates the molecular structure of.
That is, in the following formula (1), the group other than Y represents "the molecular structure of the portion other than the group involved in the urethanization reaction".

R ³ indicates that it is a hydrogen atom or a methyl group. Y represents a group involved in the urethanization reaction. R ⁴ represents a hydrocarbon group.

The structure derived from the (meth) acrylate to the urethane (meth) acrylate is introduced into the urethane (meth) acrylate by the (meth) acrylate. For the introduction of the structure derived from the (meth) acrylate into the urethane (meth) acrylate, a (meth) acrylate having a hydroxyl group, a (meth) acrylate having an isocyanato group, or the like can be used, but a hydroxyl group that reacts with an isocyanate is used. (Meta) acrylate having is preferable.

((Meta) acrylate compound having a hydroxyl group)
Since the acrylic radical curable resin is excellent in adhesiveness to a layer containing another acrylic radical curable resin and to an asphalt layer, it may have a structure derived from a (meth) acrylate compound having a hydroxyl group. It is preferable to have a structure derived from a methacrylate compound having a hydroxyl group because it is excellent in heat resistance.

The (meth) acrylate compound having a hydroxyl group is a (meth) acrylate compound having one or more hydroxyl groups. Specific examples of the (meth) acrylate compound having a hydroxyl group include hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxypentyl (meth) acrylate, hydroxyhexyl (meth) acrylate, and hydroxy. Monofunctional (meth) acrylate having a hydroxyl group such as (heptyl) methacrylate and hydroxyoctyl (meth) acrylate;
Pentaerythritol tri (meth) acrylate, pentaerythritol di (meth) acrylate, trimethylolpropandi (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol tetra (meth) Examples include polyfunctional (meth) acrylates having hydroxyl groups such as acrylate, dipentaerythritol tri (meth) acrylate, dipentaerythritol di (meth) acrylate, ditrimethylol propantri (meth) acrylate, and ditrimethylol propandi (meth) acrylate. Be done.

((Meta) acrylate compound having a branched structure)
The acrylic radical curable resin has a structure derived from a (meth) acrylate compound having a branched structure because it is excellent in adhesiveness to a layer containing another acrylic radical curable resin and adhesiveness to an asphalt layer. Is preferable, and since it is excellent in heat resistance, it is more preferable to have a structure derived from a methacrylate compound having a branched structure.

The (meth) acrylate compound having a branched structure is a (meth) acrylate compound having a branch in the aliphatic hydrocarbon structure. Incidentally, the aliphatic hydrocarbon structure contained in R ⁴ in the formula (1).

((Meta) acrylate compound having a ring structure)
The acrylic radical-curable resin has a structure derived from a (meth) acrylate compound having a ring structure because it is excellent in adhesiveness to a layer containing another acrylic radical-curable resin and adhesiveness to an asphalt layer. Is preferable, and since it is excellent in heat resistance, it is more preferable to have a structure derived from a methacrylate compound having a branched structure. The (meth) acrylate compound having a ring structure is a (meth) acrylate compound having a ring in the aliphatic hydrocarbon structure. A (meth) acrylate compound having a condensed ring is preferable because it is excellent in curability, and an acrylate compound having a condensed ring is more preferable because it is excellent in heat resistance.
In particular, the condensed ring-containing (meth) acrylate compound is excellent in curability in air, and therefore the condensed ring preferably has a reactive double bond. Therefore, the fused ring-containing (meth) acrylate is preferably dicyclopentenyl (meth) acrylate and / or dicyclopentenyloxyethyl (meth) acrylate.

The acrylic radical curable resin has a structure derived from the above-mentioned urethane (meth) acrylate, a structure derived from a (meth) acrylate compound having a hydroxyl group, a structure derived from a (meth) acrylate compound having a branched structure, and a ring structure (meth). It is preferably at least one selected from the structures derived from the acrylate compound, and is derived from a (meth) acrylate compound having a structure derived from urethane (meth) acrylate, a structure derived from a (meth) acrylate compound having a hydroxyl group, and a ring structure. Structural combinations are more preferred.
Further, by including the (meth) acrylate compound having a hydroxyl group in the acrylic radical curable resin composition, the odor of the resin composition can be reduced. Further, by containing the (meth) acrylate compound having a ring structure, the curability of the coating film surface when the resin composition is cured is further enhanced.
The blending ratio of the (meth) acrylate compound is not particularly limited, but since a low-viscosity solution can be obtained at the time of blending, the other (meth) acrylate compounds are 1 to 400 parts by mass with respect to 100 parts by mass of the urethane (meth) acrylate. It is preferably parts by mass, more preferably 10 to 300 parts by mass, and even more preferably 30 to 200 parts by mass.

<Hardener>
As the acrylic radical curable resin composition, it is preferable to use a curing agent that initiates the reaction by radicals. As the curing agent, a peroxide is preferable, and an organic peroxide is more preferable because it can be cured at room temperature and a sufficient pot life can be obtained.

<Curing catalyst>
In the acrylic radical curable resin composition, it is preferable to use a curing catalyst for the purpose of controlling the curing reaction in addition to the curing agent. Examples of the curing catalyst include organic metal salts such as zinc naphthenate, cobalt naphthenate, tin octylate, cobalt octylate, bisacetylacetonate cobalt (II) and trisacetylacetonate cobalt (III); imidazoles and derivatives thereof; Organic phosphorus compounds such as phosphines and phosphonium salts; examples thereof include secondary amines, tertiary amines and quaternary ammonium salts. These may be used alone or in combination of two or more. The curing catalyst is preferably cobalt naphthenate or cobalt octylate because it has excellent storage stability and curability.
The amount of the curing catalyst is preferably 0.01 to 3 parts by mass, more preferably 0.05 to 1.5 parts by mass, and 0.1 to 1 part by mass with respect to 100 parts by mass of the total of the (meth) acrylate compound. Is even more preferable. When the content of the curing catalyst is within the above range, the curing promoting effect and the storage stability tend to be excellent.

<Wax>
The acrylic radical curable resin composition preferably contains wax because it provides a cured resin having excellent shear adhesion to the asphalt layer and excellent surface curability. As such waxes, animal waxes, vegetable waxes, mineral waxes, petroleum waxes, synthetic waxes, waxes containing and / or modifying them are preferable, and modified waxes and paraffin waxes are more preferable.

<Other additives>
Other additives include curing accelerators (amines), defoaming agents, wet dispersants, surfactants, rheology control agents, flame retardants (phosphorus flame retardants, halogen flame retardants, aluminum hydroxide, hydroxides). Magnesium, antimony flame retardant), heat stabilizer, light stabilizer, antioxidant (hindered phenol compound, hindered amine compound, thioether compound), lubricant (talc, silica, polyethylene wax, paraffin wax, etc.), pigment (titanium dioxide) , Calcium carbonate, zinc oxide, etc.), fillers (inorganic compounds (calcium carbonate, barium sulfate, silica, clay, talc), organic compounds (eg, organic resins, cellulose)), tackifiers, solvents, reactive diluents Can be mentioned. By using a rheology control agent, workability at the rising part of the edge of the deck is improved.
The amount of other additives may be 0 to 20% by mass, for example 0.1 to 10% by mass, based on the total amount of the curable resin composition.

[Form of curable resin composition]
Although not particularly limited, the curable resin composition (for example, acrylic radical curable resin composition) serving as a coating material for forming the primer layer, the resin mortar, and the resin coating waterproof layer does not need to be mixed. A certain one-component type may be used, and a two-component mixed reaction type curable resin composition is preferable because it can be adjusted by external factors such as storage stability and weather at the time of curing. In the case of the two-component mixed reaction type, for example, the solution A contains a (meth) acrylate compound and a curing catalyst and the solution B contains a curing agent, or the solution A contains a (meth) acrylate compound and a curing catalyst and the solution B contains a (meth) acrylate compound and a curing catalyst. May contain (meth) acrylate compounds and curing agents. The former is excellent in safety because the liquid B does not contain a reactive compound other than the curing agent, and the latter is excellent in workability at the time of mixing because the mixing ratio of the liquid A and the liquid B can be arbitrarily set. Excellent. In addition, other components may be blended in either liquid A or liquid B. The above-mentioned curable resin composition may be composed of a third component other than the liquid A and the liquid B.

[Characteristics of curable resin composition]
The curable resin composition is not particularly limited, but as a polycarbonate polyol-based urethane (meth) acrylate, the structure derived from the polycarbonate polyol is a structure derived from an amorphous polycarbonate polyol (a-1). Since it has a structure (a-2) derived from a polycarbonate polyol containing two or more kinds of repeating units, the storage stability is significantly improved as compared with the conventional polycarbonate polyol-based urethane (meth) acrylate. ..

[Manufacturing method of curable resin composition]
The curable resin composition (liquid A and liquid B) can be produced by a method usually used by those skilled in the art. Liquids A and B contain the components of liquids A and B, respectively, in, for example, a reaction tank, a blend tank, a disper, a ball mill, and S.A. G. It can be prepared by mixing with a mill, a roll mill, a planetary mixer or the like.

[Curing method of curable resin composition]
The primer layer, resin mortar, and resin coating waterproof layer can be obtained, for example, by applying the above-mentioned curable resin composition on a base material such as a concrete floor slab, and polymerizing and curing the layer to obtain a cured product. Curing can be performed by radical reaction with peroxide, photoreaction by irradiation with active energy rays, application of thermal reaction by heating, etc., but especially when a curing agent or curing catalyst is added, they should be mixed. Since it can be cured by a radical reaction at room temperature (outside temperature or room temperature, for example, −10 to 30 ° C.), it is preferable as a primer layer for floor slab waterproofing, a resin mortar, and a resin coating waterproof layer.

[Characteristics of primer layer and resin coating film waterproof layer (curing resin)]
Since the primer layer and the resin coating film waterproof layer contain, for example, a polycarbonate polyol-based urethane (meth) acrylate component, they have the following characteristics.

The elongation at break (in the tensile test at 23 ° C.) of the cured product of the primer layer and the resin coating film waterproof layer (cured resin) is not particularly limited, but is 45% or more, for example 60% or more, particularly 80%. As mentioned above, 100% or more is particularly preferable, and 130% or more is particularly preferable. Within this range, since it has sufficient elongation, it can be suitably used as a resin for civil engineering and construction such as waterproofing of floor slabs.

[aggregate]
The aggregate used for the floor slab waterproof structure is used between the asphalt layer and the resin coating waterproof layer to improve the wettability when applying the asphalt emulsion and to suppress the adhesion of asphalt components to paved vehicles and pedestrians. , It is preferable to have it in the asphalt layer. As the method of applying the aggregate, the method of spraying the aggregate after applying (or curing) the waterproof layer and before applying the asphalt emulsion, the method of mixing the aggregate with the asphalt emulsion in advance and then applying the aggregate, and the method of applying the aggregate after applying the asphalt emulsion. A method of spraying the material can be mentioned. In particular, it is preferable that the asphalt emulsion has at least a partial aggregate in the asphalt emulsion while it is not dried, so that the asphalt layer can be easily applied even if wax is used to enhance the curability of the waterproof layer. The effect of being able to do it is obtained. Further, it is preferable to spray the aggregate after applying the waterproof layer (preferably after curing) and before applying the asphalt emulsion, and it is possible to effectively improve the wettability at the time of applying the asphalt emulsion. ..

[Pavement layer]
The pavement layer paved on the floor slab waterproof structure of the present invention is generally formed of asphalt and aggregate. Asphalt includes, for example, natural asphalt such as lake asphalt, rock asphalt, and asphaltite, petroleum asphalt such as straight asphalt and blown asphalt, semi-blown asphalt, hard asphalt, and thermosetting resin, thermoplastic resin, rubber, etc. It also includes modified asphalt.

[Manufacturing method of floor slab waterproof structure]
The floor slab waterproof structure of the present invention is manufactured by a method including the following steps A and B. Here, the order of A and B may be reversed, but it is preferable that step B is carried out after step A. It is more preferable that the manufacturing method includes steps C and / or step D after performing steps A and B on the concrete deck. When step D is included, step D is the final step.

Step A):
A step of applying and curing a primer composition containing a radical reaction-curable acrylic resin having an impregnation function to obtain a cured layer of the primer composition, and step B):
A process of applying a resin that forms a non-landing adjustment layer and curing it to obtain a non-landing adjusting layer.

Here, when a resin mortar is used for the non-landing adjustment layer, the resin composition and the aggregate may be mixed in advance for construction, or the resin composition may be placed on the construction surface after the aggregate is first placed on the construction surface. The resin mortar may be formed on the construction surface by entwining, or the resin mortar may be formed on the construction surface by first arranging the resin composition on the construction surface and then applying the aggregate from above. Good.
Further, the description of each step when the step B is carried out after the step A is as follows.
Step A):
A step of applying a primer composition containing a radical reaction-curable acrylic resin having an impregnating function onto a concrete floor plate and curing the primer composition to obtain a cured layer of the primer composition.
Step B):
A step of applying a resin for forming a non-landing adjustment layer to the cured layer of the primer composition obtained in the step A) and curing the layer to obtain a non-landing adjusting layer.

Process C):
A step of applying a resin forming a resin coating film waterproof layer on the layer obtained in the step A or B and curing the resin to obtain a resin coating film waterproof layer.
Step D):
A step of applying an adhesive layer on the layer obtained in the steps A, B or C.

Here, when the adhesive layer contains an aggregate, the adhesive layer and the aggregate may be mixed in advance for construction, or the adhesive layer may be constructed from above after the aggregate is first placed on the construction surface. Then, the aggregate may be applied from above after the adhesive layer is first placed on the construction surface.

It is preferable that the non-landing adjustment layer is composed of a resin mortar, and the resin used for the resin mortar is a radical reaction-curable acrylic resin. Thereby, waterproofness and adhesive strength can be improved.
When the resin used in the primer composition curing layer, the non-landing adjustment layer and the waterproof layer is an acrylic resin, the resin that forms the non-landing adjustment layer without requiring curing after applying the primer composition can be obtained. It is preferable because it can be applied. In addition, it is more preferable that the resin coating film waterproof layer is also an acrylic resin for the same reason.
The time from the start of the first step to the acquisition of the cured layer in the final step by steps A and B and, if necessary, C can be within 3 hours.

Although not particularly limited, a curable resin composition (for example, an acrylic radical curable resin composition) that serves as a paint for forming a primer layer, a non-landing adjustment layer, or a resin coating waterproof layer on a concrete floor slab is used. For construction, it can be applied using a roller, brush, rubber spatula, rake, spray, iron, porcelain, etc., and cured at room temperature.
When an asphalt emulsion is applied as an adhesive layer on the asphalt emulsion, it can be applied using a roller, a brush, a rubber spatula, a rake, a spray, a tank truck equipped with an asphalt distributor, or the like, and dried at room temperature to obtain an asphalt layer. In this case, since heating or the like is not required, it is economically efficient, and since a roller, a brush, a rubber spatula, a rake, a spray or the like is used, no special technique is required and the coating can be applied in a short time. When using an asphalt emulsion, if necessary, by spraying aggregate on the resin coating film waterproof layer, even if wax is used to improve the curability of the waterproof layer, etc., the material of the adhesive layer The effect that the asphalt emulsion can be easily applied can be obtained. When heat-melted asphalt is applied as an adhesive layer, the asphalt taken out from the melting pot can be applied by a rake or the like. When an asphalt sheet is applied as an adhesive layer, heat-melted asphalt or the like can be poured as an adhesive, and if it is a self-adhesive asphalt sheet, it can be applied alone.

<Acrylic radical curing resin>
The acrylic radical curable resin is an acrylic radical curable resin used in the above-mentioned floor slab waterproof structure or the method for manufacturing the above-mentioned floor slab waterproof structure. The acrylic radical curable resin can be suitably used as a raw material for the primer layer, the non-landing adjustment layer, and the waterproof layer of the floor slab waterproof structure.

Hereinafter, preferred embodiments will be specifically described with reference to the accompanying drawings, but the present invention is not limited to the attached drawings.

FIG. 1 is a schematic cross-sectional view showing one aspect of the floor slab waterproof structure of the present invention. The floor slab waterproof structure 10 has a concrete floor slab 1, a primer layer 2, and a non-landing adjustment layer 3 in this order from the bottom.
FIG. 2 is a schematic cross-sectional view showing another aspect of the floor slab waterproof structure of the present invention. In the floor slab waterproof structure 20, in order from the bottom, a concrete floor slab 1, a primer layer 2, a non-land adjustment layer 3, a waterproof layer 4, an adhesive layer 5, and usually a pavement layer 6 are provided on the adhesive layer 5. ..
In FIG. 2, the adhesive layer 5 may contain an aggregate.

The primer layer 2 and the waterproof layer 4 are formed of a curable resin composition. The liquid curable resin composition is cured to become a solid cured product.
The curable resin composition is preferably an acrylic radical curable resin composition. It is preferable that the acrylic radical curable resin composition contains urethane (meth) acrylate.

Hereinafter, the present disclosure will be described in detail with reference to examples, but the present invention is not limited to these examples.
The operation procedure is as follows. Unless otherwise stated, the operation was performed at 23 ° C.

[Tension Adhesion Test]
A 40 x 40 mm tensile adhesive test jig was attached to the upper surface of the created deck waterproof structure with an adhesive, and a 40 x 40 mm notch was made around the surface until it reached the substrate, and then the loading speed was 0. The adhesive strength was determined by pulling in the vertical direction at 1 N / mm ^{2 until the adhesive interface or the concrete substrate was broken.} The destruction position was also recorded.

[Waterproof test]
Wet the upper and lower surfaces of the prepared floor slab waterproof structure, connect the electrodes of the road bridge deck moisture meter HI-100 (Ketsuto Scientific Research Institute, electrical resistance type) to the upper and lower surfaces, and count values at 23 ° C. Was measured. The lower the count value of the moisture meter, the higher the electrical resistance of the floor slab waterproof structure, and it was judged that the waterproof performance was high.

[Measurement of surface roughness (average depth of unevenness)]
Surface roughness of the surface of concrete slab and floor slab waterproof structure (sand patching method) based on "Pavement / Survey Test Method Handbook (Nippon Road Association)" Method for measuring the texture depth of pavement using sand (sand patching method) " The average depth of unevenness) was calculated.

[Continuous workability]
When continuous construction was performed at 0.5 hour intervals from the start of construction of the previous layer to the start of construction of the next layer, the one that could be constructed by the next layer was ○, and the one that could not be constructed by the previous layer was ×. And said.

In the following, the meanings of the abbreviations are as follows.
((Meta) acrylate compound having a hydroxyl group)
HPMA: 2-Hydroxypropyl methacrylate ((meth) acrylate compound having a branched structure)
EHMA: 2-ethylhexyl methacrylate ((meth) acrylate compound having a ring structure)
DCPOEMA: Dicyclopentenyloxyethyl methacrylate (curing agent)
Niper NS: Suspension of benzoyl peroxide with dibutyl phthalate at a concentration of 40%

[Production Example 1] Synthesis of urethane methacrylate (1) In a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, an air inlet and a reflux condenser, 1,6-hexanediol and 1,5- 450 parts by mass of an amorphous polycarbonate diol having a number average molecular weight of 1958 g / mol made from pentandiol (molar ratio 50:50), 82 parts by mass of 2,4-tolylenediol isocyanate, and 0.47 parts by mass of tindibutyl dilaurate. The mixture was charged and reacted at 90 ° C. under a nitrogen stream for 1 hour. After confirming that the hydroxyl group conversion rate was 100.0%, which was a theoretical value, 74 parts by mass of 2-hydroxypropyl methacrylate was added under air flow, and the mixture was reacted at 90 ° C. for 2 hours. When the isocyanate group conversion rate became 100.0% or more, 0.030 parts by mass of tertiary butylcatechol was added to obtain urethane methacrylate (1) having a number average molecular weight of 2594 g / mol.

[Production Example 2] Production of acrylic radical curable resin impregnated primer (impregnated primer) 20 parts by mass of urethane methacrylate (1) obtained in Synthesis Example 1, 45 parts by mass of 2-hydroxypropyl methacrylate (HPMA), dicyclo 35 parts by mass of pentenyloxyethyl methacrylate (DCPOEMA), 1 part by mass of paraffin wax, 0.5 parts by mass of cobalt octylate, 0.15 parts by mass of p-tolyldiethanolamine, and a concentration of benzoyl peroxide with dibutyl phthalate 40. % Suspension (Nipper NS) was mixed and stirred at a ratio of 2 parts by mass to prepare an acrylic radical curable resin impregnated primer composition (paint) having a viscosity at 23 ° C. of 79 cP.

[Production Example 3] Production of acrylic radical curable resin mortar (resin mortar) 20 parts by mass of urethane methacrylate (1) obtained in Synthesis Example 1, 45 parts by mass of 2-hydroxypropyl methacrylate (HPMA), dicyclopentenyl 35 parts by mass of oxyethyl methacrylate (DCPOEMA), 1 part by mass of paraffin wax, 0.5 parts by mass of cobalt octylate, 0.15 parts by mass of p-tolyldiethanolamine, 40% of benzoyl peroxide with dibutyl phthalate. Suspense (Niper NS) was mixed in an amount of 2 parts by mass, No. 5 silica sand was mixed in an amount of 357 parts by mass, and calcium carbonate was mixed in a ratio of 210 parts by mass, and the mixture was stirred to prepare an acrylic radical curable resin mortar.

[Production Example 4] Production of acrylic radical curable resin waterproof material (waterproof material) 43 parts by mass of urethane methacrylate (1) obtained in Synthesis Example 1, 14 parts by mass of 2-hydroxypropyl methacrylate (HPMA), 2- 28 parts by mass of ethylhexyl methacrylate (EHMA), 14 parts by mass of dicyclopentenyloxyethyl methacrylate (DCPOEMA), 1 part by mass of paraffin wax, 0.5 parts by mass of cobalt octylate, 0.15 parts by mass of p-tolyldiethanolamine. A 40% concentration suspension (Niper NS) with dibutyl phthalate of benzoyl peroxide was mixed and stirred at a ratio of 2 parts by mass to prepare an acrylic radical curable resin composition (paint).

[Example 1]
NEXCO test method Volume 4 Test method 433-2013, a concrete flat plate with a size of 60 x 300 x 300 mm was cut with a small cutting machine (W50DC) to make the average depth of unevenness 3.5 mm, and then an impregnated primer. Was applied at 0.3 kg / m ² , and resin mortar was applied at ^{3.5 L / m 2} 30 minutes after the application start time of the impregnated primer. Thirty minutes after the start time of the resin mortar construction, a tensile adhesiveness test, a waterproofness test, and a surface roughness (average depth of unevenness) were measured. The evaluation results are shown in Table 1.

[Example 2]
NEXCO test method Volume 4 Test method 433-2013, a concrete flat plate with a size of 60 x 300 x 300 mm was cut with a small cutting machine (W50DC) to make the average depth of unevenness 3.5 mm, and then an impregnated primer. At 0.3 kg / m ^{2 , the resin mortar was applied at 3.5 L / m 2} 30 minutes after the start time of the impregnation primer application, and 0.8 kg of the waterproof material was applied 30 minutes after the application start time of the resin mortar. It was constructed at / m ^2. Thirty minutes after the construction start time of the waterproof material, a tensile adhesiveness test, a waterproofness test, and a surface roughness (average depth of unevenness) were measured. The evaluation results are shown in Table 1.

[Comparative Example 1]
NEXCO test method Volume 4 Test method 433-2013, a concrete flat plate with a size of 60 x 300 x 300 mm was cut with a small cutting machine (W50DC) to make the average depth of unevenness 3.5 mm, and Konishi stock. Epoxy resin impregnated primer manufactured by the company: E-810 was applied at ^{0.3 kg / m 2.} Since it was uncured after 30 minutes, the resin mortar and the waterproof material could not be applied.

[Comparative Example 2]
NEXCO test method Volume 4 Test method 433-2013, a concrete flat plate with a size of 60 x 300 x 300 mm is cut with a small cutting machine (W50DC) to make the average depth of unevenness 3.5 mm, and then a waterproof material. At 0.3 kg / m ² , the resin mortar was applied at 3.5 L / m ² 30 minutes after the application start time of the waterproof material, and 0.8 kg of the waterproof material was applied 30 minutes after the application start time of the resin mortar. It was constructed at / m ^2. Thirty minutes after the construction start time of the waterproof material, a tensile adhesiveness test, a waterproofness test, and a surface roughness (average depth of unevenness) were measured. The evaluation results are shown in Table 1.

[Reference example 1]
NEXCO test method Adhesion test, waterproofness test, and surface roughness (average depth of unevenness) were measured on a concrete flat plate with a size of 60 x 300 x 300 mm described in Volume 4, Test Method 433-2013. .. The evaluation results are shown in Table 1.

[Reference example 2]
NEXCO test method Volume 4 Test method 433-2013, a concrete flat plate with a size of 60 x 300 x 300 mm is cut with a small cutting machine (W50DC) to obtain an average depth of unevenness of 3.5 mm, and an adhesiveness test is performed. A waterproof test was conducted. The evaluation results are shown in Table 1.

From the results of Reference Example 2, Example 1 and Comparative Example 2 in Table 1, it can be seen that the adhesive strength with the cut concrete plate is recovered to be equal to or higher than that of the uncut base by using the impregnated primer.
From the results of the surface roughness of Reference Example 2 and Example 1, it can be seen that the unevenness of the cut concrete plate is flattened by using the resin mortar.
From the results of Reference Example 2, Example 1 and Example 2, it can be seen that the use of the impregnated primer and the non-landing adjusting material (resin mortar) exhibits waterproofness, and the combined use of the waterproof layer further enhances the waterproofness.
From the results of Example 1 and Comparative Example 1, it can be seen that the radically cured acrylic resin-based impregnated primer is suitable for short-time construction.

The floor slab waterproof structure of the present invention is useful, for example, for waterproofing bridges and buildings, especially for road bridges and railway bridges.

1 Concrete floor slab 2 Primer layer 3 Non-landing adjustment layer 4 Waterproof layer 5 Adhesive layer 6 Pavement layer 10, 20 Floor slab waterproof structure

Claims (22)

A floor slab waterproof structure in which a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete deck.
A floor slab waterproof structure in which the primer composition has an impregnating function and contains a radical reaction-curable acrylic resin. The floor slab waterproof structure according to claim 1, wherein the primer composition hardening layer and the non-landing adjustment layer are sequentially provided on the concrete floor slab. The floor slab waterproof structure according to claim 1, wherein a waterproof layer is further provided on the concrete floor slab. The floor slab waterproof structure according to claim 3, wherein the primer composition hardening layer, the non-landing adjustment layer, and the waterproof layer are sequentially provided on the concrete floor slab. The floor slab waterproof structure according to any one of claims 1 to 4, wherein the non-land adjusting layer is made of a resin mortar. The floor slab waterproof structure according to claim 5, wherein the resin used for the resin mortar is a radical reaction-curable acrylic resin. The floor slab waterproof structure according to any one of claims 1 to 4, wherein the non-land adjusting layer is composed of a polymer cement mortar. The floor slab waterproof structure according to any one of claims 3 to 7, wherein the waterproof layer is composed of a resin coating film waterproof layer. The floor slab waterproof structure according to claim 8, wherein the resin coating film waterproof layer is made of a radical reaction-curable acrylic resin. The floor slab waterproof structure according to claim 9, wherein the radical reaction-curable acrylic resin contains urethane acrylate having a structure derived from polycarbonate polyol. 9. The elongation of the resin coating waterproof layer composed of the radical reaction-curable acrylic resin is larger than the elongation of the primer composition cured layer having an impregnating function and containing the radical reaction-curable acrylic resin. Or the floor slab waterproof structure according to 10. The floor slab waterproof structure according to any one of claims 3 to 11, wherein an asphalt coating film-based pavement adhesive layer is provided on the waterproof layer. The floor slab waterproof structure according to claim 12, wherein an aggregate is contained in the pavement adhesive layer. A method for manufacturing a floor slab waterproof structure in which a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete floor slab.
A method for manufacturing a floor slab waterproof structure including the following two steps.
Step A) A step of applying a primer composition containing a radical reaction-curable acrylic resin having an impregnation function and curing the primer composition to obtain a cured layer of the primer composition, and a step B) applying a resin for forming a non-landing adjustment layer. , The process of curing to obtain a non-landing adjustment layer. The floor slab waterproofing according to claim 14, further comprising a step of applying a resin forming a resin coating film waterproof layer on the layer obtained in the step A or B and curing the resin to obtain a resin coating film waterproof layer. Method of manufacturing the structure. The method for producing a floor slab waterproof structure according to claim 14 or 15, wherein the non-land adjusting layer is composed of a resin mortar, and the resin used for the resin mortar is a radical reaction-curable acrylic resin. The method for producing a floor slab waterproof structure according to any one of claims 15 or 16, wherein the time from the start of application of the primer composition to the acquisition of the resin coating film waterproof layer is within 3 hours. A method for manufacturing a floor slab waterproof structure in which a primer composition hardening layer and a non-landing adjustment layer are provided on a concrete floor slab, and a method for manufacturing a floor slab waterproof structure including the following two steps.
A) A step of applying a primer composition containing a radical reaction-curable acrylic resin having an impregnation function to obtain a primer composition cured layer, and B) a radical reaction-curable type on the obtained primer composition cured layer. A step of applying a resin that forms a non-landing adjustment layer containing an acrylic resin to obtain a non-landing adjustment layer. The floor slab waterproof structure according to claim 18, further comprising a step of applying a resin forming a resin coating film waterproof layer on the layer obtained in the step A or B to obtain a resin coating film waterproof layer. Production method. The floor slab waterproof structure according to any one of claims 14 to 19, wherein the step A is carried out on a concrete deck and the step B is carried out on the layer obtained in the step A. Production method. A primer composition used in the method for producing a floor slab waterproof structure according to any one of claims 1 to 13 or a floor slab waterproof structure according to any one of claims 14 to 20.
A primer composition having an impregnation function and containing a radical reaction-curable acrylic resin. The resin forming the non-landing adjustment layer in the method for producing the floor slab waterproof structure according to any one of claims 1 to 13 or the floor slab waterproof structure according to any one of claims 14 to 20. Radical reaction curable acrylic resin used as.

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