KR102660241B1 - Asphalt-based functional coating waterproofing composition for bridge surfaces and constructing method of bridge surface waterproofing using the same - Google Patents

Abstract

The present invention relates to an asphalt-based functional coating film waterproofing composition for bridge surfaces and a bridge waterproofing construction method using the same, and more specifically, 70 to 80% by weight of straight asphalt, 5 to 15% by weight of functional resin-based admixture, and 1 to 10% by weight of functional filler. , 1 to 10% by weight of a petroleum resin and 0.1 to 5% by weight of a plasticizer, wherein the functional resin-based admixture is 100 parts by weight of styrene-ethylene-butylene-styrene (SEBS) block copolymer and styrene-isoprene-styrene (SIS). Contains 20 to 30 parts by weight of block copolymer, 20 to 30 parts by weight of t-butylcyclohexyl (meth)acrylate, and 1 to 10 parts by weight of bis(3-triethoxysilylpropyl)tetra sulfide (TSS), and the above functional The filler contains 100 parts by weight of silica, 1 to 30 parts by weight of alumina ceramics, 1 to 30 parts by weight of potassium titanate whiskers or surface-treated potassium titanate whiskers, and 1 to 10 parts by weight of blast furnace slag, and the surface-treated potassium titanate whiskers are titanic acid. Preparing a mixture by ball milling 100 parts by weight of potassium whisker, 100 to 300 parts by weight of silicone oil, and 1 to 10 parts by weight of hesperidin, dispersing the mixture in toluene and then separating it with a centrifuge to obtain surface-treated titanic acid. By preparing by a method comprising preparing potassium whiskers;
It can improve adhesion performance such as tensile adhesive strength, shear adhesive strength, and resilience such as tensile strength, elongation, shear adhesive strain (%), and heat resistance and dimensional stability. It also dramatically reduces performance degradation due to temperature changes, providing cold resistance. It can achieve excellent physical properties such as adhesion, resilience, strength and hardness, and has improved waterproofing, water repellent function, and durability against alkalis and acids, effectively preventing damage such as cracking and deformation due to physical and chemical deterioration. It relates to an asphalt-based functional coating waterproofing material composition for bridge surfaces and a bridge waterproofing construction method using the same.

Description

Asphalt-based functional coating waterproofing composition for bridge surfaces and bridge surface waterproofing construction method using the same {Asphalt-based functional coating waterproofing composition for bridge surfaces and constructing method of bridge surface waterproofing using the same}

The present invention can improve adhesion performance such as tensile adhesive strength and shear adhesive strength, and resilience such as tensile strength, elongation, shear adhesive strain (%), and heat resistance dimensional stability, and dramatically reduces performance degradation due to temperature changes. In addition to cold resistance, it can achieve excellent physical properties such as adhesion, resilience, strength, and hardness, and has improved waterproofing, water repellent function, and durability against alkalis and acids, preventing damage such as cracking and deformation due to physical and chemical deterioration. It relates to an asphalt-based functional coating waterproofing material composition for bridge surfaces that can effectively prevent bridge surfaces and a bridge waterproofing construction method using the same.

In general, the construction or repair method for the concrete pavement layer or asphalt pavement layer paved on bridges, etc. is to lay a waterproof layer on the poured concrete slab of the bridge surface, and then construct a concrete pavement layer that becomes the road surface on top, or an asphalt pavement layer. Construction is in progress.

However, in the slab of a bridge, cracks and gaps occur due to physical and chemical deterioration due to infiltration of rainwater and vehicle loads, which not only allows moisture such as rainwater to infiltrate the concrete slab, but also causes temperature rise in the summer and freeze-thawing effects in the winter. Deterioration due to repetition and penetration of chlorides from snow removal materials are frequent.

This not only accelerates corrosion of the reinforcing bars of the concrete slab that forms the framework of the bridge, reducing the durability and lifespan of the bridge, but also has a negative impact on the safety of the bridge. Therefore, for the safety of bridges, waterproofing of bridge surfaces is very important, and various methods for this purpose have been proposed and used.

A commonly used waterproofing method for bridge surfaces is the film-type waterproofing method, which involves applying an asphalt film waterproofing material. The paint-based waterproofing method has the advantage of forming an asphalt waterproofing film by applying a liquid asphalt-based coating waterproofing material to the substrate multiple times, making it easy to transport and construct the material, and allowing easy construction even on highly curved or complex substrates. there is.

These asphalt-based coating waterproofing materials are made by mixing asphalt with a styrene-based polymer, ethylene-vinyl acetate, or styrene-butadiene latex, and modifying it to have properties that asphalt cannot have, such as excellent elongation, crack resistance, cold resistance, and bonding properties. will be. In addition, surfactants or curing accelerators are added to further enhance heat resistance, strength, and hardness, and some also include thermoplastic elastomers.

The asphalt-based coating waterproofing material has the disadvantage of being vulnerable to separation at the interface between asphalt and concrete (adhesiveness), flow on the bridge surface (elasticity), and water or moisture penetration (waterproofing) due to shrinkage cracks due to seasonal temperature differences. Therefore, it is very vulnerable to environmental conditions during construction. For example, during the rainy season, the variable differences in environmental conditions during construction are high, so it is difficult to expect a waterproofing effect of the product being constructed.

In particular, in the case of coating waterproofing materials mainly composed of styrene butadiene rubber (SBR), the resilience is very weak, so when repeatedly stretched, deterioration occurs and inherent physical properties are lost, which leads to a decrease in quality. There is a problem. In addition, in the case of coating waterproofing materials containing SBR as a main ingredient, there is a problem in that the quality deteriorates rapidly when exposed to various chemicals for a long period of time due to weak chemical resistance.

In order to improve these problems, various improvement measures have been proposed, but the degree of quality improvement is insufficient, so their development is urgently needed.

Republic of Korea Patent No. 10-1954235 Japanese Patent No. 10-07102138 Republic of Korea Patent Publication No. 10-2010-0004159

The present invention was devised to solve the above-mentioned problems, and one embodiment of the present invention not only improves the low resilience and chemical resistance caused by the use of styrene butadiene-based rubber components, but also improves adhesion with concrete and asphalt pavement layers. The purpose is to provide an asphalt-based functional coating waterproofing material composition for bridge surfaces that improves bonding strength and resistance to water and chloride penetrating from the pavement layer, and a bridge waterproofing construction method for new construction and repair using the same.

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

One embodiment of the present invention includes 70 to 80% by weight of straight asphalt, 5 to 15% by weight of a functional resin-based admixture, 1 to 10% by weight of a functional filler, 1 to 10% by weight of a petroleum resin, and 0.1 to 5% by weight of a plasticizer,

The functional resin-based admixture

100 parts by weight of styrene-ethylene-butylene-styrene (SEBS) block copolymer, 20 to 30 parts by weight of styrene-isoprene-styrene (SIS) block copolymer, 20 to 30 parts by weight of t-butylcyclohexyl (meth)acrylate and 1 to 10 parts by weight of bis(3-triethoxysilylpropyl)tetra sulfide (TSS),

The functional filler is

Containing 100 parts by weight of silica, 1 to 30 parts by weight of alumina ceramics, 1 to 30 parts by weight of potassium titanate whiskers or surface-treated potassium titanate whiskers, and 1 to 10 parts by weight of blast furnace slag,

The surface-treated potassium titanate whisker is

Preparing a mixture by ball milling 100 parts by weight of potassium titanate whisker, 100 to 300 parts by weight of silicone oil, and 1 to 10 parts by weight of hesperidin, dispersing the mixture in toluene and then separating it with a centrifuge to treat the surface. Provided is an asphalt-based functional coating film waterproofing composition for bridge surfaces, which is manufactured by a method comprising the step of producing potassium titanate whiskers.

The alumina ceramics are

Preparing a wet slurry by mixing 100 parts by weight of alumina powder, 0.00005 to 0.0005 parts by weight of yttrium powder, 0.1 to 1 part by weight of bisphenol A type epoxy resin, and 1000 to 1500 parts by weight of ethanol; Spray drying the wet slurry to produce granular powder; Manufacturing the green compact by molding the granular powder; Preliminarily sintering the green compact at a temperature of 1000 to 1300° C. to produce a pre-sintered body; Processing the pre-sintered body by HIP (Hot isostatic press) at a temperature of 1000 to 1300° C. and a pressure of 100 to 250 MPa to produce a sintered body obtained by HIP; and manufacturing alumina ceramics by annealing the sintered body obtained through HIP at 700 to 1100° C.

The wet slurry is

Additionally containing 0.1 to 10 parts by weight of barium sulfate powder;

The step of manufacturing the green compact is

It may be manufactured by a method including a primary molding step of press molding the granular powder under a pressure of 7 to 13 MPa and a secondary molding step of cold isostatic pressure molding under a pressure of 110 to 170 MPa.

The functional resin-based admixture

further containing 1 to 10 parts by weight of an active hydrogen-containing compound having a nitroxide group;

The active hydrogen-containing compound having the nitroxide group is 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-hydroxy-2,2,6,6-tetraethylpiperi Dean 1-oxyl, 4-amino-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-amino-2,2,6,6-tetraethylpiperidine 1-oxyl, 3-hyde Roxy-2,2,5,5-tetramethylpiperidine 1-oxyl, 3-hydroxy-2,2,5,5-tetraethylpiperidine 1-oxyl, 3-amino-2,2,5 , 5-tetramethylpyrrolidine 1-oxyl and 3-amino-2,2,5,5-tetraethylpyrrolidin 1-oxyl.

In addition, another embodiment of the present invention is a bridge waterproofing construction method for new construction and repair using the asphalt-based functional coating waterproofing composition for bridge surfaces,

A step of removing deteriorated areas and foreign substances from the bridge surface construction target and cleaning them to organize the base surface; Forming an asphalt waterproofing layer by applying the asphalt-based functional coating waterproofing composition for bridge surfaces; installing protective material; And it provides a bridge waterproofing construction method that includes the step of forming an asphalt pavement layer by paving the bridge surface by laying and compacting asphalt concrete.

The bridge waterproofing construction method further includes the step of applying a primer to form a primer layer,

A step of removing deteriorated areas and foreign substances from the bridge surface construction target and cleaning them to organize the base surface; Forming a primer layer by applying a primer; Forming an asphalt waterproofing layer by applying the asphalt-based functional coating waterproofing composition for bridge surfaces; installing protective material; And it may include the step of forming an asphalt pavement layer by paving the bridge surface by laying and compacting asphalt concrete.

According to an asphalt-based functional coating waterproofing material composition for bridge surfaces and a bridge waterproofing construction method using the same according to an embodiment of the present invention, adhesion performance such as tensile bond strength and shear bond strength, tensile strength, elongation, shear bond strain (%), and It has the advantage of improving resilience, such as heat resistance and dimensional stability. In addition, it is possible to realize excellent adhesion performance and resilience by dramatically reducing physical property changes due to temperature changes, that is, performance degradation due to temperature changes, and maintains excellent physical properties such as adhesion, resilience, strength, and hardness along with cold resistance. There are benefits to this. In addition, it has the advantage of improved waterproofing, water repellent function, and durability against alkalis and acids, effectively preventing damage such as cracking and deformation due to physical and chemical deterioration. As described above, the highly durable modified asphalt coating waterproofing composition for bridge surfaces according to the present invention can extend the lifespan and reduce maintenance costs.

Figure 1 shows a schematic construction flow chart of a bridge waterproofing construction method according to various embodiments of the present invention.
Figure 2 shows a schematic construction flow chart of a bridge waterproofing construction method according to various embodiments of the present invention, which further includes the step of forming a primer layer.

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

One embodiment of the present invention includes 70 to 80% by weight of straight asphalt, 5 to 15% by weight of a functional resin-based admixture, 1 to 10% by weight of a functional filler, 1 to 10% by weight of a petroleum resin, and 0.1 to 5% by weight of a plasticizer,

The functional resin-based admixture includes 100 parts by weight of styrene-ethylene-butylene-styrene (SEBS) block copolymer, 20 to 30 parts by weight of styrene-isoprene-styrene (SIS) block copolymer, and t-butylcyclohexyl (meth)acrylate. Contains 20 to 30 parts by weight and 1 to 10 parts by weight of bis(3-triethoxysilylpropyl)tetra sulfide (TSS),

The functional filler contains 100 parts by weight of silica, 1 to 30 parts by weight of alumina ceramics, 1 to 30 parts by weight of potassium titanate whiskers or surface-treated potassium titanate whiskers, and 1 to 10 parts by weight of blast furnace slag,

The surface-treated potassium titanate whisker is prepared by ball milling 100 parts by weight of potassium titanate whisker, 100 to 300 parts by weight of silicone oil, and 1 to 10 parts by weight of hesperidin to prepare a mixture, and then dispersing the mixture in toluene. Provided is an asphalt-based functional coating waterproofing material composition for bridge surfaces, which is manufactured by a method comprising the step of separating by centrifugation and producing surface-treated potassium titanate whiskers.

According to an asphalt-based functional coating waterproofing material composition for bridge surfaces and a bridge waterproofing construction method using the same according to an embodiment of the present invention, adhesion performance such as tensile bond strength and shear bond strength, tensile strength, elongation, shear bond strain (%), and It has the advantage of improving resilience, such as heat resistance and dimensional stability. In addition, it is possible to realize excellent adhesion performance and resilience by dramatically reducing physical property changes due to temperature changes, that is, performance degradation due to temperature changes, and maintains excellent physical properties such as adhesion, resilience, strength, and hardness along with cold resistance. There are benefits to this. In addition, it has the advantage of improved waterproofing, water repellent function, and durability against alkalis and acids, effectively preventing damage such as cracking and deformation due to physical and chemical deterioration. As described above, the highly durable modified asphalt coating waterproofing composition for bridge surfaces according to the present invention can extend the lifespan and reduce maintenance costs.

The asphalt-based functional coating film waterproofing material composition for bridge surfaces according to an embodiment of the present invention includes 70 to 80% by weight of straight asphalt, 5 to 15% by weight of functional resin-based admixture, 1 to 10% by weight of functional filler, 1 to 10% by weight of petroleum resin, and Contains 0.1 to 5% by weight of plasticizer.

More specifically, the straight asphalt of the present invention provides excellent waterproofing properties and has good compatibility with the asphalt pavement layer, thereby improving adhesion, adhesion, and tensile performance. In addition, by lowering the melting point and improving fluidity, it can provide excellent work performance and has excellent elongation, so it has excellent crack tracking due to shear stress, effectively preventing cracking, lifting, or peeling. It works.

The straight asphalt may be AP-3 or AP-5 straight asphalt.

The straight asphalt is preferably contained in the range of 70 to 80% by weight in the asphalt-based functional coating waterproofing composition for bridge surfaces of the present invention. If the content of the straight asphalt is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the straight asphalt is too high, the adhesion performance is reduced and the hardness is excessively increased, resulting in a decrease in resistance to cracking. There is a problem that can arise.

The functional resin-based admixture of the present invention improves adhesion performance such as excellent tensile adhesive strength and shear adhesive strength without deteriorating performance due to temperature changes, and resilience such as tensile strength, elongation, shear adhesive strain (%), and heat-resistant dimensional stability. It plays a role. In addition, it provides an asphalt waterproofing layer with excellent resistance to water and chloride penetrating from the pavement layer, improves responsiveness to cracks in the base surface and followability to the expansion and contraction behavior of the structure due to temperature and climate changes, and provides waterproofing and water repellent. It functions to improve durability against alkalis and acids.

The functional resin-based admixture is preferably contained in the range of 5 to 15% by weight in the asphalt-based functional coating film waterproofing composition for bridge surfaces of the present invention. If the content of the functional resin-based admixture is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the functional resin-based admixture is too high, it is difficult to expect any further improvement effect, which may reduce price competitiveness. There is a problem.

The functional resin-based admixture includes 100 parts by weight of styrene-ethylene-butylene-styrene (SEBS) block copolymer, 20 to 30 parts by weight of styrene-isoprene-styrene (SIS) block copolymer, and t-butylcyclohexyl (meth)acrylic. Those containing 20 to 30 parts by weight of rate and 1 to 10 parts by weight of bis(3-triethoxysilylpropyl)tetra sulfide (TSS) can be preferably used.

More specifically, the styrene-ethylene-butylene-styrene (SEBS) block copolymer provides excellent waterproofing, water resistance, adhesiveness, and tensile performance, and has high elongation, thereby improving elasticity, impact, and crack resistance. In addition, heat resistance and shear bond strain (%) are greatly improved, providing excellent heat resistance and dimensional stability. It also functions to modify the low-temperature properties of asphalt and improve thermal stability, plastic deformation resistance, and warpage estimation.

Hereinafter, the content of other components constituting the functional resin-based admixture is based on 100 parts by weight of the styrene-ethylene-butylene-styrene (SEBS) block copolymer.

The styrene-isoprene-styrene (SIS) block copolymer, together with the styrene-ethylene-butylene-styrene (SEBS) block copolymer, provides excellent waterproofing, water resistance, adhesiveness and tensile performance, and has high elongation, making it elastic, impact and It plays a role in improving crack resistance. In addition, heat resistance and shear bond strain (%) are greatly improved, providing excellent heat resistance and dimensional stability. In particular, it plays a role in improving freezing resistance, strength, and hardness.

The styrene-isoprene-styrene (SIS) block copolymer is preferably contained in the range of 20 to 30 parts by weight based on 100 parts by weight of the styrene-ethylene-butylene-styrene (SEBS) block copolymer. If the content of the styrene-isoprene-styrene (SIS) block copolymer is too small, there is a problem that the improvement effect may be insufficient, and if the content of the styrene-isoprene-styrene (SIS) block copolymer is too high, There is a problem that material separation may occur.

The t-butylcyclohexyl (meth)acrylate provides excellent water resistance and tensile performance, and has improved heat resistance, thermal stability, and shear bond strain (%), providing excellent heat resistance dimensional stability, plastic deformation resistance, and bending estimation. It plays a role.

The t-butylcyclohexyl (meth)acrylate is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the styrene-ethylene-butylene-styrene (SEBS) block copolymer. If the content of t-butylcyclohexyl (meth)acrylate is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of t-butylcyclohexyl (meth)acrylate is too high, the improvement effect may be insufficient. There is a problem that water resistance may be reduced.

The bis(3-triethoxysilylpropyl)tetra sulfide (TSS) improves miscibility with the functional filler and straight asphalt, providing excellent waterproofing and water repellent functions as well as excellent tensile strength, elongation, tensile adhesive strength, and shear strength. It plays a role in improving adhesive strength, shear bond strain (%), and heat-resistant dimensional stability.

The bis(3-triethoxysilylpropyl)tetra sulfide (TSS) is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the styrene-ethylene-butylene-styrene (SEBS) block copolymer. . If the content of bis(3-triethoxysilylpropyl)tetra sulfide (TSS) is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and the bis(3-triethoxysilylpropyl)tetra sulfide (TSS) If the content of TSS (TSS) is too high, it is difficult to expect any further performance improvement, which may lead to a decrease in price competitiveness.

In addition, the functional resin-based admixture according to the present invention may further contain an active hydrogen-containing compound having a nitroxide group. The active hydrogen-containing compound having the nitroxide group serves to improve water repellency, water resistance, durability against alkali, acid, heat resistance, physical and chemical stability, and resistance to cracking, deformation, etc. In addition, it improves workability by adjusting high temperature fluidity and provides excellent corrosion and aging prevention effects.

Active hydrogen-containing compounds having such a nitroxide group include 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-hydroxy-2,2,6,6-tetraethylpiperi Dean 1-oxyl, 4-amino-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-amino-2,2,6,6-tetraethylpiperidine 1-oxyl, 3-hyde Roxy-2,2,5,5-tetramethylpiperidine 1-oxyl, 3-hydroxy-2,2,5,5-tetraethylpiperidine 1-oxyl, 3-amino-2,2,5 , 5-tetramethylpyrrolidine 1-oxyl and 3-amino-2,2,5,5-tetraethylpyrrolidin 1-oxyl.

The active hydrogen-containing compound having a nitroxide group is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the styrene-ethylene-butylene-styrene (SEBS) block copolymer.

The functional filler of the present invention serves to provide excellent waterproofing performance by filling the voids in the waterproof layer of the coating film to form a watertight and stable coating film. In addition, it improves the strength performance, hardness, abrasion resistance, and dent resistance of the waterproof coating film at high and low temperatures, and has excellent chemical resistance, chloride ion penetration resistance, waterproofing and water repellent functions, weather resistance, water resistance, heat resistance, dimensional stability, etc. It has the function of providing durability such as low-temperature flexibility.

The functional filler is preferably contained in the range of 1 to 10% by weight in the asphalt-based functional coating waterproofing composition for bridge surfaces of the present invention. If the content of the functional filler is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the functional filler is too high, it is difficult to expect any further improvement effect, which may reduce price competitiveness. There is.

More specifically, the functional filler is preferably used containing 100 parts by weight of silica, 1 to 30 parts by weight of alumina ceramics, 1 to 30 parts by weight of potassium titanate whiskers or surface-treated potassium titanate whiskers, and 1 to 10 parts by weight of blast furnace slag. You can.

The silica fills the voids in the waterproof layer of the coating film to form a watertight and stable coating film, and provides durability such as excellent chemical resistance, chloride ion penetration resistance, weather resistance, heat-resistant dimensional stability, and low-temperature bendability. do.

The silica may preferably have an average particle diameter of 1 to 10 μm.

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

The alumina ceramics are made by refining alumina (Al ₂ O ₃ ) using advanced technology and usually contain more than 80% by weight of alumina (Al ₂ O ₃ ). The alumina ceramic mix is easy to integrate with the concrete slab base surface and asphalt pavement layer, improves excellent mechanical strength, hardness, wear resistance, dent resistance, etc., and has excellent chemical resistance, chloride ion penetration resistance, weather resistance, and water permeability resistance. It plays a role in providing durability such as heat resistance, dimensional stability, and low temperature flexibility.

These alumina ceramics are not particularly limited to those commonly used in the art, and specifically, MAKEIT's alumina ceramics products can be used.

In order to further improve the above-described role and improve the change in physical properties due to temperature changes and the corrosion prevention performance of the coating film, alumina ceramics manufactured by the following method can be used.

Specifically, the alumina ceramics include preparing a wet slurry by mixing 100 parts by weight of alumina powder, 0.00005 to 0.0005 parts by weight of yttrium powder, 0.1 to 1 part by weight of bisphenol A type epoxy resin, and 1000 to 1500 parts by weight of ethanol; Spray drying the wet slurry to produce granular powder; Manufacturing the green compact by molding the granular powder; Preliminarily sintering the green compact at a temperature of 1000 to 1300° C. to produce a pre-sintered body; Processing the pre-sintered body by HIP (Hot isostatic press) at a temperature of 1000 to 1300° C. and a pressure of 100 to 250 MPa to produce a sintered body obtained by HIP; and manufacturing alumina ceramics by annealing the sintered body obtained through HIP at 700 to 1100° C.

The yttrium powder facilitates the formation of an alumina sintered body and serves to increase the strength of the manufactured alumina ceramics. The bisphenol A type epoxy resin binds alumina powder and yttrium powder and provides excellent mechanical strength such as durability of the coating layer and excellent adhesion to the substrate. The bisphenol A type epoxy resin has an epoxy equivalent of 150 to 350 g/eq, for example, bisphenol A diglycidyl ether, bisphenol A polypropylene oxide diglycidyl ether, and bisphenol A ethylene oxide diglycidyl. It may be one or more selected from the group consisting of ether, hydrogenated bisphenol A diglycidyl ether, and hydrogenated bisphenol A propylene oxide diglycidyl ether.

The step of pre-sintering the green compact serves to induce bonding force between alumina particles. In addition, HIP (Hot isostatic pressing) is a method in which the material to be processed is placed in a high pressure vessel and exposed to both high temperature and high pressure to apply isostatic pressure to the material through pressurized gas. Alumina ceramics obtained by this method has no pores and can maintain high strength. At this time, the HIP device is not particularly limited to those commonly used in the art.

Additionally, in the method of manufacturing the alumina ceramics, the wet slurry further contains 0.1 to 10 parts by weight of barium sulfate powder; The step of manufacturing the green compact includes a primary molding step of press molding the granular powder under a pressure of 7 to 13 MPa and a secondary molding step of cold isostatic pressure molding under a pressure of 110 to 170 MPa. It may be manufactured using a method. By sequentially performing two-step molding with the addition of the barium sulfate powder, alumina ceramics with improved durability and excellent wear resistance can be manufactured.

The CIP (Cold isostatic press) not only minimizes remaining pores formed in the molded body, but also prevents pressure media such as water or gas from penetrating into the molded body. At this time, the CIP device is not particularly limited to those commonly used in the art.

The alumina ceramics are preferably contained in the range of 1 to 30 parts by weight based on 100 parts by weight of the silica. If the content of the alumina ceramics is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the alumina ceramics is too high, it is difficult to expect any further performance improvement effect, which may reduce price competitiveness. There is.

The potassium titanate whisker or surface-treated potassium titanate whisker provides durability such as excellent chemical resistance, chloride ion penetration resistance, weather resistance, water permeability resistance, heat-resistant dimensional stability, and low-temperature bendability, and provides excellent workability by lowering the melting point. Do it. In particular, the surface-treated potassium titanate whisker improves dispersibility and improves miscibility with the functional resin-based admixture component, thereby playing a role in maintaining more uniform physical properties.

The surface-treated potassium titanate whisker is prepared by ball milling 100 parts by weight of potassium titanate whisker, 100 to 300 parts by weight of silicone oil, and 1 to 10 parts by weight of hesperidin to prepare a mixture, and then dispersing the mixture in toluene. It may be manufactured by a method that includes the step of separating by centrifuging and producing surface-treated potassium titanate whiskers.

Specifically, silicone oil is coated on the surface of the potassium titanate whiskers to prevent agglomeration between the potassium titanate whiskers, leading to uniform dispersion, and increasing miscibility with the functional resin admixture component to further improve the durability and wear resistance of the waterproofing coating film. It plays a role. Hesperidin plays a role in preventing deterioration in the performance of waterproofing materials by reducing changes in physical properties due to temperature changes.

The potassium titanate whisker or surface-treated potassium titanate whisker is preferably contained in the range of 1 to 30 parts by weight based on 100 parts by weight of the silica. If the content of the potassium titanate whiskers or the surface-treated potassium titanate whiskers is too small, there is a problem that the improvement effect may be insufficient, and if the content of the potassium titanate whiskers or the surface-treated potassium titanate whiskers is too high, the improvement effect may be insufficient. There is a problem that chemical properties may deteriorate.

The blast furnace slag fills the voids in the waterproof layer of the coating film to form a watertight and stable coating film, absorbs moisture to improve thermal stability and workability, and improves the strength and anti-corrosion performance of the coating film.

The blast furnace slag is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of silica. If the content of the blast furnace slag is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the blast furnace slag is too large, there is a problem that the strength performance may be reduced.

The petroleum resin of the present invention reduces viscosity, improves workability by increasing compatibility between polymers, mixing and processability, increases heat resistance to prevent dripping, has strong adhesion performance regardless of temperature changes, prevents cracking, and improves workability. In particular, it plays a role in preventing cracking at low temperatures, waterproofing, and long-term storage.

The petroleum resin may be one or more selected from the group consisting of C5 petroleum resin, C9 petroleum resin, and mixtures thereof.

The petroleum resin is preferably contained in the range of 1 to 10% by weight in the asphalt-based functional coating waterproofing composition for bridge surfaces of the present invention. If the content of the petroleum resin is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the petroleum resin is too large, the strength performance may decrease or the price may increase, which may reduce price competitiveness. There is a problem.

The plasticizer of the present invention reduces viscosity, improves workability by increasing compatibility, mixing, and processability between polymers, and further improves low-temperature flexibility and adhesion performance.

The types of plasticizers are not particularly limited as they are commonly used in the art, but non-limiting examples of the plasticizers include dioctyl phthalate (DOP), dibutyl phthalate (DBP), and diisononyl phthalate (DINP). ), phthalic acid esters, etc.; One or more types selected from the group consisting of glycol oil, mineral sprit oil, and mixtures thereof can be used.

The plasticizer is preferably contained in the range of 0.1 to 5% by weight in the asphalt-based functional coating waterproofing composition for bridge surfaces of the present invention. If the content of the plasticizer is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the plasticizer is too much, there is a problem that strength and durability may be reduced.

In addition, another embodiment of the present invention is a bridge waterproofing construction method using the asphalt-based functional coating waterproofing composition for bridge surfaces,

A step of removing deteriorated areas and foreign substances from the bridge surface construction target and cleaning them to organize the base surface; Forming an asphalt waterproofing layer by applying the asphalt-based functional coating waterproofing composition for bridge surfaces; installing protective material; And it provides a bridge waterproofing construction method for new construction and repair, which includes the step of forming an asphalt pavement layer by paving the bridge surface by laying and compacting asphalt concrete.

More specifically, the bridge surface construction target is the base surface of the bridge deck and can be applied to both concrete deck and steel deck.

In addition, the asphalt-based functional coating waterproofing composition for bridge surfaces of the present invention can achieve sufficient adhesion to the base surface, so the application of primer can be omitted, but it can achieve a better adhesion improvement effect and integration effect to the base surface. To this end, the step of applying a general primer commonly used in the art may be further included. As a result, it is possible to achieve better strength reinforcement effects, prevention of moisture build-up, and adhesion strengthening effects. These primers are commonly used in the art and are not particularly limited in type.

The bridge waterproofing construction method further includes the step of applying the primer to form a primer layer; removing deteriorated areas and foreign substances from the bridge surface construction target and then cleaning them to prepare the base surface; Forming a primer layer by applying a primer; Forming an asphalt waterproofing layer by applying the asphalt-based functional coating waterproofing composition for bridge surfaces; installing protective material; And it may include the step of forming an asphalt pavement layer by paving the bridge surface by laying and compacting asphalt concrete.

When the application of the primer is omitted, various construction flow charts of the bridge waterproofing construction method using the asphalt-based functional coating waterproofing composition for bridge surfaces according to an embodiment of the present invention are shown in FIG. 1. However, the various construction flowcharts of the bridge waterproofing construction method shown in Figure 1 are presented only as examples, and the bridge waterproofing construction method of the present invention is not limited thereto.

In addition, various construction flow charts of a bridge waterproofing construction method using an asphalt-based functional coating waterproofing composition for bridge surfaces according to an embodiment of the present invention, including the step of forming the primer layer, are shown in FIG. 2. However, the various construction flowcharts of the bridge waterproofing construction method shown in Figure 2 are presented only as examples, and the bridge waterproofing construction method of the present invention is not limited thereto.

In addition, the step of forming an asphalt waterproofing layer by applying the asphalt-based functional coating waterproofing composition for bridge surfaces may be performed using asphalt coating waterproofing heating equipment. The asphalt-based functional coating waterproofing composition for bridge surfaces can be applied after heating and melting at a temperature range of 180 to 220° C. and completely mixing them.

In addition, the asphalt-based functional coating waterproofing composition for bridge surfaces may be applied multiple times, ranging from 1 to 5 times, until the asphalt waterproofing layer has a thickness of 3 to 4 mm.

In addition, in the step of installing the protective material, the type of the protective material is not particularly limited as it is commonly used in the art, but includes, for example, glass fiber, carbon fiber, aramid fiber, Basalt fiber, and mixtures thereof. Based on one or more materials selected from the group consisting of fibers, those made into a net or grid shape and/or non-woven fabrics can be used. This has the effect of minimizing damage to the asphalt waterproofing layer, further reinforcing the strength of the bridge surface, and increasing durability by further suppressing crack progression and deformation.

In addition, after the step of installing the protective material, the step of forming an asphalt pavement layer can be performed by paving the bridge surface by laying and compacting asphalt concrete.

According to an asphalt-based functional coating waterproofing material composition for bridge surfaces and a bridge waterproofing construction method using the same according to an embodiment of the present invention, adhesion performance such as tensile adhesive strength and shear adhesive strength, tensile strength, elongation, shear adhesive strain (%), and It has the advantage of improving resilience, such as heat resistance and dimensional stability. In addition, it is possible to realize excellent adhesion performance and resilience by dramatically reducing physical property changes due to temperature changes, that is, performance degradation due to temperature changes, and maintains excellent physical properties such as adhesion, resilience, strength, and hardness along with cold resistance. There are benefits to this. In addition, it has the advantage of improved waterproofing, water repellent function, and durability against alkalis and acids, effectively preventing damage such as cracking and deformation due to physical and chemical deterioration. As described above, the highly durable modified asphalt coating waterproofing composition for bridge surfaces according to the present invention can extend the lifespan and reduce maintenance costs.

Above, the present invention has been described in detail with preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. This is possible.

[Production Example 1] Alumina ceramics

100 parts by weight of alumina powder (average particle diameter 0.2 ㎛, α-Al ₂ O ₃ ), 0.0001 parts by weight of yttrium powder (average particle diameter 30 ㎚, Y ₂ O ₃ ), diglycidyl ether of bisphenol A (epoxy equivalent 170 g/ eq) and 1300 parts by weight of ethanol were mixed for 20 hours to prepare a wet slurry. Afterwards, the wet slurry was spray dried in a spray dryer to prepare granular powder. Afterwards, the granular powder was press-molded under a pressure of about 10 MPa to produce a green compact. Thereafter, the green compact was pre-sintered in a vacuum of 1×10 ^-3 Pa at a temperature increase rate of 150° C./hr and a maximum temperature of 1200° C. to prepare a pre-sintered body. The pre-sintered body was subjected to HIP (Hot Isostatic Press) treatment under Ar gas, 1300°C, and 100 MPa conditions for 2 hours to prepare a sintered body obtained by HIP. Afterwards, the sintered body obtained through HIP was annealed in air at 900° C. for 6 hours to produce alumina ceramics.

[Production Example 2] Alumina ceramics

100 parts by weight of alumina powder (average particle diameter 0.2μm, α-Al ₂ O ₃ ), 0.0001 parts by weight of yttrium powder (average particle diameter 30 nm, Y ₂ O ₃ ), 5 parts by weight of barium sulfate powder, diglycidyl of bisphenol A A wet slurry was prepared by mixing ether (epoxy equivalent 170 g/eq) and 1300 parts by weight of ethanol for 20 hours. Afterwards, the wet slurry was spray dried in a spray dryer to prepare granular powder. Afterwards, the granular powder was first subjected to press molding under a pressure of about 10 MPa, and then secondarily subjected to cold isostatic press molding under a pressure of 150 MPa to produce a green compact. Thereafter, the green compact was preliminarily sintered in a vacuum of 1×10 ^-3 Pa at a temperature increase rate of 150°C/hr and a maximum temperature of 1200°C to prepare a presintered body. The pre-sintered body was subjected to HIP (Hot Isostatic Press) treatment under Ar gas, 1300°C, and 100 MPa conditions for 2 hours to produce a sintered body obtained by HIP. Afterwards, the sintered body obtained through HIP was annealed in air at 900° C. for 6 hours to produce alumina ceramics.

[Preparation Example 3] Surface treated potassium titanate whisker

A mixture was prepared by ball milling 100 parts by weight of potassium titanate whisker, 200 parts by weight of silicone oil (polydimethylsiloxane, trimethylsiloxy terminated, viscosity: 100 cSt), and 7 parts by weight of hesperidin for 24 hours at room temperature and pressure. Afterwards, the mixture was dispersed in toluene and separated by centrifugation to prepare surface-treated potassium titanate whiskers.

[Examples and Comparative Examples]

After stirring the ingredients and contents as shown in Table 1 below, mixing and melting at a temperature of about 200 ° C, an asphalt-based functional coating waterproofing material composition for bridge surfaces and a comparative composition were prepared.

Classification (weight%) Example 1 Example 2 Example 3 Comparative Example 1 Comparative example 2 Straight asphalt [AP-3] 73 73 73 73 73 Functional resin-based admixture 13 13 13 13 13 middle
quantity
wealth Styrene-ethylene-butylene-styrene (SEBS) block copolymer 100 100 100 100 100 Styrene-isoprene-styrene (SIS) block copolymer 22 22 22 - 22 t-Butylcyclohexyl (meth)acrylate 20 20 20 - - Bis(3-triethoxysilylpropyl)tetra sulfide 3 3 3 - - Active hydrogen-containing compounds with nitroxide groups 4-Hydroxy-2,2,6,6-tetramethylpiperidine1-oxyl - 5 3 - - 4-Amino-2,2,6,6-tetramethylpiperidine1-oxyl - - 2 - - Functional filler 7 7 7 7 7 middle
quantity
wealth silica 100 100 100 50 100 calcium carbonate - - - 50 - alumina ceramics 25 25
[Production Example 1] 25
[Production Example 2] - - alumina - - - - 25 Potassium titanate whisker 17 17
[Production Example 3] 17
[Production Example 3] - - blast furnace slag 5 5 5 - 5 C5 Petroleum Resin 4 4 4 4 4 Plasticizer_Mineral Sprit Oil 3 3 3 3 3 Styrene-ethylene-butylene-styrene (SEBS) block copolymer: KRATON company, KRATON G1650MU product
Alumina ceramics: MAKEIT company, alumina ceramics products

Hereinafter, in order to more easily understand the characteristics of the asphalt-based functional coating film waterproofing composition for bridge surfaces prepared according to Examples 1 to 3, the comparative compositions prepared according to the Examples according to the present invention and Comparative Examples 1 and 2 are presented. This shows experimental results comparing the characteristics of .

<Test example>

For the asphalt-based functional coating waterproofing material composition for bridge surfaces prepared according to Examples 1 to 3 and the comparative compositions prepared according to Comparative Examples 1 and 2, a physical property test according to the quality standards for coating waterproofing materials for concrete bridge surfaces (KS F 4932) was carried out, and the results are shown in Table 2 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative example 2 Workability Good Good Good Good Good Non-volatility (%) 87 88 91 67 75 Seal
Performance tensile strength
(N/㎟) Untreated 44 47 48 30 36 Alkaline treatment 40 40 42 23 30 Heat treatment 42 43 45 21 31 elongation rate
(%) Untreated 557 560 583 191 295 Alkaline treatment 545 549 564 157 265 Heat treatment 552 558 561 159 258 shear
adhesion
Performance Shear bond strength
(N/㎟) -20℃ 2.4 2.4 2.6 0.7 1.5 20℃ 1.8 1.9 2.1 0.4 1.1 Shear adhesion
Strain rate (%) -20℃ 0.7 0.8 0.9 0.4 0.6 20℃ 1.6 1.7 1.7 0.5 0.8 tensile bond strength
(N/㎟) -20℃ 1.7 1.8 1.9 0.5 0.7 20℃ 1.0 1.1 1.3 0.4 0.5 Permeability resistance Not a pitcher
No Not a pitcher
No Not a pitcher
No Occurrence of pitching Not a pitcher
No Resistance to chloride ion penetration (coulombs) 63 61 54 118 94 Chemical resistance (10% sulfuric acid) clear clear clear Occurrence of heaviness Occurrence of heaviness Chemical resistance (10% HCl) clear clear clear Occurrence of heaviness Occurrence of heaviness Chemical resistance (10% caustic soda) clear clear clear clear clear inner dent clear clear clear Hole occurrence clear Heat resistance dimension
stability(%) 150℃30 minutes 1.1 1.0 0.8 2.6 2.1 Fatigue resistance clear clear clear Balance generation clear Crack resistance -20℃ clear clear clear Balance generation Balance generation low temperature flexibility -10℃ clear clear clear Cracks occur clear Tensile adhesion after 7 days of immersion 20℃ 0.8 1.0 1.1 0.3 0.4

As shown in Table 2, the asphalt-based functional coating waterproofing material composition for bridge surfaces prepared according to Examples 1 to 3 of the present invention shows excellent performance compared to the comparative composition prepared according to Comparative Examples 1 and 2. I was able to confirm.

As described above, a person skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, all embodiments described above should be understood as illustrative and not restrictive. The scope of the present invention should be construed as including all changes or modified forms derived from the meaning and scope of the claims described below and their equivalent concepts rather than the detailed description above.

Claims (6)

Containing 70 to 80% by weight of straight asphalt, 5 to 15% by weight of functional resin-based admixture, 1 to 10% by weight of functional filler, 1 to 10% by weight of petroleum resin, and 0.1 to 5% by weight of plasticizer,
The functional resin-based admixture
100 parts by weight of styrene-ethylene-butylene-styrene (SEBS) block copolymer, 20 to 30 parts by weight of styrene-isoprene-styrene (SIS) block copolymer, 20 to 30 parts by weight of t-butylcyclohexyl (meth)acrylate and 1 to 10 parts by weight of bis(3-triethoxysilylpropyl)tetra sulfide (TSS),
The functional resin-based admixture further contains 1 to 10 parts by weight of an active hydrogen-containing compound having a nitroxide group;
The active hydrogen-containing compound having the nitroxide group is 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-hydroxy-2,2,6,6-tetraethylpiperi Dean 1-oxyl, 4-amino-2,2,6,6-tetramethylpiperidine 1-oxyl, 4-amino-2,2,6,6-tetraethylpiperidine 1-oxyl, 3-hyde Roxy-2,2,5,5-tetramethylpiperidine 1-oxyl, 3-hydroxy-2,2,5,5-tetraethylpiperidine 1-oxyl, 3-amino-2,2,5 , 5-tetramethylpyrrolidine 1-oxyl and 3-amino-2,2,5,5-tetraethylpyrrolidin 1-oxyl;
The functional filler is
Containing 100 parts by weight of silica, 1 to 30 parts by weight of alumina ceramics, 1 to 30 parts by weight of potassium titanate whiskers or surface-treated potassium titanate whiskers, and 1 to 10 parts by weight of blast furnace slag,
The surface-treated potassium titanate whisker is
Preparing a mixture by ball milling 100 parts by weight of potassium titanate whiskers, 100 to 300 parts by weight of silicone oil, and 1 to 10 parts by weight of hesperidin;
An asphalt-based functional coating waterproofing material composition for bridge surfaces manufactured by a method comprising the step of dispersing the mixture in toluene and then separating it with a centrifuge to prepare surface-treated potassium titanate whiskers.
According to paragraph 1,
The alumina ceramics are
Preparing a wet slurry by mixing 100 parts by weight of alumina powder, 0.00005 to 0.0005 parts by weight of yttrium powder, 0.1 to 1 part by weight of bisphenol A type epoxy resin, and 1000 to 1500 parts by weight of ethanol;
Spray drying the wet slurry to produce granular powder;
Manufacturing the green compact by molding the granular powder;
Preliminarily sintering the green compact at a temperature of 1000 to 1300° C. to produce a pre-sintered body;
Processing the pre-sintered body by HIP (Hot isostatic press) at a temperature of 1000 to 1300° C. and a pressure of 100 to 250 MPa to produce a sintered body obtained by HIP; and
An asphalt-based functional coating film waterproofing material composition for bridge surfaces, characterized in that it is manufactured by a method comprising the step of producing alumina ceramics by annealing the sintered body obtained by the HIP at 700 to 1100 ° C.
According to paragraph 2,
The wet slurry is
Additionally containing 0.1 to 10 parts by weight of barium sulfate powder;
The step of manufacturing the green compact is
A first molding step of press molding the granular powder under a pressure of 7 to 13 MPa,
An asphalt-based functional coating waterproofing material composition for bridge surfaces, characterized in that it is manufactured by a method comprising the step of secondary molding by cold isostatic pressure under a pressure of 110 to 170 MPa.
delete A bridge waterproofing construction method using the asphalt-based functional coating film waterproofing composition for bridge surfaces according to any one of claims 1 to 3, comprising:
A step of removing deteriorated areas and foreign substances from the bridge surface construction target and cleaning them to organize the base surface; Forming an asphalt waterproofing layer by applying the asphalt-based functional coating waterproofing composition for bridge surfaces; installing protective material; And a bridge waterproofing construction method for new construction and repair, comprising the step of paving the bridge surface by laying and compacting asphalt concrete, thereby forming an asphalt pavement layer.
According to clause 5,
The bridge waterproofing construction method further includes the step of applying a primer to form a primer layer,
A step of removing deteriorated areas and foreign substances from the bridge surface construction target and cleaning them to organize the base surface; Forming a primer layer by applying a primer; Forming an asphalt waterproofing layer by applying the asphalt-based functional coating waterproofing composition for bridge surfaces; installing protective material; And a bridge waterproofing construction method for new construction and repair, comprising the step of paving the bridge surface by laying and compacting asphalt concrete, thereby forming an asphalt pavement layer.