KR102641180B1 - Bridge deck waterproofing structure and bridge deck waterproofing construction method - Google Patents

Abstract

One embodiment of the present specification includes a first waterproofing layer sequentially formed on a concrete floor; second waterproof layer; and an asphalt pavement layer, wherein the first waterproofing layer is formed of a first waterproofing material composition including asphalt, a medium-temperature additive, a solvent, a petroleum hydrocarbon resin, and styrene-butadiene rubber, and the second waterproofing layer is formed of asphalt, a petroleum hydrocarbon resin, It is formed of a second waterproofing composition comprising styrene-butadiene rubber, a heavy paraffin distillate solvent extract, and a process oil, wherein the asphalt content contained in the second waterproofing composition is 1.2 of the asphalt content contained in the first waterproofing composition. Provides bridge waterproofing structure that is ~2 times that of the bridge.

Description

Bridge waterproofing structure and bridge waterproofing construction method {BRIDGE DECK WATERPROOFING STRUCTURE AND BRIDGE DECK WATERPROOFING CONSTRUCTION METHOD}

This specification relates to a bridge waterproofing structure and a bridge waterproofing construction method.

In general, the bonding strength between the asphalt and concrete materials of bridges and overpasses is prone to deterioration due to rainwater infiltration and accumulated traffic load. Additionally, when asphalt is applied on the steel plate or concrete top structure of a bridge or overpass, fine cracks may occur in the asphalt due to vehicle load and impact. When rainwater or condensation water penetrates into the upper plate through cracks in the asphalt's pores, shoulder area, median strip, and joints, it accelerates the cracking of the upper plate, and these cracks further expand over time. It can corrode the structure itself or the reinforcing bars or steel plates inside. This causes a decrease in the strength of the bridge concrete and a shortened lifespan of the structure, and in severe cases, it may cause the asphalt-containing asphalt pavement layer and the top plate to separate, or lead to the risk of collapse of the structure itself.

Waterproofing construction applied to concrete bridge surfaces is applied to prevent such damage, and must be performed to prevent deterioration of floor concrete and corrosion of reinforcing bars caused by water and chloride infiltrating from asphalt pavement.

However, the conventional waterproofing construction method has a problem in that the adhesive performance between the concrete layer and the asphalt pavement layer is significantly insufficient due to poor physical properties such as tensile adhesion. In addition, when there are many irregularities or voids in the exposed concrete floor of the bridge surface, the adhesion of the primer is reduced, which causes the ascon layer and the concrete layer to easily separate or fall off, which ultimately causes water or chloride to permeate from the bridge pavement layer. There is a problem in that it penetrates into the concrete floor plate of the bridge, causing the performance of the concrete bridge to deteriorate and deteriorate, or in severe cases, the reinforcing bars to corrode.

The description in this specification is intended to solve the problems of the above-described prior art, and one purpose of this specification is to provide a bridge waterproofing structure with excellent adhesion between the concrete floor and the waterproofing layer, and between the waterproofing layer and the asphalt pavement layer, and with excellent waterproofing properties and durability. It is provided.

Another purpose of the present specification is to provide a bridge waterproofing construction method that can be applied to the construction of a bridge waterproofing structure with excellent adhesion, waterproofing, and durability.

According to one aspect, a first waterproofing layer sequentially formed on the concrete floor surface; second waterproof layer; and an asphalt pavement layer, wherein the first waterproofing layer is formed of a first waterproofing material composition including asphalt, a medium-temperature additive, a solvent, a petroleum hydrocarbon resin, and styrene-butadiene rubber, and the second waterproofing layer is formed of asphalt, a petroleum hydrocarbon resin, It is formed of a second waterproofing composition comprising styrene-butadiene rubber, a heavy paraffin distillate solvent extract, and a process oil, wherein the asphalt content contained in the second waterproofing composition is 1.2 of the asphalt content contained in the first waterproofing composition. Provides bridge waterproofing structure that is ~2 times that of the bridge.

In one embodiment, the first waterproofing composition includes 35 to 50% by weight of asphalt, 1 to 2% by weight of a medium temperature additive, 30 to 55% by weight of a solvent, 3 to 15% by weight of a petroleum hydrocarbon resin, and 3 to 15% by weight of styrene-butadiene rubber. It may include weight percent.

In one embodiment, the second waterproofing composition includes 60 to 70% by weight of asphalt, 3 to 15% by weight of petroleum hydrocarbon resin, 3 to 15% by weight of styrene-butadiene rubber, 1 to 10% by weight of heavy paraffin distillate solvent extract, and It may contain 1 to 5% by weight of process oil.

In one embodiment, a reinforcing layer formed of geogrid may be further included on the second waterproofing layer.

In one embodiment, the asphalt pavement layer includes asphalt, styrene-isoprene-styrene (SIS) copolymer, polychloroprene rubber, gilsonite, recycled LDPE pellets, ethylene vinyl acetate (EVA) resin, terpene resin, and aromatic oil. A modified asphalt binder composition comprising: aggregate; and a filler.

According to another aspect, (a) preparing a concrete floor surface; (b) forming a first waterproofing layer by applying a first waterproofing material composition on the prepared concrete floor surface; (c) forming a second waterproofing layer by applying a second waterproofing material composition on the first waterproofing layer; and (d) forming an asphalt pavement layer by laying and compacting the asphalt mixture, wherein the first waterproofing composition includes asphalt, a medium-temperature additive, a solvent, a petroleum hydrocarbon resin, and styrene-butadiene rubber, and the second waterproofing material includes The waterproofing material composition includes asphalt, petroleum hydrocarbon resin, styrene-butadiene rubber, heavy paraffin distillate solvent extract, and process oil, and the asphalt content included in the second waterproofing material composition is the asphalt content included in the first waterproofing material composition. Provides a bridge waterproofing construction method that is 1.2 to 2 times that of

In one embodiment, after step (c), forming a reinforcing layer by applying a geogrid on the second waterproofing layer may be further included.

The bridge waterproofing structure according to one aspect of the present specification has excellent adhesion between the concrete floor and the waterproofing layer and the waterproofing layer and the asphalt pavement layer, and has excellent waterproofing and durability, so it can be applied to various concrete bridge surfaces, including bridges and overpass decks.

In addition, the bridge waterproofing construction method according to another aspect of the present specification can be applied to the construction of a bridge waterproofing structure with excellent adhesion, waterproofing, and durability, and can shorten the work time required for waterproofing construction.

The effect of one aspect of the present specification is not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration described in the detailed description or claims of the present specification.

Below, one aspect of the present specification will be described based on specific examples. However, the description in this specification may be implemented in various different forms, and therefore is not limited to the embodiments described herein.

Throughout the specification, when a part is said to be “connected” to another part, this includes not only cases where it is “directly connected,” but also cases where it is “indirectly connected” with another member in between. . Additionally, when a part is said to “include” a certain component, this does not mean that other components are excluded, but that other components can be added, unless specifically stated to the contrary.

When a range of numerical values is described herein, unless the specific range is stated otherwise, the value has the precision of significant figures given in accordance with the standard rules in chemistry for significant figures. For example, the number 10 includes the range 5.0 to 14.9, and the number 10.0 includes the range 9.50 to 10.49.

Bridge waterproofing structure

A bridge waterproofing structure according to an aspect of the present specification includes: a first waterproofing layer sequentially formed on a concrete floor; second waterproof layer; and an asphalt pavement layer, wherein the first waterproofing layer is formed of a first waterproofing material composition including asphalt, a medium-temperature additive, a solvent, a petroleum hydrocarbon resin, and styrene-butadiene rubber, and the second waterproofing layer is formed of asphalt, a petroleum hydrocarbon resin, It is formed of a second waterproofing composition comprising styrene-butadiene rubber, heavy paraffinic distillate solvent extract, and process oil.

The first waterproofing composition has excellent adhesion to the concrete floor and the second waterproofing layer, exhibits waterproofing properties, and can be diluted at low temperatures by lowering the viscosity when diluting the solvent by using a medium-temperature additive, thereby reducing the risk of fire. , workability can be improved.

The second waterproofing composition has excellent waterproofing performance and adhesion to the asphalt pavement layer, and by including process oil, styrene-butadiene rubber can be easily dissolved in asphalt, showing high tensile strength, cold resistance, and durability.

The asphalt content included in the second waterproofing composition may be 1.2 to 2 times the asphalt content included in the first waterproofing composition. For example, 1.2x, 1.25x, 1.3x, 1.35x, 1.4x, 1.45x, 1.5x, 1.55x, 1.6x, 1.65x, 1.7x, 1.75x, 1.8x, 1.85x, 1.9x, 1.95 It can be double, double, or a range between these two values. If the ratio of the asphalt content included in the second waterproofing material composition to the content of asphalt included in the first waterproofing material composition is less than the above range, waterproofing and adhesion may decrease and the water permeability of the first waterproofing layer and the second waterproofing layer may increase, and accordingly, waterproofing The durability of the structure may be reduced. If the ratio of the asphalt content included in the second waterproofing material composition to the content of asphalt included in the first waterproofing material composition exceeds the above range, the adhesion of the waterproofing layer may decrease, and the concrete floor surface and the asphalt pavement layer may easily separate or fall off from each other.

The first waterproofing composition may include 35 to 50% by weight of asphalt, 1 to 2% by weight of medium temperature additive, 30 to 55% by weight of solvent, 3 to 15% by weight of petroleum hydrocarbon resin, and 3 to 15% by weight of styrene-butadiene rubber. there is.

The first waterproofing composition may include 35 to 50% by weight of asphalt. For example, 35% by weight, 36% by weight, 37% by weight, 38% by weight, 39% by weight, 40% by weight, 41% by weight, 42% by weight, 43% by weight, 44% by weight, 45% by weight, 46% by weight. %, 47% by weight, 48% by weight, 49% by weight, 50% by weight, or a range between any two of these values. If the content of asphalt contained in the first waterproofing composition is less than the above range, the waterproofing performance of the first waterproofing layer may be reduced, and if it exceeds the above range, the adhesion between the first waterproofing layer and the concrete floor or the first waterproofing layer and the second waterproofing layer may be reduced. It can be.

The medium-temperature additives included in the first waterproofing composition include paraffin wax, microcrystalline wax, montan wax, saesol wax, carnauba wax, PE-wax, EVA-wax, PP-wax, hydrogenated castor oil, hydroxystearic acid, Aliphatic petroleum resin, aromatic petroleum resin, petroleum resin in which aliphatics and aromatics coexist, 1,2-hydroxystearic acid, lauric acid amide, bisamide wax, stearic acid amide, oleic acid amide, erucic acid amide, N-oleyl stearic acid. It may be selected from the group consisting of amide, N-stearyl stearic acid amide, N-stearyl ercasic acid amide, di-heptane decyl ketone, pine tar, rosin, rosin salt, and combinations of two or more of these, but is limited thereto. That is not the case.

The first waterproofing composition may include 1 to 2% by weight of a mid-temperature additive. For example, 1% by weight, 1.1% by weight, 1.2% by weight, 1.3% by weight, 1.4% by weight, 1.5% by weight, 1.6% by weight, 1.7% by weight, 1.8% by weight, 1.9% by weight, 2% by weight, or any of these. It can be a range between two values. If the content of the mid-temperature additive contained in the first waterproofing composition is less than the above range, the viscosity increases when diluted with the solvent, and dilution may be performed at a high temperature, thereby increasing the risk of fire and reducing workability, and the first waterproofing layer Adhesion and durability may decrease. If the content of the mid-temperature additive exceeds the above range, the adhesion of the first waterproof layer may decrease.

The solvent included in the first waterproofing composition may be a volatile solvent, but is not limited thereto.

The first waterproofing composition may contain 30 to 55% by weight of a solvent. For example, 30% by weight, 31% by weight, 32% by weight, 33% by weight, 34% by weight, 35% by weight, 36% by weight, 37% by weight, 38% by weight, 39% by weight, 40% by weight, 41% by weight. %, 42% by weight, 43% by weight, 44% by weight, 45% by weight, 46% by weight, 47% by weight, 48% by weight, 49% by weight, 50% by weight, 51% by weight, 52% by weight, 53% by weight, It may be 54% by weight, 55% by weight, or a range between these two values. If the content of the solvent contained in the first waterproofing composition is less than the above range, the viscosity of the first waterproofing composition may increase and workability may be reduced, and if it exceeds the above range, the viscosity may be excessively lowered, resulting in poor smoothness of the concrete floor surface. It may be difficult to form a first waterproofing layer of uniform thickness.

The first waterproofing composition may include 3 to 15% by weight of petroleum hydrocarbon resin. For example, 3% by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 11% by weight, 12% by weight, 13% by weight, 14% by weight. %, 15% by weight, or a range between these two values. If the content of the petroleum hydrocarbon resin contained in the first waterproofing composition is less than the above range, the softening point may be lowered or the adhesion may be reduced, and if it exceeds the above range, the waterproofing performance of the first waterproofing layer may be reduced.

The first waterproofing composition may include 3 to 15% by weight of styrene-butadiene rubber. For example, 3% by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 11% by weight, 12% by weight, 13% by weight, 14% by weight. %, 15% by weight, or a range between these two values. If the content of styrene-butadiene rubber included in the first waterproofing composition is less than the above range, tensile strength and cold resistance may be reduced, and if it is more than the above range, the waterproofing performance of the first waterproof layer may be reduced.

The second waterproofing composition contains 60 to 70% by weight of asphalt, 3 to 15% by weight of petroleum hydrocarbon resin, 3 to 15% by weight of styrene-butadiene rubber, 1 to 10% by weight of heavy paraffin distillate solvent extract, and 1 to 5% by weight of process oil. % may be included.

The asphalt included in the second waterproofing composition may be straight asphalt, but is not limited thereto.

The second waterproofing composition may include 60 to 70% by weight of asphalt. For example, 60% by weight, 61% by weight, 62% by weight, 63% by weight, 64% by weight, 65% by weight, 66% by weight, 67% by weight, 68% by weight, 69% by weight, 70% by weight, or any of these. It can be a range between two values. If the content of asphalt contained in the second waterproofing composition is less than the above range, the waterproofing performance of the second waterproofing layer may be reduced, and if it exceeds the above range, the adhesion between the second waterproofing layer and the asphalt pavement layer or the second waterproofing layer and the first waterproofing layer may be reduced. It can be.

The second waterproofing composition may include 3 to 15% by weight of petroleum hydrocarbon resin. For example, 3% by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 11% by weight, 12% by weight, 13% by weight, 14% by weight. %, 15% by weight, or a range between these two values. If the content of the petroleum hydrocarbon resin contained in the second waterproofing composition is less than the above range, the softening point may be lowered or the adhesion may be reduced, and if it exceeds the above range, the waterproofing performance of the second waterproof layer may be reduced.

The second waterproofing composition may include 3 to 15% by weight of styrene-butadiene rubber. For example, 3% by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 11% by weight, 12% by weight, 13% by weight, 14% by weight. %, 15% by weight, or a range between these two values. If the content of styrene-butadiene rubber included in the second waterproofing composition is less than the above range, tensile strength and cold resistance may be reduced, and if it is more than the above range, the waterproofing performance of the second waterproof layer may be reduced.

The second waterproofing material composition may include 1 to 10% by weight of heavy paraffin distillate solvent extract. For example, 1% by weight, 2% by weight, 3% by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, or between any two of these values. It may be a range. If the content of the heavy paraffin distillate solvent extract contained in the second waterproofing material composition is less than the above range, the viscosity of the second waterproofing material composition may increase and workability may be reduced, and if it exceeds the above range, the waterproofing performance of the second waterproofing layer may be reduced. You can.

The second waterproofing composition may include 1 to 5% by weight of process oil. For example, it may be 1% by weight, 1.5% by weight, 2% by weight, 2.5% by weight, 3% by weight, 3.5% by weight, 4% by weight, 4.5% by weight, 5% by weight, or a range between any two of these values. . If the content of the process oil contained in the second waterproofing composition is less than the above range, the styrene-butadiene rubber does not easily dissolve in asphalt, which may reduce the tensile strength, cold resistance, and durability, and if it exceeds the above range, the waterproofing performance of the second waterproofing layer may be reduced. may deteriorate.

It may further include a reinforcement layer formed of geogrid on the second waterproofing layer.

The geogrid can block asphalt paving equipment from contacting the waterproofing layer when paving the asphalt pavement layer, and at the same time melts at high temperature to integrate the waterproofing layer and the asphalt pavement layer.

In one embodiment, the asphalt pavement layer may be formed of a general asphalt mixture including asphalt, aggregate, and filler.

In another embodiment, the asphalt pavement layer is asphalt, styrene-isoprene-styrene (SIS) copolymer, polychloroprene rubber, Gilsonite, and recycled LDPE (Low Density Polyethylene). A modified asphalt binder composition comprising pellets, ethylene vinyl acetate (EVA) resin, terpene resin, and aromatic oil; aggregate; and a filler.

The modified asphalt mixture has excellent adhesion performance and can exhibit excellent damage prevention performance and durability when applied to the asphalt pavement layer.

The modified asphalt binder composition may be a wet-produced premix type, but is not limited thereto.

The asphalt included in the modified asphalt binder composition may be general asphalt of the PG64-22 grade, but is not limited thereto.

The modified asphalt binder composition includes 1 to 5 parts by weight of SIS copolymer, 0.1 to 5 parts by weight of polychloroprene rubber, 0.4 to 5 parts by weight of Gilsonite, 0.5 to 4.5 parts by weight of recycled LDPE pellets, and EVA resin, based on 100 parts by weight of asphalt. It may contain 0.1 to 1 part by weight, 0.1 to 5 parts by weight of terpene resin, and 0.1 to 0.5 parts by weight of aromatic oil.

The content of the SIS copolymer may be 1 to 5 parts by weight based on 100 parts by weight of the asphalt. For example, it may be 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or a value between these two values. If the SIS copolymer content is less than the above range, the adhesion performance and strength of the modified asphalt mixture may decrease, which may increase the occurrence of cracks in the asphalt pavement layer, and if it exceeds the above range, miscibility within the composition may decrease.

The content of the polychloroprene rubber may be 0.1 to 5 parts by weight based on 100 parts by weight of the asphalt. For example, 0.1 parts by weight, 0.5 parts by weight, 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or any of these. It can be a value between two values. If the polychloroprene rubber content is less than the above range, the resistance and adhesion performance of the modified asphalt mixture may decrease during high temperature deformation.

The content of the gilsonite may be 0.4 to 5 parts by weight based on 100 parts by weight of the asphalt. For example, 0.4 parts by weight, 0.5 parts by weight, 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, 0.9 parts by weight, 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight. parts, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or a value between these two values. If the gilsonite content is less than the above range, the impact resistance, elasticity, crack resistance, and softening point of the modified asphalt mixture may be reduced, and the public performance at low temperatures may be reduced.

The content of the recycled LDPE pellets may be 0.5 to 4.5 parts by weight based on 100 parts by weight of the asphalt. For example, it may be 0.5 parts by weight, 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, or a value between two of these values. If the recycled LDPE pellet content is less than the above range, the utility performance at high and low temperatures may be reduced.

The content of the EVA resin may be 0.1 to 1 part by weight based on 100 parts by weight of the asphalt. For example, 0.1 part by weight, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight, 0.5 part by weight, 0.6 part by weight, 0.7 part by weight, 0.8 part by weight, 0.9 part by weight, 1 part by weight, or between these two values. It can be a value. If the EVA resin content is below the above range, adhesion performance may deteriorate.

The content of the terpene resin may be 0.1 to 5 parts by weight based on 100 parts by weight of the asphalt. For example, 0.1 parts by weight, 0.5 parts by weight, 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or any of these. It can be a value between two values. If the terpene resin content is less than the above range, adhesion performance may deteriorate.

The content of the aromatic oil may be 0.1 to 0.5 parts by weight based on 100 parts by weight of the asphalt. For example, it may be 0.1 part by weight, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight, 0.5 part by weight, or a value between these two values. If the aromatic oil content is less than the above range, processability and dispersibility may be reduced.

The weight ratio of the SIS copolymer and the polychloroprene rubber may be 1:0.1 to 1:1. For example, 1:0.1, 1:0.2, 1:0.3, 1:0.4, 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1 or between any two of these weight ratios. It could be a ratio. If the weight ratio of polychloroprene rubber to SIS copolymer is less than 0.1, resistance and adhesion performance may be reduced during high temperature deformation, and if it is greater than 1, adhesion performance and strength may be reduced and cracking may increase.

The weight ratio of the SIS copolymer and the gilsonite may be 1:0.4 to 1:1. For example, it may be 1:0.4, 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, or a ratio between two of these weight ratios. If the weight ratio of gilsonite to SIS copolymer is less than 0.4, the impact resistance, elasticity, crack resistance, softening point, and co-performance of asphalt at low temperatures may be reduced, and if it is greater than 1, adhesion performance and strength are reduced, increasing the occurrence of cracks. can do.

The weight ratio of the SIS copolymer and the recycled LDPE pellets may be 1:0.5 to 1:0.9. For example, it may be 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, or a ratio between two of these weight ratios. If the weight ratio of the recycled LDPE pellet to the SIS copolymer is less than 0.5, the copolymer performance at high and low temperatures may be reduced, and if it is more than 0.9, the adhesion performance and strength may be reduced and the occurrence of cracks may increase.

The weight ratio of the EVA resin and the terpene resin may be 1:1 to 1:5. For example, it may be 1:1, 1:1.5, 1:2, 1:2.5, 1:3, 1:3.5, 1:4, 1:4.5, 1:5, or a ratio between two of these weight ratios. . If the weight ratio of EVA resin and terpene resin is outside the above range, adhesion performance and softening point may deteriorate.

The vinyl acetate content of the EVA resin may be 15 to 20% by weight. For example, it may be 15% by weight, 16% by weight, 17% by weight, 18% by weight, 19% by weight, 20% by weight, or a value between these two values. If the vinyl acetate content is outside the above range, adhesion performance may deteriorate.

The EVA resin may have a melt index (ASTM D1238) of 2 to 3 g/10 min, a Vicat softening point (ASTM D1525) of 55 to 65 °C, and a melting point of 80 to 90 °C, but is not limited thereto.

The modified asphalt binder composition may further include at least one selected from the group consisting of 1 to 5 parts by weight of aluminum hydroxide and 1 to 5 parts by weight of magnesium hydroxide, based on a total of 100 parts by weight of the EVA resin and the terpene resin. . The aluminum hydroxide and magnesium hydroxide can improve adhesion performance.

The modified asphalt binder composition may further include 1 to 5 parts by weight of petroleum resin based on 100 parts by weight of the asphalt. For example, the petroleum resin content may be 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, or a value between the two values. The petroleum resin can be coated on the surface of asphalt particles to improve the bonding force between the compositions, thereby improving the curing speed and softening point.

The petroleum resin may be coumarone-indene resin, C9 petroleum resin, or a mixture thereof, but is not limited thereto.

The modified asphalt binder composition further includes 0.1 to 5 parts by weight of a softening agent having a lower softening point than the petroleum resin, based on 100 parts by weight of the asphalt, and the petroleum resin may be softened by the softening agent.

The type of softener is not limited as long as it has a lower softening point than the petroleum resin. For example, the softener may be vegetable oil, animal oil, process oil, heavy oil, lubricant oil, or a mixture of two or more of these, but is not limited thereto. For example, if C9 petroleum resin with a softening point of 150 to 160°C is used as the petroleum resin, the coumarone-indene resin can be used as a softener. When the coumarone-indene resin is used as the petroleum resin, vegetable oils such as soybean oil, animal oils, tall oils, C5 petroleum resins, paraffin wax, process oils, heavy oils, lubricants, etc. having a lower softening point can be used.

At least a portion of the asphalt included in the modified asphalt binder composition may be coated with the softened petroleum resin. Workability can be improved by using the softened petroleum resin.

Asphalt formed from a modified asphalt mixture containing the modified asphalt binder composition may be in grades PG76-22 to PG82-34, but is not limited thereto. The performance grade of asphalt is expressed as PGXX-YY, where XX is a high temperature grade and is the highest temperature of asphalt pavement, and -YY is a low temperature grade and is the lowest temperature of asphalt pavement. Therefore, XX represents resistance to plastic deformation at high temperatures, and -YY represents resistance to cracking at low temperatures.

The modified asphalt binder composition may be included in an amount of 1 to 9% by weight based on the total weight of the modified asphalt mixture. For example, 1% by weight, 1.5% by weight, 2% by weight, 2.5% by weight, 3% by weight, 3.5% by weight, 4% by weight, 4.5% by weight, 5% by weight, 5.5% by weight, 6% by weight, 6.5% by weight. %, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, or a value between these two values. If the content of the modified asphalt binder composition is less than the above range, the adhesion performance of the modified asphalt mixture may deteriorate.

The aggregate may be a mixture of coarse aggregate and fine aggregate. The coarse aggregate may be used with a maximum dimension of 13 mm or less, and the fine aggregate may be used with a maximum dimension of 2.5 mm or less, but is not limited thereto.

The aggregate may be included in an amount of 90 to 95% by weight based on the total weight of the modified asphalt mixture.

The filler may be a blast furnace slag-based filler, for example, a filler mixed with blast furnace slag and an additive (catalyst), but is not limited thereto.

The filler may be included in an amount of 1 to 4% by weight based on the total weight of the modified asphalt mixture.

Bridge surface waterproofing construction method

A bridge waterproofing construction method according to another aspect of the present specification includes the steps of (a) preparing the concrete floor surface; (b) forming a first waterproofing layer by applying a first waterproofing material composition on the prepared concrete floor surface; (c) forming a second waterproofing layer by applying a second waterproofing material composition on the first waterproofing layer; and (d) forming an asphalt pavement layer by laying and compacting the asphalt mixture, wherein the first waterproofing composition includes asphalt, a medium-temperature additive, a solvent, a petroleum hydrocarbon resin, and styrene-butadiene rubber, and the second waterproofing material includes The waterproofing composition includes asphalt, petroleum hydrocarbon resin, styrene-butadiene rubber, heavy paraffin distillate solvent extract, and process oil.

The asphalt content included in the second waterproofing composition may be 1.2 to 2 times the asphalt content included in the first waterproofing composition.

The composition and resulting effects of the first waterproofing material composition and the second waterproofing material composition are as described above.

After step (c), the step of forming a reinforcement layer by applying a geogrid on the second waterproof layer may be further included.

The asphalt mixture may be a general asphalt mixture or a modified asphalt mixture, and their composition and resulting effects are as described above.

Step (b) and step (c) may be performed simultaneously or sequentially, and if steps (b) and (c) are performed simultaneously, the work time can be shortened and the work efficiency of bridge waterproofing construction can be greatly improved.

Hereinafter, embodiments of the present specification will be described in more detail. However, the following experimental results describe only representative experimental results among the above examples, and the scope and content of the present specification cannot be interpreted as being reduced or limited by the examples. Each effect of various implementations of the present specification that are not explicitly presented below will be described in detail in the corresponding section.

Preparation Example 1: First waterproofing composition

The first waterproofing material composition was prepared by mixing in the formulation shown in Table 1 below.

Classification (weight%) Manufacturing Example 1-1 Manufacturing Example 1-2 Manufacturing Example 1-3 Comparative Manufacturing Example 1-1 Comparative Manufacturing Example 1-2 Comparative Manufacturing Example 1-3 asphalt 50 43 35 55 33 43 medium temperature additive 1.5 1.5 1.5 1.5 1.5 0 solvent 30.5 37.5 45.5 31.5 45.5 39 Petroleum hydrocarbon resin 9 9 9 6 10 9 Styrene-butadiene rubber 9 9 9 6 10 9

Preparation Example 2: Second waterproofing composition

A second waterproofing material composition was prepared by mixing in the formulation shown in Table 2 below.

Classification (weight%) Manufacturing Example 2-1 Manufacturing Example 2-2 Manufacturing Example 2-3 Comparative Manufacturing Example 2-1 Comparative Manufacturing Example 2-2 Comparative Manufacturing Example 2-3 asphalt 60 65 70 55 73 65 Petroleum hydrocarbon resin 13 12 12 15 10 13 Styrene-butadiene rubber 13 12 12 15 10 13 Heavy paraffin distillate solvent extract 9 7 3 10 5 9 process oil 5 4 3 5 2 0

Preparation Example 3: Modified asphalt mixture

100 parts by weight of general asphalt (PG64-22), 3 parts by weight of styrene-isoprene-styrene (SIS) copolymer, 1.5 parts by weight of polychloroprene rubber, 2 parts by weight of Gilsonite, 2 parts by weight of recycled LDPE pellets, ethylene vinyl acetate (EVA) ) 0.8 parts by weight of resin (POLYBILT 152), 2 parts by weight of terpene resin, 0.3 parts by weight of aromatic oil, 0.04 parts by weight of aluminum hydroxide, 0.04 parts by weight of magnesium hydroxide, 4 parts by weight of C9 petroleum resin and 1 part by weight of coumarone-indene resin as a softener. A wet premix type modified asphalt binder was prepared by mixing the mixture for 1 hour.

A modified asphalt mixture was prepared by mixing the prepared modified asphalt binder, aggregate, and filler at a weight ratio of 6:92:2. The aggregate was used as a mixture of coarse aggregate with a maximum size of 13 mm or less and fine aggregate with a maximum size of 2.5 mm or less, and the filler was a mixture of blast furnace slag and additives (catalysts).

Examples and Comparative Examples

After forming a first waterproofing layer by applying the first waterproofing composition according to Table 3 below to a thickness of 0.2 mm on the upper surface of a concrete package manufactured with dimensions of 300 × 300 × 50 mm, Table 3 below is applied on the first waterproofing layer. The second waterproofing composition according to was applied to a thickness of 1 mm to form a second waterproofing layer. A geogrid was applied on the second waterproof layer to form a reinforcement layer, and then an asphalt mixture according to Table 3 below was laid to a height of 5 cm to produce a specimen in which an asphalt pavement layer was formed.

division first waterproof layer
(First waterproofing composition) second waterproof layer
(Second waterproofing composition) Asphalt pavement layer
(asphalt mixture) Example 1 Manufacturing Example 1-1 Manufacturing Example 2-1 regular asphalt mixture Example 2 Manufacturing Example 1-2 Manufacturing Example 2-2 regular asphalt mixture Example 3 Manufacturing Example 1-3 Manufacturing Example 2-3 regular asphalt mixture Example 4 Manufacturing Example 1-2 Manufacturing Example 2-2 Modified asphalt mixture (Preparation Example 3) Comparative Example 1 Comparative Manufacturing Example 1-1 Comparative Manufacturing Example 2-1 regular asphalt mixture Comparative Example 2 Comparative Manufacturing Example 1-2 Comparative Manufacturing Example 2-2 regular asphalt mixture Comparative Example 3 Manufacturing Example 1-2 Comparative Manufacturing Example 2-3 regular asphalt mixture Comparative Example 4 Comparative Manufacturing Example 1-3 Manufacturing Example 2-2 regular asphalt mixture Comparative Example 5 Manufacturing Example 1-2 - regular asphalt mixture Comparative Example 6 - Manufacturing Example 2-2 regular asphalt mixture

Experiment example

Experimental Example 1: Evaluation of adhesion strength

The specimens prepared in Examples 1 to 4 and Comparative Examples 1 to 6 were cut to a size of 100 × 100 × 50 mm. Adhesive was applied to the upper tensile jig, adhered to the asphalt pavement layer formed on the specimen, and then cured for 24 hours. Using an adhesion strength tester, the maximum tensile load was measured by applying a tensile force in the vertical direction at a load rate of 1 kgf/cm ² /sec.

Experimental Example 2: Waterproofness Evaluation

The water permeability was measured by applying a water pressure of 0.1 N/mm ² for 1 hour using a water permeability test device to the surface of the asphalt pavement layer of the specimens produced in Examples 1 to 4 and Comparative Examples 1 to 6. The test was repeated 5 times, the highest and lowest values were discarded, and the average of the remaining 3 measurements was taken as the permeability. As a control, the water permeability was measured using the same method on the surface of the specimen on which no waterproof layer was formed, and then the water permeability ratio was calculated by substituting it into Equation 1 below.

<Equation 1>

Water permeability ratio = Water permeability of the specimen produced in Examples or Comparative Examples (g) / Water permeability of the control specimen without forming a waterproof layer (g)

Experimental Example 3: Durability evaluation

In order to evaluate the durability of the specimen on which the waterproofness evaluation of Experimental Example 2 was performed, the adhesion strength was evaluated in the same manner as in Experimental Example 1 5 days after the waterproofness evaluation.

The results of Experimental Examples 1 to 3 are shown in Table 4 below.

division Experimental Example 1 Experimental Example 2 Experimental Example 3 Adhesion Strength (MPa) pitching ratio Adhesion Strength (MPa) Example 1 7.25 2 7.11 Example 2 7.52 One 7.39 Example 3 7.08 0 7.01 Example 4 8.89 0 8.80 Comparative Example 1 5.35 12 4.04 Comparative Example 2 2.82 4 2.18 Comparative Example 3 5.27 10 3.97 Comparative Example 4 2.04 6 1.65 Comparative Example 5 4.96 43 0.75 Comparative Example 6 1.54 5 0.99

Referring to Table 4 above, it can be seen that the specimens of Examples 1 to 4 had high adhesion strength, low water permeability ratio, and excellent durability, so that the adhesion strength was maintained even after the waterproofness evaluation.

On the other hand, the specimen of Comparative Example 1, in which the waterproofing layer was formed using the first waterproofing composition with a higher asphalt content and the second waterproofing composition with a lower asphalt content compared to the Example, was confirmed to have lower adhesion strength and waterproofness compared to the Example. In particular, it was confirmed that due to the high water permeability ratio, the adhesion strength was lowered after the waterproofing evaluation and durability was reduced.

The specimen of Comparative Example 2, in which the waterproofing layer was formed using the first waterproofing composition with a low asphalt content compared to the Example and the second waterproofing composition with a high asphalt content, showed lower adhesion strength and waterproofness compared to the Example, especially the adhesion strength. It was confirmed that was greatly reduced.

The specimen of Comparative Example 3 using the second waterproofing composition not containing process oil had a high water permeability ratio, low adhesion strength compared to the example, and low durability, so the adhesion strength decreased after the waterproofing evaluation.

The specimen of Comparative Example 4 using the first waterproofing composition that does not contain a mid-temperature additive showed a very low adhesion strength, and the first waterproofing composition of Comparative Preparation Example 1-3 used to produce the specimen of Comparative Example 4 was It was confirmed that the castle was falling.

It was confirmed that the specimen of Comparative Example 5, in which the second waterproof layer was not formed, had poor waterproofing performance because the water permeability ratio was very high, and after the waterproofing evaluation, it was confirmed that the adhesion strength was significantly reduced and durability was very low.

The specimen of Comparative Example 6 without forming the first waterproof layer showed a very low adhesion strength.

The description of the present specification described above is for illustrative purposes, and a person skilled in the art to which an aspect of the present specification pertains can easily transform it into another specific form without changing the technical idea or essential features described in the present specification. You will be able to understand it. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as unitary may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present specification is indicated by the claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present specification.

Claims (7)

A first waterproofing layer sequentially formed on the concrete floor; second waterproof layer; And it includes an asphalt pavement layer,
The first waterproofing layer includes 35 to 50% by weight of asphalt, 1 to 2% by weight of medium temperature additive, 30 to 55% by weight of solvent, 3 to 15% by weight of petroleum hydrocarbon resin, and 3 to 15% by weight of styrene-butadiene rubber. Formed from a waterproofing composition,
The second waterproof layer contains 60 to 70% by weight of asphalt, 3 to 15% by weight of petroleum hydrocarbon resin, 3 to 15% by weight of styrene-butadiene rubber, 1 to 10% by weight of heavy paraffin distillate solvent extract, and 1 to 5% by weight of process oil. It is formed of a second waterproofing composition containing,
A bridge waterproofing structure wherein the asphalt content contained in the second waterproofing composition is 1.2 to 2 times the asphalt content contained in the first waterproofing composition. delete delete According to paragraph 1,
Bridge waterproofing structure further comprising a reinforcing layer formed of geogrid on the second waterproofing layer. According to paragraph 1,
The asphalt pavement layer is a modified asphalt binder composition containing asphalt, styrene-isoprene-styrene (SIS) copolymer, polychloroprene rubber, gilsonite, recycled LDPE pellets, ethylene vinyl acetate (EVA) resin, terpene resin, and aromatic oil; aggregate; and a bridge waterproofing structure formed from a modified asphalt mixture comprising filler. (a) preparing the concrete floor surface;
(b) forming a first waterproofing layer by applying a first waterproofing material composition on the prepared concrete floor surface;
(c) forming a second waterproofing layer by applying a second waterproofing material composition on the first waterproofing layer; and
(d) comprising the step of laying and compacting the asphalt mixture to form an asphalt pavement layer,
The first waterproofing composition includes 35 to 50% by weight of asphalt, 1 to 2% by weight of a medium temperature additive, 30 to 55% by weight of a solvent, 3 to 15% by weight of a petroleum hydrocarbon resin, and 3 to 15% by weight of styrene-butadiene rubber,
The second waterproofing composition contains 60 to 70% by weight of asphalt, 3 to 15% by weight of petroleum hydrocarbon resin, 3 to 15% by weight of styrene-butadiene rubber, 1 to 10% by weight of heavy paraffin distillate solvent extract, and 1 to 5% by weight of process oil. Contains %,
The bridge surface waterproofing construction method wherein the asphalt content contained in the second waterproofing composition is 1.2 to 2 times the asphalt content contained in the first waterproofing composition. According to clause 6,
After step (c) above,
Bridge waterproofing construction method further comprising forming a reinforcement layer by applying a geogrid on the second waterproofing layer.