KR102147183B1 - Waterproofing and paving method of bridge surface using hybrid gel composition and waterproof sheet - Google Patents

Abstract

The present invention relates to a method for waterproofing and paving a bridge surface, which includes the following steps of: (S10) constructing a primer layer by applying a primer to an upper plate of a bridge; (S20) constructing a waterproof layer by applying a paint film waterproofing material containing resin, hardeners, pigments, metal nanoparticle oxides, dispersants, thickeners, fillers, and stabilizers to an upper surface of the primer layer; (S30) constructing a waterproof sheet layer by installing a waterproof sheet on an upper portion of the waterproof layer; and (S40) constructing a pavement layer by placing asphalt concrete onto an upper portion of the waterproof sheet layer. Therefore, the method for waterproofing and paving a bridge surface can improve resistance to impact.

Description

Waterproofing and paving method of bridge surface using hybrid gel composition and waterproof sheet}

The present invention uses a hybrid gel composition with improved waterproofness and a waterproof sheet It relates to the waterproofing method of the bridge.

In general, in order to construct a bridge, the piers are constructed at predetermined distances in consideration of the topography and the surrounding environment, and the adjacent piers are connected with steel structures and reinforced concrete structures, and pavement works are performed on top of them with ascon or cement, etc. By doing so, a road through which vehicles can pass is completed. In particular, the bridge deck is completed by installing a P.C beam previously manufactured at a steel mill, etc. between the pier and the pier, and placing reinforcing bars at predetermined intervals according to the design drawing in the upper space of the P.C beam, and then pouring concrete.

And before the bridge deck is completed and pavement work is carried out using asphalt concrete or cement as described above, the bridge surface of the bridge deck must be waterproof in order to prevent water from permeating into the reinforced concrete and corroding the reinforcing bar used as the core material. You have to do construction.

So, after the concrete pouring work for the formation of the top plate is finished and the concrete has been cured to some extent, use a leveling machine, etc., to remove the latencies and irregularities generated during the concrete pouring process for waterproof work, and the adhesion of the primer. Pre-treatment work is performed to remove foreign substances such as oil or paint that degrades the product.

As a conventional waterproofing method used for bridge construction, a waterproofing method was used in which a penetration-type waterproofing agent obtained by diluting an undiluted solution such as Silicone, Siloxane, Silane, etc. in a solvent penetrated into the mother body more than 4mm to generate a waterproof effect due to water repellency. However, this waterproofing method is limitedly applied because it does not have a waterproofing effect when water pressure above a predetermined pressure is applied.

In addition, a coating-type waterproofing method and a sheet-type waterproofing method are applied as a method of putting a waterproofing agent on the upper bridge surface. Among them, in the coating type waterproofing method, a primer is first or secondly applied to the bridge surface of the upper board after the pretreatment, and after the primer coating layer is dried, a gel-like waterproofing agent containing chloroprene synthetic rubber as the main material is used for at least a second time. It is a waterproofing method carried out over. On the other hand, the sheet-type waterproofing method is a waterproofing method in which a non-woven fabric is used as a central base material in a primer coating layer, and a waterproof sheet prepared by mixing thermoplastic rubber and asphalt, and then coating a silica sand and a polyethylene film on the upper surface thereof.

However, it is difficult to expect a sufficient waterproofing effect in such a pavement structure, and there is a problem that lift occurs due to heterogeneous materials between the layers when the structure is composed of multiple layers.

Korean Patent Registration No. 1741798

The present invention uses a hybrid gel composition and a waterproof sheet capable of controlling the problem of deteriorating durability due to the occurrence of interlayer lift while improving the disadvantages of the conventional bridge pavement structure. It is intended to provide a waterproof packing method for the bridge.

Using the hybrid gel composition and the waterproof sheet of the present invention as a means for solving the above problems The bridge surface waterproofing method (hereinafter referred to as "the method of the present invention") includes the steps of applying a primer to a bridge upper plate to construct a primer layer (S10); Applying a coating film waterproofing material including a resin, a hardener, a pigment, a metal nanoparticle oxide, magnesium oxide, a dispersant, a thickener, a filler, and a stabilizer on the upper surface of the primer layer to construct a waterproof layer (S20); Installing a waterproof sheet on top of the waterproof layer to construct a waterproof sheet layer (S30); And constructing a pavement layer by placing asphalt concrete on the waterproof sheet layer (S40).

As an example, the waterproof sheet is formed by impregnating a fiber sheet with a resin.

As an example, the fiber sheet is supported so that the upper and lower sheets forming pores having large diameters, the middle sheet forming pores having a diameter smaller than that of the upper and lower sheets, and the upper, middle, and lower sheets form spaces, respectively. It characterized in that it comprises a plurality of support yarn, characterized in that the resin is impregnated in the middle sheet.

As an example, in step S30, a waterproof sheet is installed on the waterproof layer, but before the waterproof layer is cured, the lower sheet of the waterproof sheet is installed so that the waterproof layer is impregnated, and in step S40, on the waterproof sheet layer Ascon is poured, but it is characterized in that it is poured so that the upper sheet of the waterproof sheet is impregnated in the pavement layer.

As an example, the fiber sheet is characterized in that it is formed of thermally conductive fibers.

As described above, the bridge surface pavement structure constructed by the construction method of the present invention has an advantage of having excellent watertightness and excellent durability by making waterproofing in multiple layers.

In addition, the method of the present invention has the advantage of preventing interlayer lifting and improving resistance to impact.

1 is a block diagram showing the method of the present invention.
Figure 2 is a schematic diagram showing a bridge surface pavement structure constructed by the construction method of the present invention.
Figure 3 is a side cross-sectional view showing an example of a waterproof sheet applied to the present invention.
Figure 4 is a schematic diagram showing another example of the waterproof sheet applied to the present invention.
Figure 5 is a partial view of the bridge surface packaging structure to which the waterproof sheet shown in Figure 4 is applied.

Hereinafter, the configuration and operation of the present invention will be described in more detail based on the accompanying drawings. In describing the present invention, terms or words used in the present specification and claims are the present invention based on the principle that the inventor can appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted as a meaning and concept consistent with the technical idea of

The construction method of the present invention comprises the steps of constructing a primer layer by applying a primer to a bridge upper plate as shown in FIG. 1 (S10); Applying a coating waterproofing material including a resin, a hardener, a pigment, a metal nanoparticle oxide, a dispersant, a thickener, a filler, and a stabilizer on the upper surface of the primer layer to construct a waterproof layer (S20); Installing a waterproof sheet on top of the waterproof layer to construct a waterproof sheet layer (S30); And constructing a pavement layer by placing asphalt concrete on the waterproof sheet layer (S40).

As shown in Fig. 2, the bridge surface pavement structure (1) is constructed by the above construction method, and the bridge surface pavement structure (1) is a primer layer (2) on the upper part of the bridge deck (a), and a waterproof layer on the upper part of the primer layer (2). (3), a waterproof sheet layer 4 on the waterproof layer 3 and a packaging layer 5 on the waterproof sheet layer 4 are included. As described below, the waterproof layer 3 is formed of a composition having improved watertightness and durability, and a structure that doubles the watertightness is expressed by further comprising a waterproof sheet layer 4 on the waterproof layer 3.

The construction method of the present invention first includes a step (S10) of applying a primer to a bridge top to construct a primer layer. Here, since various known materials may be applied to the primer, a detailed description thereof will be omitted.

Next, a step of constructing a waterproof layer by applying a coating waterproofing material including a resin, a hardener, a pigment, a metal nanoparticle oxide, a dispersant, a thickener, a filler, and a stabilizer on the upper surface of the primer layer (S20). Here, the waterproofing material may further contain magnesium oxide.

The coating waterproofing material is preferably 10 to 20 parts by weight of a curing agent, 6 to 40 parts by weight of a pigment, 6 to 40 parts by weight of metal nanoparticle oxide, 3 to 5 parts by weight of magnesium oxide, and 2 to 5 parts by weight of a dispersant based on 100 parts by weight of the resin. , It is reasonable to include 2 to 5 parts by weight of a thickener, 5 to 10 parts by weight of a filler, and 2 to 5 parts by weight of a stabilizer.

The coating waterproofing material exhibits the effect of filling the pores of large particles due to the difference in particle size and density of pigments with an average particle diameter of 1 to 40 µm and metal nanoparticles of 40 to 250 ㎚, so that resin, pigment and metal nanoparticles are dense square grid. By forming a passivation film in the form of a structure (cube structure, referred to as "nanocube"), functions such as abrasion resistance, flame resistance, corrosion resistance, and adhesion are improved, thereby protecting the surface to be coated and blocking the penetration of harmful factors to increase the durability of the structure. It is to be able to increase.

The type of the resin is not limited, and for example, one of an epoxy resin composed of a reaction product of epichlorohydrin and bisphenol A or a reaction product of epichlorohydrin and bisphenol F may be used as an epoxy resin.

The pigment has an average particle diameter of 1 to 40 μm, and it is reasonable to have the metal nanoparticle oxide have a particle diameter of 40 to 250 nm. This is because the pigment has the same basic arrangement for each particle, but the direction is different and the particles and particles As the number of grain boundaries per unit area between them shows a tendency to have strong mechanical properties, it serves as a frame of a flake structure, and a square structure in which the coating film is tight by filling the flake structure frame with fine metal nanoparticle oxides. Is to be formed.

It is reasonable to limit the pigment to have an average particle diameter of 1 to 40 μm. The reason for this limitation is that when the particle diameter is smaller than this, the function as a sufficient frame is insignificant, and when the particle diameter exceeds this, the specific gravity becomes too large and the dispersibility decreases, so that non-uniform physical properties may be expressed.

In the case of the pigment, the type is not limited, for example, lead, cadmium, mercury, arsenic, antimony, and compounds thereof and hexavalent chromium compounds are not included, and one of titanium dioxide, talc, silicon dioxide, and aluminum powder or What is a mixture can be applied.

In addition, it is reasonable to limit the metal nanoparticle oxide to have an average particle diameter of 40 to 250 nm. Here, when the metal nanoparticle oxide is less than 40 nm, the distribution of the average particle size is too low and the price is high, so there is an uneconomic problem. When the oxide of the metal nanoparticles is more than 250 nm, the distribution of the average particle size is large, so that the pores formed in the pigment are large. It is limited as described above because it cannot be properly filled and thus hinders the tight structure.

The type of metal nanoparticle oxide is also not limited, and examples include titanium dioxide, silicon dioxide, manganese, magnesium, aluminum, zinc oxide, indium tin oxide, magnesium silicate, magnesium oxide, antimony oxide, kaolin, and dioxide. One or a mixture of two or more of silica, alumina trioxide, molybdenum trioxide, niobium pentoxide, vanadium pentoxide, and tungsten bronze may be applied.

The type of the curing agent is not limited, and as an example, a polyamide room temperature curing type curing agent may be used.

In addition, it is preferable that a surfactant (Unsaturated Polymide acid Ester Salts) is preferably used as the dispersant.

In addition, it is preferable that the thickener is used organic clay.

Meanwhile, the filler may include carbon graphite and butyl rubber.

The carbon graphite is to reinforce the strength and to improve the impact resistance against external impact, and by the addition of carbon graphite, a conductor, the generation of static electricity is controlled to prevent the deposition of foreign substances on the surface by static electricity. That is, in case of accumulation of foreign matter, it is controlled because it can cause problems such as corrosion on the surface.

In addition, butyl rubber is added in addition to the carbon graphite. The butyl rubber is a rubber obtained by ion polymerization of isobutylene and a small amount of isoprene in a liquid state at a low temperature, and isobutylene having a purity of 99% or more with 1.5 to 4.5% Isoprene mixture and pure methyl chloride are added, anhydrous aluminum chloride is added as a catalyst, and then put into a polymerization reactor and polymerized at a low temperature of about -100℃. As there is no unsaturation, pattern viscosity, and contamination, halogenated butyl rubber and polyisobutyl It is divided into several types such as Len. This butyl rubber absorbs impact well and has flexibility even at temperatures as low as -50℃ because the elastic body does not crystallize well even at low temperatures.

The reason for the addition of the butyl rubber is that it enhances impact resistance and does not lose its elasticity even at low temperatures, so that the butyl rubber is affected by continuous expansion and contraction of the paste in the process of repeated freezing and thawing in winter, etc. It is possible to improve the cold resistance by reducing the temperature.

That is, if freeze-thawing is repeated in the paste at low temperatures, cracks may occur in the paste due to repeated expansion and contraction. The butyl rubber can maintain elasticity even at low temperatures to compensate for this expansion and contraction. You can control the ideal.

The magnesium oxide not only induces expansion to fundamentally suppress the occurrence of cracks, but also stably induces crystallization in the paste, that is, produces Mg(OH) ₂ to have the function of sealing voids caused by cracks, etc. will be. In other words, by controlling cracks, the waterproofing properties are further doubled and durability can be improved.

Next, a step of constructing a waterproof sheet layer by installing a waterproof sheet on the waterproof layer (S30) is performed. The waterproof sheet layer 4 is formed by placing a waterproof sheet between the pavement layer 5 and the waterproof layer 3 as shown in the bridge surface packaging structure 1 of FIG. 2.

Hereinafter, the waterproof sheet presented in the present invention will be described, and the case of the waterproof sheet forming the waterproof sheet layer 4 will also be described by the same reference numerals.

The waterproof sheet 4 shown in FIG. 3 shows an example in which the resin 42 is impregnated in the fiber sheet 41, and thus the waterproof sheet 4 in which the resin 42 is impregnated in the fiber sheet 41 ) Is presented to ensure that the strength of the waterproof sheet 4 is reinforced by the fiber sheet 41. Here, the resin 42 does not limit its type.

In particular, in this embodiment, the fiber sheet 41 is characterized in that it is formed of thermally conductive fibers.

That is, the fiber yarn constituting the fiber sheet 41 is formed by thermally conductive fibers, for example carbon fiber may be applied. The fiber sheet 41 made of carbon fiber has high tensile strength, so that the durability of the waterproof sheet 4 itself is improved, as well as the fiber sheet 41 itself has a high thermal conductivity as shown in FIG. Heat energy (E) transferred to the sheet 4 is transferred in the transverse direction through the fiber sheet 41 to control the transfer of heat energy to the waterproof layer 3 or the like below.

In this way, by transferring the heat transferred from the fiber sheet 41 in the transverse direction, the problem of interlayer lifting due to heat deformation in the waterproof layer 3 by transfer of heat energy to the waterproof layer 3 can be controlled.

Further, an example of another waterproof sheet 4 is shown in FIGS. 4 and 5.

In this embodiment, the fiber sheet 41 includes upper and lower sheets 411 and 412 forming pores having a large diameter, and a middle sheet forming pores having a diameter smaller than that of the upper and lower sheets 411 and 412 ( 413) and the upper, middle, and lower sheets (411, 412, 413) including a plurality of support yarns 414 supporting each to form a space, and the resin 42 is impregnated in the middle sheet 413 It features.

That is, the waterproof sheet 4 of this embodiment includes the upper, middle, and lower sheets 411, 412, 413, so that only the middle sheet 413 is impregnated with the resin 42 in the fiber sheet 41 formed by a triple sheet. It has its characteristics.

To this end, as shown in the drawing, the diameter (d1) of the voids formed in the upper and lower sheets (411, 412) is configured to be larger than the diameter (d2) of the voids formed in the middle sheet 413, so that the fiber sheet 41 When the resin 42 is impregnated, the resin 42 passes through the pores of the upper sheet 411 or the lower sheet 412 to impregnate the middle sheet 413 having a small pore diameter.

That is, by preventing the resin 42 from descending from the small voids of the middle sheet 413 due to the viscosity of the resin 42, the resin 42 is impregnated only with the middle sheet 413. For this purpose, the viscosity of the resin 42 must be adjusted so as to pass through the voids of the upper sheet 411 or the lower sheet 412 so as to be caught in the voids of the middle sheet 413.

In the fiber sheet 41, a plurality of support yarns 414 for supporting the upper, middle, and lower sheets 411, 412, and 413 to form a spaced apart from each other are configured so that the fiber sheet 41 has a three-dimensional shape. Here, in particular, the support thread 414 is a configuration to maintain the frame of the upper, middle, and lower sheets (411, 412, 413), and the material is not limited, but the rigidity should be expressed to some extent. As described, the upper sheet 411 must be impregnated into the pavement layer 5 and the lower sheet 412 must be impregnated into the waterproof layer 3, respectively. In each construction process, folding does not occur and the frame is maintained. The upper sheet 411 is intended to be impregnated into the packaging layer 5 and the lower sheet 412 is impregnated into the waterproof layer 3.

In addition, since the support thread 414 has a function of mitigating an impact applied to the bridge surface packaging structure 1 by expressing the function of the spring, an elastic material should be used. That is, a material that exhibits some degree of stiffness and elasticity should be used. For example, aramid fiber may be used.

The waterproof sheet 4 configured as described above is in a state in which the upper sheet 411 is impregnated in the packaging layer 5 as shown in FIG. 5 in the bridge surface packaging structure 1, and the lower sheet 412 is in the waterproof layer 3 It is to be constructed in an impregnated state.

To this end, in step S30, a waterproof sheet 4 is installed on the waterproof layer 3, but before the waterproof layer 3 is cured, the lower sheet 412 of the waterproof sheet 4 is It is installed so as to be impregnated in, and in step S40, ascon is poured over the waterproof sheet layer 4, but the upper sheet 411 of the waterproof sheet 4 must be poured so that the pavement layer 5 is impregnated.

For this purpose, as mentioned above, the support thread 414 is made of a material having a certain degree of rigidity, and when pouring into the waterproof layer 3 before curing of the waterproof sheet 4 and when placing asphalt concrete on the top of the waterproof sheet 4 Folding should not occur, and the diameters of the pores of the upper sheet 411 and the lower sheet 412 are relatively large so that the coating waterproofing material and the asphalt concrete can easily pass through the pores to be impregnated.

The reason to be configured in this way is that the waterproof layer 3 and the packaging layer 5 made of different materials may cause interlayer lift due to thermal deformation, etc., but the lower sheet 412 and the upper sheet of the waterproof sheet 4, respectively. By embedding 411, the waterproof layer 3, the waterproof sheet layer 4, and the pavement layer 5 can be integrally operated, and cracks generated by various causes in the waterproof layer 3 and the pavement layer 5 By making the lower sheet 412 and the upper sheet 411 crosslink, respectively, the resistance to cracking is improved to double watertightness and durability.

In addition, by alleviating various loads transmitted to the bridge surface pavement structure 1 by the elastic behavior of the support thread 414, the bridge surface pavement structure 1 itself has an elastic behavior. When the waterproof sheet layer 4 is constructed, a step (S40) of constructing the pavement layer 5 by placing asphalt concrete on the top is performed.

Here, the material of ascon is not limited, and for example, asphalt, a modified asphalt binder including an elastic material, and an additive, and a filler may be included. By using the modified asphalt binder, elasticity is imposed so that plastic deformation at high temperature and cracking at low temperature can be controlled.

Here, as the elastic material, natural rubber, which is a high elastic material, can be applied.Since the amount of filler can be reduced and the content of asphalt binder can be increased, ductile deformation can be increased at low temperatures, and tensile strength and strain can be increased.

It will be appreciated by those skilled in the art through the above description that various changes and modifications can be made without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be determined by the claims.

1: bridge surface packaging structure 2: primer layer
3: waterproof layer 4: waterproof sheet layer (waterproof sheet)
5: paving layer

Claims (6)

Applying a primer to the bridge upper plate to construct a primer layer (S10);
Applying a coating waterproofing material including a resin, a hardener, a pigment, a metal nanoparticle oxide, a dispersant, a thickener, a filler, and a stabilizer on the upper surface of the primer layer to construct a waterproof layer (S20);
Installing a waterproof sheet on top of the waterproof layer to construct a waterproof sheet layer (S30);
Placing asphalt concrete on the waterproof sheet layer to construct a pavement layer (S40);
Including,
The waterproof sheet is to be impregnated with resin in the fiber sheet,
The fiber sheet includes a plurality of upper and lower sheets forming pores having a large diameter, a middle sheet forming pores having a diameter smaller than that of the upper and lower sheets, and a plurality of supporting the upper, middle, and lower sheets to form spaces, respectively. Including a support thread, the resin is characterized in that the resin is impregnated only in the middle sheet by adjusting the viscosity so as to be caught in the voids of the middle sheet while passing through the voids of the upper sheet or the lower sheet,
In the step S30, a waterproof sheet is installed on the waterproof layer, but before the waterproof layer is cured, a lower sheet of the waterproof sheet is installed so that the waterproof layer is impregnated, and in step S40, ascon is poured on the waterproof sheet layer. , The upper sheet of the waterproof sheet is impregnated into the pavement layer so that the waterproof layer, the waterproof sheet layer, and the pavement layer can behave integrally, and the lower sheet and the upper sheet in the waterproof layer and the pavement layer are crosslinked to prevent cracking. Bridge surface waterproofing method, characterized in that it improves resistance.
The method of claim 1,
The waterproofing method of the bridge surface, characterized in that magnesium oxide is further included in the coating waterproofing material.
delete delete delete The method of claim 1,
The fiber sheet is a waterproofing packaging method, characterized in that formed by thermally conductive fibers.

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