KR102382624B1 - Modified asphalt based waterproof coating composition for complex waterproofing bridge deck and construction method for complex waterproofing bridge deck using the same - Google Patents

Abstract

The present invention relates to a modified asphalt coating film waterproofing material composition for composite waterproofing of a bridge deck, and to a construction method for composite waterproofing of a bridge deck by using the composition, capable of implementing excellent waterproofing, adhesion, and tensile performance. According to the present invention, the modified asphalt coating film waterproofing material composition for composite waterproofing of a bridge deck includes straight asphalt, a polymer modifier, a filler, a mesophilic additive, a self-healing agent, a plasticizer, a flame retardant, and a curing regulator.

Description

Modified asphalt coating waterproofing material composition for composite waterproofing of bridges and construction method of composite waterproofing for bridges using the same

The present invention can implement excellent waterproofing, adhesion and tensile performance, and has excellent crack followability by shear stress, crack followability and durability due to shrinkage/expansion according to temperature change, which can contribute to extending the life of buildings and bridges. It relates to a modified asphalt coating waterproofing material composition for composite waterproofing and a method for constructing a bridge surface composite waterproofing using the same.

In general, when rainwater or groundwater penetrates into buildings and bridges, the bonding strength of concrete materials is lowered, and pore cracks occur according to the volume change of water due to temperature change, and over time the cracks expand to damage buildings and bridges. A decrease in strength and lifespan is caused to the structure to be formed. In particular, in the case of a bridge, as the vehicle passes, the top plate is bent and vibration is generated by its own load and impact, which causes microcracks in the pavement layer and separation between the bridge surface and the pavement layer. Due to this, it can penetrate into the bridge deck and promote cracking of the deck, and corrode the structure or the reinforcing bars forming the structure, leading to a shortened lifespan of the structure and the risk of collapse.

Therefore, there is a need for a waterproofing material having excellent properties that can suppress the expansion of cracks in the structure by absorbing the perfect waterproofing of buildings and bridges, and absorbing loads and shocks. In addition, various materials such as modified asphalt are used for perfect waterproofing of these buildings and bridges, and the required physical properties are varied according to the use, so improvement of physical properties is required in various fields.

On the other hand, the waterproofing method can be roughly divided into a sheet waterproofing method, a coating film waterproofing method, and a composite waterproofing method mixing these methods.

The sheet waterproofing method is a method of forming a waterproofing layer by using an adhesive or fusion of a factory-produced waterproofing sheet. Since the product is standardized, the thickness of the waterproofing layer is uniform, the finish is beautiful, and the construction is quick, so the construction period is shortened. The defect occurrence rate is high at the joint between the sheets, and it is difficult to work in the complicated construction site, and there is a risk of peeling and sagging due to the temperature change in the wall or parapet site after construction. In addition, since the sheet material is sensitive to temperature, it is affected by work in winter or summer, and there is a problem in that water leakage occurs as the waterproof performance decreases due to partial joint failure and fracture due to insufficient stability.

In addition, the coating waterproofing method is a method of forming a waterproofing film by applying a liquid waterproofing material to the base surface multiple times. Simple construction is possible even if it is installed on the base surface, but there is a problem that the thickness of the coating film is formed non-uniformly along the irregularities of the base surface, since irregularities are inevitable no matter how well the construction is done on the concrete base surface. Because it is a construction method, there is a risk that a part of the waterproofing film may swell due to the water vapor pressure generated on the concrete substrate, pinholes may occur due to pores in the substrate, and problems such as poor curing due to incorrect mixing of materials may occur. there is.

Accordingly, various composite waterproofing methods have been developed and applied to the field by supplementing the respective disadvantages of the sheet waterproofing method and the coating film waterproofing method. After construction, even if there is a defect in any one part of the waterproofing area, waterproofing is directly related to leakage. In particular, most of the leaking part is the joint part where the sheet is connected to the sheet, so the joint part is a very important construction point in waterproofing construction. However, in the composite waterproofing method, the sheet is dissolved by the organic solvent contained in the coating material, so there is a problem that not only lack of waterproof performance, but also the melt is discharged through cracks in the structure and damage the structure. Due to the lack of interlayer integrity between the two materials, which is caused by using different dissimilar materials, the problem of rupture of the joint between the sheets due to the separation between the layers and the lack of flexibility still remains a problem, and the adhesive strength at the interface is low. As the sheet repeatedly contracts and expands depending on the outside temperature, as well as the watertightness is weakened due to the rapid lowering, there is still a problem that the coating film at the joint area is cracked or broken, which causes water leakage.

Republic of Korea Patent Registration No. 10-0607154 Republic of Korea Patent Registration No. 10-1681001 Republic of Korea Patent Registration No. 10-2261398

The present invention has been devised to solve the above problems, and an embodiment of the present invention implements excellent waterproofing, adhesion and tensile performance, thereby improving the waterproofing rate, and effectively preventing cracking, lifting or peeling phenomenon, and a modified asphalt coating waterproofing material composition for composite waterproofing of bridges that can contribute to extending the lifespan of bridges, and a method of constructing composite waterproofing for bridges using the same.

Various problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

One embodiment of the present invention is straight asphalt 30 to 70% by weight, polymer modifier 10 to 30% by weight, filler 5 to 20% by weight, medium temperature additive 1 to 5% by weight, self-healing agent 1 to 5% by weight, plasticizer 1 to 5% by weight, a flame retardant 1 to 5% by weight, and a curing control agent 0.1 to 1% by weight as a modified asphalt coating waterproofing composition for composite waterproofing comprising:

The polymer modifier is based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer, 80 to 120 parts by weight of a polyether-polyamide block copolymer (EBA), 40 parts by weight of a styrene-isoprene-styrene (SIS) block copolymer to 60 parts by weight, 30 to 50 parts by weight of an olefin-maleic anhydride copolymer, 1 to 10 parts by weight of polyrotaxane, 0.1 to 5 parts by weight of dipotassium glycyrrhizinate, and 0.1 to 5 parts by weight of dithiothreitol;

The filler is based on 100 parts by weight of calcium carbonate, 30 to 50 parts by weight of slaked lime, 10 to 30 parts by weight of bentonite, zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) 1 to 10 parts by weight, 1 to 10 parts by weight of aluminum hydroxide, 0.1 to 5 parts by weight of magnesium diboride powder;

The self-healing agent contains 50 to 80 parts by weight of a nylon resin and 50 to 80 parts by weight of a polyethylene terephthalate based on 100 parts by weight of the ionomer resin;

The plasticizer provides a modified asphalt coating film waterproofing composition for bridge surface composite waterproofing comprising 30 to 50% by weight of vegetable oil containing fatty acids and 50 to 70% by weight of tall oil pitch.

The polyrotaxane is a cyclodextrin cyclic molecule, a polybutadiene linear molecule that is skewered in the opening of the cyclodextrin cyclic molecule, and is disposed at both ends of the polybutadiene linear molecule to prevent detachment of the cyclodextrin cyclic molecule having a blocker that prevents;

All or part of the hydroxyl group of the cyclodextrin is substituted with a sulfonic acid group or a sulfuric ester group;

The blocking group disposed at both ends of the polybutadiene linear molecule to prevent detachment of the cyclic cyclodextrin molecule may include an anthracene-sorbitol ethoxylate complex represented by the following formula (1).

[Formula 1]

In the above formula, n is an integer from 2 to 10.

The zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is a plate-shaped zinc phosphate;

The plate-shaped zinc phosphate is prepared by dissolving zinc hydroxide in water or hydrochloric acid diluted to a concentration of 15 to 30% by weight; preparing a precipitate of zinc carbonate while slowly adding an aqueous carbonate solution having a concentration of 15 to 30 wt% to the solution dropwise; preparing a plate-shaped zinc phosphate precipitate while slowly adding dropwise an aqueous phosphate solution having a concentration of 15 to 30 wt % to the solution containing the zinc carbonate precipitate; It may be prepared by a manufacturing method comprising the steps of filtering, washing with water and drying the solution containing the plate-shaped zinc phosphate precipitate.

Preparing plate-shaped zinc phosphate precipitates while slowly adding 15 to 30 wt% of an aqueous phosphate solution dropwise to the solution containing the zinc carbonate precipitates; is a spider silk in 100 parts by weight of the solution containing the zinc carbonate precipitates 0.1 to 5 parts by weight of the hydrolyzate is further mixed, and then an aqueous solution of phosphate having a concentration of 15 to 30% by weight is slowly added dropwise thereto to prepare a plate-shaped zinc phosphate precipitate;

The hydrolyzate of the spider silk is prepared by a manufacturing method comprising the steps of hydrolyzing the spider silk with hydrochloric acid of 5 to 20 times the weight and 0.5 to 8N, and concentrating the hydrolyzate under reduced pressure, followed by freeze-drying and powdering. can

In addition, another embodiment of the present invention is a bridge surface composite waterproofing construction method using the modified asphalt coating waterproofing material composition for the bridge surface composite waterproofing,

After cutting the pavement of the aged bridge surface, removing foreign substances and cutting the protruding part to keep it flat to arrange the base surface; a primer layer forming step of forming a primer layer by applying a primer to the bridge surface; forming a waterproofing coating layer by applying a modified asphalt coating waterproofing composition for bridge surface composite waterproofing on top of the primer layer; forming a sheet waterproofing layer by attaching an asphalt felt sheet to an upper portion of the coating film waterproofing layer; After pouring asphalt concrete on top of the sheet waterproofing layer, compacting and curing provides a bridge surface composite waterproofing construction method comprising the step of forming an asphalt concrete layer.

The primer is to include a methyl methacrylate-based resin having a viscosity of 5 to 25 cps, a shear adhesive strength of 10 to 30 MPa, and a tensile elongation of 5 to 90%;

The asphalt felt sheet is made by impregnating a central reinforcement comprising a polyester long fiber or short fiber nonwoven fabric in the modified asphalt coating waterproofing composition for bridge surface composite waterproofing, and then attaching silica sand or aluminum oxide to the top, bottom, or both sides to finish. will;

The asphalt concrete may include 88 to 93% by weight of aggregate and 7 to 12% by weight of the modified asphalt coating film waterproofing composition for the bridge surface composite waterproofing.

According to the modified asphalt coating waterproofing composition for bridge surface composite waterproofing according to an embodiment of the present invention and the bridge surface composite waterproofing construction method using the same, there is an effect that can implement excellent waterproofing, adhesion and tensile performance. In particular, by forming a composite waterproofing layer of the modified asphalt coating waterproofing material composition for bridge surface composite waterproofing on the base surface and simultaneously laying the asphalt felt sheet continuously to form a perfectly integrated composite waterproofing layer of the asphalt felt sheet, the overlap of the asphalt felt sheets The part is completely sealed and a composite waterproofing layer of uniform thickness can be obtained, so that the waterproofing rate is improved, and the construction can be done safely and easily.

In addition, it is perfectly integrated with a rigid concrete structure having different coefficients of thermal expansion with excellent adhesion, and has excellent crack followability due to shear stress, thereby effectively preventing cracking, lifting or peeling.

In addition, the crack followability due to shrinkage/expansion according to the temperature change of the structures of buildings and bridges is very good, and the waterproof layer does not break during the expansion and contraction according to the climate change, so the risk of water leakage is small, and it has excellent durability against alkalis and acids, It has the effect of contributing to the extension of the lifespan of buildings and bridges.

1 is a view showing a construction flow diagram of a bridge surface composite waterproofing construction method using a modified asphalt coating waterproofing material composition for a bridge surface composite waterproofing according to an embodiment of the present invention.
2 shows an actual construction image of a bridge surface composite waterproofing construction method using the modified asphalt coating waterproofing material composition for bridge surface composite waterproofing according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, this is provided as an example, and the present invention is not limited thereto, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention is straight asphalt 30 to 70% by weight, polymer modifier 10 to 30% by weight, filler 5 to 20% by weight, medium temperature additive 1 to 5% by weight, self-healing agent 1 to 5% by weight, plasticizer 1 to 5% by weight, a flame retardant 1 to 5% by weight, and a curing control agent 0.1 to 1% by weight as a modified asphalt coating waterproofing composition for composite waterproofing comprising:

The polymer modifier is based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer, 80 to 120 parts by weight of a polyether-polyamide block copolymer (EBA), 40 parts by weight of a styrene-isoprene-styrene (SIS) block copolymer to 60 parts by weight, 30 to 50 parts by weight of an olefin-maleic anhydride copolymer, 1 to 10 parts by weight of polyrotaxane, 0.1 to 5 parts by weight of dipotassium glycyrrhizinate, and 0.1 to 5 parts by weight of dithiothreitol;

The filler is based on 100 parts by weight of calcium carbonate, 30 to 50 parts by weight of slaked lime, 10 to 30 parts by weight of bentonite, zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) 1 to 10 parts by weight, 1 to 10 parts by weight of aluminum hydroxide, 0.1 to 5 parts by weight of magnesium diboride powder;

The self-healing agent contains 50 to 80 parts by weight of a nylon resin and 50 to 80 parts by weight of a polyethylene terephthalate based on 100 parts by weight of the ionomer resin;

The plasticizer provides a modified asphalt coating film waterproofing composition for bridge surface composite waterproofing comprising 30 to 50% by weight of vegetable oil containing fatty acids and 50 to 70% by weight of tall oil pitch.

According to the modified asphalt coating waterproofing composition for bridge surface composite waterproofing according to one embodiment of the present invention and the bridge surface composite waterproofing construction method using the same, there is an effect that can implement excellent waterproofing, adhesion and tensile performance. In particular, by forming a composite waterproofing layer of the modified asphalt coating waterproofing material composition for bridge surface composite waterproofing on the base surface and simultaneously laying the asphalt felt sheet continuously to form a perfectly integrated composite waterproofing layer of the asphalt felt sheet, the overlap of the asphalt felt sheets The part is completely sealed and a composite waterproofing layer of uniform thickness can be obtained, so that the waterproofing rate is improved, and the construction can be done safely and easily.

In addition, it is perfectly integrated with a rigid concrete structure having different coefficients of thermal expansion with excellent adhesion, and has excellent crack followability due to shear stress, thereby effectively preventing cracking, lifting or peeling.

In addition, the crack followability due to shrinkage/expansion according to the temperature change of the structures of buildings and bridges is very good, and the waterproof layer does not break during the expansion and contraction according to the climate change, so the risk of water leakage is small, and it has excellent durability against alkalis and acids, It has the effect of contributing to the extension of the lifespan of buildings and bridges.

More specifically, the modified asphalt coating film waterproofing composition for bridge surface composite waterproofing according to an embodiment of the present invention comprises 30 to 70 wt% of straight asphalt, 10 to 30 wt% of a polymer modifier, 5 to 20 wt% of a filler, 1 to 5 wt% of a medium temperature additive %, a self-healing agent 1 to 5 wt%, a plasticizer 1 to 5 wt%, a flame retardant 1 to 5 wt%, and a curing regulator 0.1 to 1 wt%.

First, the straight asphalt provides excellent waterproofing properties, and functions to improve adhesion, adhesion and tensile performance. In addition, by improving the fluidity by lowering the melting point, excellent work performance can be provided, and the elongation is excellent, and the crack followability by shear stress is very excellent, and cracking, lifting or peeling can be effectively prevented. It works.

As the straight asphalt, KS F 4052 asphalt for waterproofing construction may be preferably used. More preferably, 3 or 5 types may be used, and in the present invention, 5 types having a penetration of 80 to 100 mm may be used.

The straight asphalt is preferably contained in the range of 30 to 70 wt% in the modified asphalt coating film waterproofing composition for bridge surface composite waterproofing according to an embodiment of the present invention in consideration of the above-described improvement effect. When the content of the straight asphalt is too small, there is a problem that the above improvement effect may be insufficient, and when the content of the straight asphalt is too large, the adhesion performance is rather reduced and the hardness is excessively increased, so that the resistance to cracking is lowered There are problems that could be.

On the other hand, the polymer modifier shortens the compatibility and reaction time with straight asphalt, modifies the low-temperature properties of asphalt, implements excellent waterproofing, adhesion and tensile performance, and increases the elastic strength to improve the impact resistance performance and , thermal stability, crack resistance, plastic deformation resistance, weather resistance, warpage estimation, workability, etc. The polymer modifier functions to improve the durability performance by improving aging ability and weathering performance, which are disadvantages of straight asphalt.

As a result, it is perfectly integrated with a rigid concrete structure having different coefficients of thermal expansion with excellent adhesion, and has excellent crack followability due to shear stress, thereby effectively preventing cracking, lifting or peeling. In addition, it can withstand high heat during construction, and has excellent crack followability due to shrinkage/expansion according to temperature change of structures of buildings and bridges. It has excellent durability against alkali and acid, and can contribute to extending the lifespan of buildings and bridges.

The polymer modifier is preferably contained in the range of 10 to 30 wt% in the modified asphalt coating waterproofing material composition for bridge surface composite waterproofing according to an embodiment of the present invention in consideration of the above-described improvement effect. When the content of the polymer modifier is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the polymer modifier is too large, compatibility with straight asphalt is reduced, and material separation phenomenon There is a problem.

More specifically, the polymer modifier is based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer, 80 to 120 parts by weight of the polyether-polyamide block copolymer (EBA), styrene-isoprene-styrene (SIS) 40 to 60 parts by weight of block copolymer, 30 to 50 parts by weight of olefin-maleic anhydride copolymer, 1 to 10 parts by weight of polyrotaxane, 0.1 to 5 parts by weight of dipotassium glycyrrhizinate, and 0.1 to 5 parts by weight of dithiothreitol can be preferably used.

First, the styrene-butadiene-styrene (SBS) block copolymer not only provides excellent waterproof performance and improves strength, but also functions to improve elasticity, impact resistance and crack resistance due to high elongation. In addition, it secures heat resistance, modifies the low-temperature characteristics of asphalt, and functions to improve thermal stability, plastic deformation resistance, and warpage estimability.

Hereinafter, the content of other components constituting the polymer modifier is based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer.

The polyether-polyamide block copolymer (EBA) functions to secure heat resistance and weather resistance, modify low-temperature characteristics of asphalt, and improve thermal stability, plastic deformation resistance, warpage estimation and UV resistance performance.

The polyether-polyamide block copolymer (EBA) is preferably contained in an amount of 80 to 120 parts by weight based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer. When the content of the polyether-polyamide block copolymer (EBA) is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the polyether-polyamide block copolymer (EBA) is too large There is a problem that the stability and workability of the coating film may be deteriorated.

The styrene-isoprene-styrene (SIS) block copolymer not only provides excellent waterproof performance along with the styrene-butadiene-styrene (SBS) block copolymer and improves strength, but also has a high elongation, so elasticity, impact resistance and cracking It functions to improve resistance. In addition, it secures heat resistance, modifies the low-temperature characteristics of asphalt, and functions to improve thermal stability, plastic deformation resistance, and warpage estimability.

The styrene-isoprene-styrene (SIS) block copolymer is preferably contained in an amount of 40 to 60 parts by weight based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer. When the content of the styrene-isoprene-styrene (SIS) block copolymer is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the styrene-isoprene-styrene (SIS) block copolymer is too large There is a problem in that the manufacturing process time increases and the viscosity increases, which may decrease productivity.

The olefin-maleic anhydride copolymer functions to implement excellent adhesive strength and tensile strength.

The olefin-maleic anhydride copolymer is an alternating copolymer in which an olefin selected from the group consisting of octene, hexene, dodecene, dodecene-1 and tetradecene and maleic anhydride are alternated in a molar ratio of 1:1. The above improvement effect can be further improved by using phosphorus.

The olefin-maleic anhydride copolymer is preferably contained in an amount of 30 to 50 parts by weight based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer. When the content of the olefin-maleic anhydride copolymer is too small, the above improvement effect may be insufficient. When the content of the olefin-maleic anhydride copolymer is too large, the manufacturing process time increases and the viscosity There is a problem that the increase in productivity may decrease.

The polyrotaxane provides tensile force by stress applied in the longitudinal and transverse directions, greatly improving crack resistance, and providing excellent durability, thermal stability, plastic deformation resistance, weather resistance, warpage estimation, workability, etc. do.

The polyrotaxane is a cyclodextrin cyclic molecule, a polybutadiene linear molecule that is skewered in the opening of the cyclodextrin cyclic molecule, and is disposed at both ends of the polybutadiene linear molecule to prevent detachment of the cyclodextrin cyclic molecule having a blocker that prevents; All or part of the hydroxyl group of the cyclodextrin is substituted with a sulfonic acid group or a sulfuric ester group; The blocking group disposed at both ends of the polybutadiene linear molecule to prevent detachment of the cyclodextrin cyclic molecule includes an anthracene-sorbitol ethoxylate complex represented by the following formula (1). In addition, there is an effect that can further improve more excellent adhesion, strength, impermeability, etc.

[Formula 1]

In the above formula, n is an integer from 2 to 10.

In this case, the blocking groups disposed at both ends of the polybutadiene linear molecule to prevent the detachment of the cyclodextrin cyclic molecule are dinitrophenyl groups, cyclodextrins, adamantane groups, trityl groups, fluoresceins, pyrenes. Or it may further include anthracene. More specifically, the blocking groups disposed at both ends of the polybutadiene linear molecule to prevent detachment of the cyclodextrin cyclic molecule are dinitrophenyl groups, cyclodextrins, adamantane groups, trityl groups, and fluoresceins. , a blocking group of pyrenes or anthracenes: and an anthracene-sorbitol ethoxylate complex represented by Formula 1 may be used more preferably in a molar ratio of 2 to 10: 1.

In addition, the polyrotaxane can be prepared by a method generally used in the art, and the method is not particularly limited, but for example, it is obtained by spray-drying an aqueous dispersion of the polyrotaxane; After drying the aqueous dispersion of the polyrotaxane by freeze-drying or drying under reduced pressure at 70° C. or less, it is preferably obtained by pulverizing.

The polyrotaxane is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer. When the content of the polyrotaxane is too small, there is a problem that the above improvement effect may be insufficient. There is a problem that this can be degraded.

The dipotassium glycyrrhizinate can greatly improve waterproof performance, high temperature and low temperature performance, and in particular, provides improved crack resistance and high temperature plastic deformation resistance, can withstand high heat during construction, excellent durability, adhesion, thermal stability, It functions to provide crack resistance, plastic deformation resistance, weather resistance, abrasion resistance, impermeability, warpage estimation, and workability.

The dipotassium glycyrrhizinate is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer. When the content of the dipotassium glycyrrhizinate is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the dipotassium glycyrrhizinate is too large, the workability is reduced or the manufacturing cost is increased, which can lower the price competitiveness There is a problem.

The dithiothreitol functions to provide excellent durability, weather resistance, abrasion resistance, and workability. In addition, it has excellent storage stability according to temperature change, and functions to enable uniform and efficient process management.

The dithiothreitol is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer. When the content of dithiothreitol is too small, there is a problem that the above-described improvement effect may be insufficient. There are possible problems.

On the other hand, the filler fills the pores to form a stable coating film, improves compressive strength, hardness and abrasion resistance, and provides durability such as excellent alkali resistance, chloride ion penetration resistance, weather resistance, and water impermeability.

The filler is preferably contained in the range of 5 to 20% by weight in the modified asphalt coating waterproofing composition for bridge surface composite waterproofing according to an embodiment of the present invention in consideration of the above-described improvement effect. When the content of the filler is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the filler is too large, the waterproofness and workability are lowered or the manufacturing cost is increased, so that price competitiveness may be lowered. There is this.

More specifically, the filler is based on 100 parts by weight of calcium carbonate, 30 to 50 parts by weight of slaked lime, 10 to 30 parts by weight of bentonite, zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) 1 to 10 parts by weight, aluminum hydroxide 1 to 10 parts by weight, 0.1 to 5 parts by weight of magnesium diboride powder may be preferably used.

First, the calcium carbonate fills the pores to form a stable coating film, and functions to provide excellent compressive strength, alkali resistance, and chloride ion penetration resistance.

Hereinafter, the content of other components constituting the filler is based on 100 parts by weight of the calcium carbonate.

The slaked lime fills pores to form a stable coating film, prevents peeling, and inhibits aging to improve long-term durability and increase viscosity to improve fatigue resistance of the composition.

The slaked lime is preferably contained in an amount of 30 to 50 parts by weight based on 100 parts by weight of the calcium carbonate. When the content of the slaked lime is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the slaked lime is too large, there is a problem that strength characteristics and durability may be deteriorated.

The bentonite functions to fill pores to form a stable coating film, to improve compressive strength, hardness, and abrasion resistance, and to provide excellent impermeability and durability.

The bentonite is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the calcium carbonate. When the content of the bentonite is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the bentonite is too large, there is a problem that strength characteristics and durability may be deteriorated.

The zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) fills pores to form a stable coating film, improves compressive strength, hardness and abrasion resistance, and has excellent alkali resistance, chloride ion penetration resistance, weather resistance, water impermeability, etc. It provides durability.

The zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is a plate-shaped zinc phosphate, which can further improve the above-described effects and provide excellent thermal stability, so that it can withstand high heat during construction and excellent The performance of plastic deformation resistance and warpage estimation can be further improved.

More specifically, the plate-shaped zinc phosphate is prepared by dissolving zinc hydroxide in water or hydrochloric acid diluted to a concentration of 15 to 30% by weight; preparing a precipitate of zinc carbonate while slowly adding an aqueous carbonate solution having a concentration of 15 to 30 wt% to the solution dropwise; preparing a plate-shaped zinc phosphate precipitate while slowly adding dropwise an aqueous phosphate solution having a concentration of 15 to 30 wt % to the solution containing the zinc carbonate precipitate; It is prepared by a manufacturing method comprising the steps of filtering, washing and drying the solution containing the plate-shaped zinc phosphate precipitate, and an average particle diameter of 0.1 to 3 μm may be preferably used.

In this case, the carbonate may preferably be at least one selected from the group consisting of sodium carbonate, sodium bicarbonate, ammonium carbonate, ammonium bicarbonate, and mixtures thereof; The phosphate salt may preferably be at least one selected from the group consisting of potassium phosphate, potassium monobasic, dipotassium phosphate, ammonium phosphate, monobasic ammonium phosphate, diammonium phosphate, and mixtures thereof.

In addition, preparing a plate-shaped zinc phosphate precipitate while slowly adding an aqueous solution of 15 to 30% by weight of a phosphate solution dropwise to the solution containing the zinc carbonate precipitate; 100 parts by weight of the solution containing the zinc carbonate precipitate After further mixing 0.1 to 5 parts by weight of the cobweb hydrolyzate, and then slowly adding an aqueous solution of phosphate having a concentration of 15 to 30% by weight dropwise thereto to prepare a plate-shaped zinc phosphate precipitate, the above effect can be further improved However, there is an effect that can provide durability such as more excellent alkali resistance, chloride ion penetration resistance, weather resistance, and the like.

At this time, the hydrolyzate of the spider silk is prepared by a manufacturing method comprising the steps of hydrolyzing the spider silk with hydrochloric acid of 5 to 20 times the weight and 0.5 to 8N, and concentrating the hydrolyzate under reduced pressure, followed by freeze-drying and powdering it may be

The zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the calcium carbonate. When the content of the zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is too large There is a problem that the manufacturing cost increases and the price competitiveness may decrease.

The aluminum hydroxide fills pores to form a stable coating film, improves compressive strength, hardness and abrasion resistance, and provides durability such as excellent thermal stability, acid resistance, chloride ion penetration resistance, weather resistance, and impermeability. .

The aluminum hydroxide may preferably have an average particle diameter of 10 to 50 μm.

In addition, by modifying the surface of the aluminum hydroxide to be hydrophobic, the above-described effect can be further improved, and the compatibility of the composition can be further improved, so that excellent waterproofness and impermeability can be greatly improved, and workability is greatly improved. has the effect of being

More specifically, the surface of the aluminum hydroxide modified to be hydrophobic is aluminum hydroxide having an average particle diameter of 10 to 50 μm, 0.5 to 10 vol% of liquid alkane and the remaining amount of the solvent After input to an alkane solution, 500 to Stirring at a speed of 1000 RPM so that the liquid alkane is adsorbed to the aluminum hydroxide particles; And after removing the solvent, drying may be prepared by a manufacturing method comprising a.

At this time, the liquid alkane is nonane (C ₉ H ₂₀ ), decane (C ₁₀ H ₂₂ ), undecane (C ₁₁ H ₂₄ ), dodecane (C ₁₂ H ₂₆ ), tridecane (C ₁₃ H ₂₈ ), At least one selected from the group consisting of tetradecane (C ₁₄ H ₃₀ ), pentadecane (C ₁₅ H ₃₂ ), hexadecane (C ₁₆ H ₃₄ ), and mixtures thereof may be preferably used. More preferably, nonane (C ₉ H ₂₀ ) and tetradecane (C ₁₄ H ₃₀ ) are mixed in a volume ratio of 1: 0.5 to 1 to further improve the above effect. In addition, the solvent may preferably be at least one selected from the group consisting of n-hexane (n-Hexane), n-octane (n-Octane), and mixtures thereof.

The aluminum hydroxide is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the calcium carbonate. When the content of the aluminum hydroxide is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the aluminum hydroxide is too large, the manufacturing cost increases and the price competitiveness may decrease.

The magnesium diboride powder functions to fill pores to form a stable coating film, to improve compressive strength, hardness, and abrasion resistance, and to provide durability such as excellent thermal stability.

The magnesium diboride powder is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the calcium carbonate. When the content of the magnesium diboride powder is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the magnesium diboride powder is too large, the manufacturing cost increases and the price competitiveness may decrease. .

On the other hand, the medium temperature additive effectively lowers the viscosity, increases the compatibility, and reduces the melt viscosity of asphalt to improve workability, compaction, durability, long-term storage, and noise reduction characteristics.

More specifically, the medium temperature additive is paraffin wax, microcrystalline wax, montan wax, sasol wax, carnauba wax, PE-wax, EVA-wax, PP-wax, hydrogenated castor oil, hydroxy stearic acid (Hydroxy Stearic Acid) , aliphatic petroleum resin, aromatic petroleum resin, petroleum resin in which aliphatic and aromatic coexist, 1,2-hydroxystearic acid, lauric acid amide, bisamide wax (Ethylene-Bis-Stearamide), stearic acid amide , oleic acid amide, ercaic acid amide, N-oleyl stearic acid amide, N-stearyl stearic acid amide, N-stearyl ercaic acid amide, di-heptane decyl ketone (stearone: CH3(CH3) 16-CO-(CH3) ) 16CH3), pine tar, rosin, rosin salt, and at least one selected from the group consisting of mixtures thereof may be preferably used.

In consideration of the above-described improvement effect, the medium temperature additive is preferably contained in an amount of 1 to 5% by weight in the modified asphalt coating waterproofing material composition for a bridge surface composite waterproofing according to an embodiment of the present invention. When the content of the medium-temperature additive is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the medium-temperature additive is too large, there is a problem that strength and durability performance may be reduced.

On the other hand, the self-healing agent not only heals microcracks, prevents and prevents larger cracks, but also improves adhesive strength and tensile strength by enhancing cohesion by incorporating a polymer having high molecular bonding strength in the composition. .

The self-healing agent is preferably contained in an amount of 1 to 5% by weight in the modified asphalt coating waterproofing composition for a bridge surface composite waterproofing according to an embodiment of the present invention in consideration of the above-described improvement effect. When the content of the self-healing agent is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the self-healing agent is too large, there is a problem that durability may be reduced.

More specifically, the self-healing agent may preferably include 50 to 80 parts by weight of a nylon resin and 50 to 80 parts by weight of a polyethylene terephthalate based on 100 parts by weight of the ionomer resin.

First, the ionomer resin enhances cohesion, thereby healing microcracks and preventing and preventing larger cracks, as well as reducing surface porosity to improve weather resistance.

The ionomer resin is an ionomer resin made by crosslinking a metal ion to an ethylene methacrylic acid copolymer, and the metal ion is magnesium, calcium, zinc, aluminum, lithium, nickel or sodium. can For example, the ionomer resin is commercially available from DuPont, and Sullin® 9970 or Sullin® 9975 may be used.

Hereinafter, the content of other components constituting the self-healing agent is based on 100 parts by weight of the ionomer resin.

The nylon resin not only heals microcracks, prevents and prevents larger cracks, but also improves adhesive strength and tensile strength.

The nylon resin is preferably contained in an amount of 50 to 80 parts by weight based on 100 parts by weight of the ionomer resin. When the content of the nylon resin is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the nylon resin is too large, there is a problem that durability may be reduced.

The polyethylene terephthalate functions to heal microcracks, prevent and prevent larger cracks, as well as improve adhesive strength and tensile strength.

The polyethylene terephthalate is preferably contained in an amount of 50 to 80 parts by weight based on 100 parts by weight of the ionomer resin. When the content of the polyethylene terephthalate is too small, there is a problem that the improvement effect may be insufficient, and when the content of the polyethylene terephthalate is too large, there is a problem that durability may be reduced.

On the other hand, the plasticizer functions to reduce the viscosity of the composition to improve workability and improve flexibility.

More specifically, the plasticizer may be preferably used containing 30 to 50% by weight of vegetable oil containing fatty acids and 50 to 70% by weight of tall oil pitch.

In this case, as the vegetable oil containing the fatty acid, soybean oil, castor oil, palm oil, rapeseed oil, sunflower oil (sunflower oil), corn oil (corn oil) and At least one selected from the group consisting of mixtures thereof may be preferably used. More preferably, sunflower oil may be used.

In consideration of the above-described improvement effect, the plasticizer is preferably contained in the range of 1 to 5% by weight in the modified asphalt coating waterproofing material composition for a bridge surface composite waterproofing according to an embodiment of the present invention. When the content of the plasticizer is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the plasticizer is too large, there is a problem that strength and durability may be reduced.

On the other hand, the flame retardant functions to prevent the asphalt from burning in the process of heating the composition to cause a chemical reaction.

The flame retardant is melamine phosphate (melamine phosphate), melamine pyrophosphate (melamine pyrophosphate), ammonium polyphosphate (ammonium polyphosphate), alkyl amine phosphate (alkylamine phosphate), piperazine acid polyphosphate (piperazine acid polyphosphate) and mixtures thereof At least one nitrogen-phosphorus-containing flame retardant selected from the group consisting of may be preferably used. More preferably, a mixture of melamine pyrophosphate and piperazine acid polyphosphate in a 1: 1 weight ratio can be preferably used.

In consideration of the above-described improvement effect, the flame retardant is preferably contained in the range of 1 to 5% by weight in the modified asphalt coating waterproofing composition for bridge surface composite waterproofing according to an embodiment of the present invention. If the content of the flame retardant is too small, there is a problem that the improvement effect may be insufficient, and if the content of the flame retardant is too large, there is a problem that strength and durability may be reduced.

On the other hand, the curing control agent can shorten the curing time, prevent drying shrinkage, and improve crack resistance at low temperatures.

The curing modifier consists of diethylene glycol, ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, neopentyl glycol, 1,4-butylene glycol, 1,3-butylene glycol, and mixtures thereof. At least one selected from the group may be preferably used.

In consideration of the above-described improvement effect, the curing modifier is preferably contained in an amount of 0.1 to 1% by weight in the modified asphalt coating waterproofing material composition for a bridge surface composite waterproofing according to an embodiment of the present invention. When the content of the curing regulator is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the curing regulator is too large, there is a problem that strength and durability may be reduced.

The modified asphalt coating film waterproofing material composition for a bridge surface composite waterproofing according to an embodiment of the present invention can be applied to construction by mixing at a temperature of 120 to 200 °C.

In addition, another embodiment of the present invention is a bridge surface composite waterproofing construction method using the modified asphalt coating waterproofing material composition for the bridge surface composite waterproofing,

After cutting the pavement of the old bridge surface, removing foreign substances and cutting the protruding part to keep it flat to arrange the base surface; a primer layer forming step of forming a primer layer by applying a primer to the bridge surface; forming a waterproofing coating layer by applying a modified asphalt coating waterproofing composition for bridge surface composite waterproofing on top of the primer layer; forming a sheet waterproofing layer by attaching an asphalt felt sheet to an upper portion of the coating film waterproofing layer; After pouring asphalt concrete on top of the sheet waterproofing layer, compacting and curing provides a bridge surface composite waterproofing construction method comprising the step of forming an asphalt concrete layer. The construction flow chart and actual construction image of the bridge surface composite waterproofing construction method using the modified asphalt coating waterproofing material composition for the bridge surface composite waterproofing according to an embodiment of the present invention are shown in FIGS. 1 and 2, respectively.

In this case, the primer may preferably include a methyl methacrylate-based resin having a viscosity of 5 to 25 cps, a shear adhesive strength of 10 to 30 MPa, and a tensile elongation of 5 to 90%.

In addition, the asphalt felt sheet is made by impregnating a central reinforcing material comprising a polyester long fiber or short fiber nonwoven fabric into the modified asphalt coating waterproofing material composition for bridge surface composite waterproofing, and then attaching silica sand or aluminum oxide to the upper surface, lower surface or both surfaces. The finished one can be preferably used.

In this case, the lower surface of the asphalt felt sheet may be configured to further include a medium-density polyethylene (MDPE) layer.

In addition, the asphalt concrete may include 88 to 93% by weight of aggregate and 7 to 12% by weight of the modified asphalt waterproofing composition for composite waterproofing of the bridge.

At this time, the aggregate is a mineral material for construction that can be agglomerated with the modified asphalt coating waterproofing composition for bridge surface composite waterproofing to form a lump, and is chemically stable. Preferred examples of such aggregates include sand, gravel, basalt, sulphur, basalt, other similar materials, or mixtures thereof.

According to the size of these aggregates, 0.074mm or more and less than 4.76mm are called fine aggregates, and those of 4.76mm or more are called coarse aggregates. The aggregate that can be used in the present invention is generally used in the art, and the amount of aggregate used is not particularly limited, but more preferably 95 to 100% by weight pass through a 13mm sieve, and 65 to 85% by weight in a 5mm sieve. pass, 45-62 wt% pass through a sieve of 2.36 mm, 35-50 wt% pass through a sieve of 0.6 mm, 28-42 wt% pass through a sieve of 0.3 mm, 25-34 wt% pass through a sieve of 0.15 mm, Aggregate selected by passing 20 to 26% by weight through a sieve of 0.08mm can be preferably used. However, since the present invention is not limited thereto, the mixing amount of the fine aggregate and the coarse aggregate included in the aggregate may be appropriately adjusted as necessary.

According to the modified asphalt coating waterproofing composition for bridge surface composite waterproofing according to an embodiment of the present invention and the bridge surface composite waterproofing construction method using the same, there is an effect that can implement excellent waterproofing, adhesion and tensile performance. In particular, by forming a composite waterproofing layer of the modified asphalt coating waterproofing material composition for bridge surface composite waterproofing on the base surface and simultaneously laying the asphalt felt sheet continuously to form a perfectly integrated composite waterproofing layer of the asphalt felt sheet, the overlap of the asphalt felt sheets The part is completely sealed and a composite waterproofing layer of uniform thickness can be obtained, so that the waterproofing rate is improved, and the construction can be done safely and easily.

In addition, it is perfectly integrated with a rigid concrete structure having different coefficients of thermal expansion with excellent adhesion, and has excellent crack followability due to shear stress, thereby effectively preventing cracking, lifting or peeling.

In addition, the crack followability due to shrinkage/expansion according to the temperature change of the structures of buildings and bridges is very good, and the waterproof layer does not break during the expansion and contraction according to the climate change, so the risk of water leakage is small, and it has excellent durability against alkalis and acids, It has the effect of contributing to the extension of the lifespan of buildings and bridges.

As mentioned above, although preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical spirit of the present invention. This is possible.

<Production Example 1>

Preparation of polyrotaxane

As a polyrotaxane, a cyclodextrin cyclic molecule, a polybutadiene linear molecule that is skewered in the opening of the cyclodextrin cyclic molecule, and a polybutadiene linear molecule disposed at both ends of the cyclodextrin cyclic molecule to prevent detachment of the cyclodextrin cyclic molecule having a blocking group (anthracene group) that prevents; Among the hydroxyl groups of the cyclodextrin, those in which 50% were substituted with sulfate ester groups were used.

<Preparation Example 2>

Preparation of polyrotaxane

As a polyrotaxane, a cyclodextrin cyclic molecule, a polybutadiene linear molecule that is skewered in the opening of the cyclodextrin cyclic molecule, and a polybutadiene linear molecule disposed at both ends of the cyclodextrin cyclic molecule to prevent detachment of the cyclodextrin cyclic molecule having a blocker that prevents; Among the hydroxyl groups of the cyclodextrin, those in which 50% were substituted with sulfate ester groups were used.

At this time, the blocking group disposed at both ends of the polybutadiene linear molecule to prevent the detachment of the cyclodextrin cyclic molecule includes an anthracene group and an anthracene-sorbitol ethoxylate complex represented by Formula 1-1 in a molar ratio of 5 to 1 What was included was used.

[Formula 1-1]

In the above formula, n is 2.

<Production Example 3>

Manufacture of plate-shaped zinc phosphate

Zinc hydroxide is mixed with water or hydrochloric acid diluted to a concentration of 20% by weight, heated and dissolved on a hot plate, cooled, and then an aqueous solution of sodium carbonate having a concentration of 20% by weight is slowly added dropwise to the solution. A precipitate was prepared. While the solution containing the zinc carbonate precipitate was stirred at 500 rpm, an aqueous solution of sodium phosphate monobasic (NaH ₂ PO ₄ ) having a concentration of 20 wt% was slowly added dropwise to prepare a plate-shaped zinc phosphate precipitate. Thereafter, the solution containing the plate-shaped zinc phosphate precipitate was filtered and washed three times, and then heated and dried in an oven at 100° C. to prepare a plate-shaped zinc phosphate powder having an average particle diameter of 0.51 μm.

<Production Example 4>

Manufacture of plate-shaped zinc phosphate

Zinc hydroxide is mixed with water or hydrochloric acid diluted to a concentration of 20% by weight, heated and dissolved on a hot plate, cooled, and then an aqueous solution of sodium carbonate having a concentration of 20% by weight is slowly added dropwise to the solution. A precipitate was prepared. After adding 2.5 parts by weight of hydrolyzate of spider silk to 100 parts by weight of the solution containing the zinc carbonate precipitate, and stirring the mixture at 500 rpm, sodium phosphate monobasic (NaH ₂ PO ₄ ) aqueous solution having a concentration of 20% by weight was slowly added dropwise to prepare a plate-shaped zinc phosphate precipitate to which the hydrolyzate of spider silk was bound. Thereafter, the solution containing the plate-shaped zinc phosphate precipitates bound to the spider silk hydrolyzate was filtered and washed three times, and then heated and dried in an oven at 100 ° C. to prepare a plate-shaped zinc phosphate powder having an average particle diameter of 0.9 μm. .

At this time, the spider silk hydrolyzate hydrolyzed the spider silk collected from the wild and indoors by stirring it in a 10-fold weight 1N HCl solution for 3 hours, then neutralizing the spider silk with a 1N NaOH solution. After that, the hydrolyzate was decompressed. After concentration, lyophilization was performed to powder, and the prepared product was used.

<Preparation Example 5>

Preparation of aluminum hydroxide with a hydrophobically modified surface

After adding aluminum hydroxide having an average particle diameter of about 29 μm to an alkane solution containing 5 vol% of decane (C ₁₀ H ₂₂ ) and the remaining amount of a solvent (n-octane (n-Octane)), at a speed of 900 RPM It was stirred so that the alkane was adsorbed to the aluminum hydroxide particles. Thereafter, by drying in an oven at 120° C. for 30 minutes to remove the solvent, and then naturally drying for 1 day, aluminum hydroxide with a hydrophobically modified surface was prepared.

<Preparation Example 6>

Preparation of aluminum hydroxide with a hydrophobically modified surface

Aluminum hydroxide having an average particle diameter of about 29 μm, nonane (C ₉ H ₂₀ ) 4 volume %, tetradecane (C ₁₄ H ₃₀ ) 2 volume %, and the remaining amount of a solvent (n-octane (n-Octane)) containing After being added to the alkane solution, the mixture was stirred at a speed of 900 RPM so that the alkane was adsorbed to the aluminum hydroxide particles. Thereafter, by drying in an oven at 120° C. for 30 minutes to remove the solvent, and then naturally drying for 1 day, aluminum hydroxide with a hydrophobically modified surface was prepared.

<Examples 1 to 3 and Comparative Examples 1 to 2>

Manufacture of modified asphalt coating waterproofing composition for bridge surface composite waterproofing

A modified asphalt coating waterproofing material composition for bridge surface composite waterproofing and a composition for comparison were prepared by mixing the components and content conditions as shown in Table 1 below.

Category (wt%) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 5 kinds of straight asphalt 58 58 58 58 58 polymer modifier 18 18 18 20 18 (parts by weight) Styrene-butadiene-styrene (SBS) block copolymer 100 100 100 100 100 Polyether-polyamide block copolymer (EBA) 80 80 80 0 0 Styrene-isoprene-styrene (SIS) block copolymer 50 50 50 0 50 Olefin-maleic anhydride copolymer ⁽¹⁾ 37 37 37 0 0 polyrotaxane 8
[Production Example 1] 8
[Production Example 1] 8
[Production Example 2] 0 0 Dipotassium glycyrrhizinate 3 3 3 0 0 dithiothreitol 2 2 2 0 0 filler 12 12 12 13 12 (parts by weight) calcium carbonate 100 100 100 100 100 slaked lime 37 37 37 0 37 bentonite 19 19 19 0 19 zinc phosphate 7
[normal
zinc phosphate
powder] 7
[Production Example 3] 7
[Production Example 4] 0 0 aluminum hydroxide 5.5
[normal
aluminum hydroxide powder] 5.5
[Production Example 5] 5.5
[Production Example 6] 0 0 Magnesium Diboride Powder 1.5 1.5 1.5 0 0 medium temperature additive 3 3 3 3 3 (parts by weight) paraffin wax 100 100 100 0 100 PE-wax 0 0 100 100 0 stearic acid amide 0 100 100 0 0 self-healing agent 3 3 3 0 3 (parts by weight) ionomer resin
[Sullin® 9970 ] 100 100 100 0 100 nylon resin 55 55 55 0 0 Polyethylene terephthalate 75 75 75 0 0 plasticizer ⁽²⁾ 3.5 3.5 3.5 3.5 3.5 flame retardant 2 2 2 2 2 (parts by weight) Ammonium Polyphosphate 100 0 0 100 0 Melamine Pyrophosphate 100 100 100 0 100 piperazine acid polyphosphate 0 100 100 0 0 Curing Regulator [Ethylene Glycol] 0.5 0.5 0.5 0.5 0.5 ⁽¹⁾ Olefin-maleic anhydride copolymer: An alternating copolymer of hexene and maleic anhydride in a molar ratio of 1:1 is used.
⁽²⁾ Plasticizer: A mixture of 43% by weight of sunflower oil and 57% by weight of tall oil pitch is used.

<Examples 4 to 6 and Comparative Examples 3 to 4>

Production of Asphalt Felt Sheet

After impregnating the center reinforcing material composed of polyester long fiber nonwoven fabric into the modified asphalt coating waterproofing material composition for bridge surface composite waterproofing according to Examples 1 to 3 and the comparative composition according to Comparative Examples 1 and 2, respectively, on both sides By attaching silica sand and finishing, an asphalt felt sheet was prepared.

The following test examples show experimental results of comparing the characteristics of the Examples and Comparative Examples according to the present invention in order to more easily grasp the characteristics of the Examples according to the present invention disclosed above.

<Test Example 1>

For the modified asphalt coating waterproofing composition for bridge surface composite waterproofing according to Examples 1 to 3 and the composition for comparison according to Comparative Examples 1 and 2, a physical property test according to the quality standard (KS F 4932) of the coating film waterproofing material for a concrete bridge surface was carried out, and the results are shown in Table 2 below.

Item standard Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Seal
Performance tensile strength
(N/㎟) unprocessed 1.5 or higher 1.6 1.8 2.0 1.0 1.3 alkali treatment More than 80% of untreated 1.3 1.7 1.8 0.7 0.9 heat treatment More than 80% of untreated 1.4 1.6 1.7 0.7 0.8 elongation
(%) unprocessed over 100 105 108 109 98 101 alkali treatment More than 80% of untreated 99 101 103 79 85 heat treatment More than 80% of untreated 97 98 100 77 83 shear
adhesion
Performance Shear adhesive strength
(N/㎟) -20℃ 0.8 or higher 0.9 0.9 1.1 0.4 0.7 20℃ 0.15 or more 0.18 0.20 0.21 0.13 0.15 shear adhesion
Strain (%) -20℃ 0.5 or more 0.6 0.7 0.9 0.1 0.4 20℃ 1.0 or higher 1.3 1.4 1.6 0.5 0.8 Tensile Adhesive Strength
(N/㎟) -20℃ 1.2 or higher 1.4 1.7 1.8 0.9 1.2 20℃ 0.6 or higher 0.8 0.9 1.2 0.4 0.6 water permeability won't pitch not pitched
not not pitched
not not pitched
not not pitched
not not pitched
not Chloride ion penetration resistance (coulombs) 100 or less 95 83 78 192 98 dent there will be no holes clear clear clear clear clear Heat resistance dimensional stability (%) 150℃, 30 minutes within ±2.0 0.9 0.5 0.2 2.9 1.8 fatigue resistance No cracks, tears or breakage clear clear clear clear clear crack resistance -20℃ Cracks, rips, breaks
won't happen clear clear clear balance clear low temperature flexibility -10℃ there will be no cracks clear clear clear crack generation clear

As shown in Table 2, the modified asphalt coating film waterproofing material composition for bridge surface composite waterproofing according to Examples 1 to 3 of the present invention compared with the comparative compositions according to Comparative Examples 1 and 2, showed excellent performance. .

<Test Example 2>

For the asphalt felt sheets according to Examples 4 to 6 and Comparative Examples 3 and 4, a physical property test was performed according to the quality standards for waterproofing materials for concrete bridge surfaces (KS F 4931), and the results are shown in Table 3 below. indicated.

Item standard Example 4 Example 5 Example 6 Comparative Example 3 Comparative Example 4 Seal
Performance tensile strength
(N/㎟) unprocessed 4.0 or higher 4.8 5.1 5.3 2.9 4.1 alkali treatment More than 80% of untreated 3.9 4.3 4.3 2.2 3.3 heat treatment More than 80% of untreated 4.1 4.4 4.5 2.1 3.2 elongation
(%) unprocessed 20-60 51 55 57 26 42 alkali treatment More than 80% of untreated 43 46 45 18 35 heat treatment More than 80% of untreated 45 47 47 20 34 shear
adhesion
Performance Shear adhesive strength
(N/㎟) -10℃ 1.0 or higher 1.6 1.9 2.1 1.0 1.2 23℃ 0.2 or more 0.3 0.5 0.5 0.03 0.1 shear adhesion
Strain (%) -10℃ 0.5 or more 0.6 0.8 0.9 0.1 0.3 23℃ 1.0 or higher 1.6 1.9 2.0 0.8 1.1 Tensile Adhesive Strength
(N/㎟) -10℃ 1.5 or higher 2.0 2.2 2.4 1.1 1.5 23℃ 0.8 or higher 1.5 1.8 1.9 0.4 0.9 water permeability won't pitch not pitched
not not pitched
not not pitched
not not pitched
not not pitched
not Chloride ion penetration resistance (coulombs) 100 or less 39 31 27 110 86 dent there will be no holes clear clear clear clear clear Heat resistance dimensional stability (%) 150℃, 30 minutes within ±2.0 1.7 1.5 1.3 2.8 2.1 fatigue resistance No cracks, tears or breakage clear clear clear clear clear crack resistance -10℃ Cracks, rips, breaks
won't happen clear clear clear clear clear Water Immersion Tensile Adhesion 20℃ 70% or more before water immersion 1.3 1.5 1.5 0.2 0.6 low temperature flexibility -10℃ no cracks clear clear clear crack generation clear fatigue crack test -10℃ No cracks, tears or breakage clear clear clear balance clear

As shown in Table 3, the asphalt felt sheets according to Examples 4 to 6 of the present invention showed excellent performance compared to the asphalt felt sheets according to Comparative Examples 3 and 4.

As described above, those skilled in the art to which the present invention pertains will understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that all of the embodiments described above are illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention, rather than the above detailed description, all changes or modifications derived from the meaning and scope of the claims to be described later and their equivalents.

Claims (6)

30 to 70% by weight of straight asphalt, 10 to 30% by weight of polymer modifier, 5 to 20% by weight of filler, 1 to 5% by weight of medium temperature additive, 1 to 5% by weight of self-healing agent, 1 to 5% by weight of plasticizer, 1 to 5% by weight of flame retardant As a modified asphalt coating waterproofing material composition for bridge surface composite waterproofing comprising 5% by weight and 0.1 to 1% by weight of a curing regulator,
The polymer modifier is based on 100 parts by weight of the styrene-butadiene-styrene (SBS) block copolymer, polyether-polyamide block copolymer (EBA) 80 to 120 parts by weight, styrene-isoprene-styrene (SIS) block copolymer 40 to 60 parts by weight, 30 to 50 parts by weight of an olefin-maleic anhydride copolymer, 1 to 10 parts by weight of polyrotaxane, 0.1 to 5 parts by weight of dipotassium glycyrrhizinate, and 0.1 to 5 parts by weight of dithiothreitol;
The filler is based on 100 parts by weight of calcium carbonate, 30 to 50 parts by weight of slaked lime, 10 to 30 parts by weight of bentonite, zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) 1 to 10 parts by weight, 1 to 10 parts by weight of aluminum hydroxide, 0.1 to 5 parts by weight of magnesium diboride powder;
The self-healing agent contains 50 to 80 parts by weight of a nylon resin and 50 to 80 parts by weight of a polyethylene terephthalate based on 100 parts by weight of the ionomer resin;
The plasticizer comprises 30 to 50% by weight of vegetable oil containing fatty acids and 50 to 70% by weight of tall oil pitch.
According to claim 1,
The polyrotaxane is a cyclodextrin cyclic molecule, a polybutadiene linear molecule that is skewered in the opening of the cyclodextrin cyclic molecule, and is disposed at both ends of the polybutadiene linear molecule to prevent detachment of the cyclodextrin cyclic molecule having a blocker that prevents;
All or part of the hydroxyl group of the cyclodextrin is substituted with a sulfonic acid group or a sulfuric ester group;
The blocking group disposed at both ends of the polybutadiene linear molecule to prevent detachment of the cyclodextrin cyclic molecule comprises an anthracene-sorbitol ethoxylate complex represented by the following formula (1) waterproofing composition.
[Formula 1]

In the above formula, n is an integer from 2 to 10.
According to claim 1,
The zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is a plate-shaped zinc phosphate;
The plate-shaped zinc phosphate is prepared by dissolving zinc hydroxide in water or hydrochloric acid diluted to a concentration of 15 to 30% by weight; preparing a precipitate of zinc carbonate while slowly adding an aqueous carbonate solution having a concentration of 15 to 30 wt % to the solution dropwise; preparing a plate-shaped zinc phosphate precipitate while slowly adding dropwise an aqueous phosphate solution having a concentration of 15 to 30 wt % to the solution containing the zinc carbonate precipitate; A modified asphalt coating film waterproofing composition for bridge surface composite waterproofing, characterized in that it is prepared by a manufacturing method comprising the steps of filtering, washing and drying the solution containing the plate-shaped zinc phosphate precipitate.
4. The method of claim 3,
preparing a plate-shaped zinc phosphate precipitate while slowly adding dropwise an aqueous solution of 15 to 30% by weight of phosphate to the solution containing the zinc carbonate precipitate;
0.1 to 5 parts by weight of the cobweb hydrolyzate is further mixed with 100 parts by weight of the solution containing the zinc carbonate precipitate, and then an aqueous phosphate solution having a concentration of 15 to 30% by weight is slowly added dropwise thereto to prepare a plate-shaped zinc phosphate precipitate. is performed;
The spider silk hydrolyzate is prepared by a manufacturing method comprising the steps of hydrolyzing the spider silk with 5 to 20 times the weight and 0.5 to 8N hydrochloric acid, and concentrating the hydrolyzate under reduced pressure, then freeze-drying to powder Modified asphalt coating waterproofing composition for bridge surface composite waterproofing.
As a bridge surface composite waterproofing construction method using the modified asphalt coating film waterproofing composition for composite waterproofing of a bridge according to any one of claims 1 to 4,
After cutting the pavement of the old bridge surface, removing foreign substances and cutting the protruding part to keep it flat to arrange the base surface; a primer layer forming step of forming a primer layer by applying a primer to the bridge surface; forming a waterproofing coating layer by applying a modified asphalt coating waterproofing composition for bridge surface composite waterproofing on top of the primer layer; forming a sheet waterproofing layer by attaching an asphalt felt sheet to an upper portion of the coating film waterproofing layer; After pouring asphalt concrete on top of the sheet waterproofing layer, compacting and curing the asphalt concrete layer, characterized in that it comprises the step of forming an asphalt concrete layer.
6. The method of claim 5,
The primer is to include a methyl methacrylate-based resin having a viscosity of 5 to 25 cps, a shear adhesive strength of 10 to 30 MPa, and a tensile elongation of 5 to 90%;
The asphalt felt sheet is made by impregnating a central reinforcement comprising a polyester long fiber or short fiber nonwoven fabric in the modified asphalt coating waterproofing material composition for bridge surface composite waterproofing, and then attaching silica sand or aluminum oxide to the top, bottom or both sides to finish. will;
The asphalt concrete is a bridge surface composite waterproofing construction method, characterized in that it comprises 88 to 93% by weight of aggregate and 7 to 12% by weight of the modified asphalt coating film waterproofing composition for the bridge surface composite waterproofing.

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