WO2011055871A1

WO2011055871A1 - Rubberized-asphalt-based self-adhesive waterproofing agent, self-adhesive waterproofing sheet including same, and construction method using same

Info

Publication number: WO2011055871A1
Application number: PCT/KR2009/006529
Authority: WO
Inventors: 문영규; 김두병
Original assignee: 주식회사 로드씰; 주식회사 화신
Priority date: 2009-11-04
Filing date: 2009-11-06
Publication date: 2011-05-12
Also published as: KR101005939B1

Abstract

The present invention relates to a rubberized-asphalt-based self-adhesive waterproofing agent, to a self-adhesive waterproofing sheet including same, and to a construction method using same. A rubberized asphalt-based self-adhesive waterproofing sheet according to the present invention fundamentally has a good waterproofing capability and crack compliance for blocking moisture, and good flexibility at low temperatures, and the innate adhesiveness of the waterproofing agent is excellent, such that the sheet can withstand the contraction/expansion caused by changes in weather over the four distinct seasons of the local climate, and can contribute to extending the lifespan of a concrete structure.

Description

[Revision according to Rule 91 15.12.2009] Rubberized asphalt-based self-supporting waterproofing material, self-supporting waterproofing sheet including the same and construction method using the same

The present invention relates to a soft rubberized asphalt-based self-adhesive waterproof material, self-adhesive waterproof sheet comprising the same and a construction method using the same.

In general, when rainwater or groundwater penetrates the concrete structure, the bonding strength of the concrete material is decreased, and the void crack is generated due to the change in the volume of water due to the temperature change, and the crack is enlarged over time, thereby increasing the strength and strength of the concrete structure. It causes a decrease in life.

Therefore, there is a need for a waterproof material having physical properties capable of absorbing the perfect waterproof, load and impact of the concrete structure to suppress the expansion of the crack of the structure.

On the other hand, various materials such as modified asphalt, rubber, etc. are used for perfect waterproofing of such concrete structures, and various physical properties are required according to the use, and physical properties are required to be improved in various fields.

Currently, the waterproofing material mainly used for concrete structures in Korea is divided into three layers of eight layers of waterproof (blown asphalt), sheet waterproofing, chloroprene rubber waterproofing, alkali silicate liquid waterproofing (penetrating waterproofing).

Conventional waterproofing material is solid blown asphalt obtained from refining process of crude oil, and it was used because of the thick waterproof layer due to the layer construction, which was used for excellent waterproofing effect, but the process is complicated, construction cost is high, and room temperature adhesiveness and low temperature flexibility are weak. Therefore, it is vulnerable to cracks in concrete structures, it is difficult to find defects in the event of a defect, and it is a waterproof material that is difficult to use recently due to severe environmental pollution problem caused by odor generated when heating a blown asphalt compound.

The improved asphalt sheet waterproofing material, which is formed in the form of a sheet which improves the problems of conventional asphalt waterproofing, causes a change in the physical properties of the waterproofing material due to the lack of watertightness at the time of joining by heat fusion using the torch at the sheet joint and the direct heating by the torch. There is a disadvantage that a defect occurs due to the lifting phenomenon due to the lack of adhesion to the surface of the structure.

On the other hand, chloroprene rubber-based waterproofing material is a coating film waterproofing material that forms a certain thickness by applying a coating film to the base surface of the structure several times, there is an advantage that can form a continuous coating film waterproof layer without joints, but when the waterproofing material is applied at a high temperature due to poor heat resistance There is a problem that a pinhole occurs or swells up and the waterproof layer is broken, and a uniform waterproof coating film is difficult to form. In addition, after the waterproof layer is formed, damage to the waterproof layer due to external impact is caused by backfilling or the like.

In addition, the penetration type waterproofing material (silicate alkali liquid waterproofing material) is excellent in simplicity of construction and economical efficiency, but there is a problem in that crack tracking due to microcracks of the concrete structure is poor and it is difficult to penetrate the concrete base surface.

Prior Art

Patent Document 1: Japanese Patent Application Laid-Open No. 57-98559

Patent document 2: Japanese Patent Laid-Open No. 57-139143

Patent Document 3: US Patent No. 4,485,201

Patent Document 4: Korean Registered Patent No. 0332632

Patent Document 5: Korean Registered Patent No. 0388810

Patent Document 6: Korean Registered Patent No. 0569694

Patent Document 7: Korea Patent No. 071822

Patent Document 8: Korean Registered Patent No. 0671412

Patent Document 9: Korean Registered Patent No. 0726350

Patent Document 10: Korean Patent Publication No. 2009-0090532

Patent Document 11: Korean Unexamined Patent Publication No. 2009-0056756

For example, Patent Document 1 describes asphalt containing an aromatic and / or naphthenic oil (or mineral oil) and a thermoplastic rubber as a rubber additive for asphalt modification. Mineral oil gives plasticity effect on asphalt and thermoplastic rubber increases softening point and gives toughness, but has a disadvantage of requiring a large amount of rubber in order to improve mechanical strength and original recovery such as compressive strength and tensile strength.

Patent Document 2 discloses a block copolymer (referred to as SBS, SIS, SEBS, etc.) composed of conjugated diene and vinyl aromatic hydrocarbon in bitumen (ie asphalt) material, a stabilizer containing nitrogen and sulfur atoms in a molecule and various other stabilizers, Described are compositions added with a radical polymerization inhibitor.

In addition, Patent Document 3 discloses a blend of powdered rubber and styrene-butadiene block copolymer in asphalt as a heat-resistant antioxidant, a tackifying agent, a plasticizer or a softening agent to add 149 ° C. A method of mixing at between 204 ° C. is described.

The composition discloses high cohesion and adhesion at high temperatures, high flexibility at high and low temperatures, excellent elasticity and can be used as a cracksealer, concrete joint sealer filler and coating sealant for building materials. .

However, the product has a penetration of 60, but the flow (or softening point) of 20 mm at 60 ℃ the roof waterproofing material of the building may be disadvantageous that the flow and plastic deformation occurs due to the poor heat resistance in the summer.

In general, the surface temperature of concrete structures in Korea is different depending on the material and color in summer, but it can rise above 60 ℃. In order to compensate for these disadvantages, inorganic fillers are commonly used, and fillers such as stone and aggregate, calcium carbonate, silica, and talc are widely used, and hardness, penetration, softening point, etc. are increased, but elongation and adhesive properties are deteriorated. Tends to be.

In addition, Patent Literature 4 discloses 6 to 40 parts of (A) styrene-conjugated diene block copolymer, (B) 4 to 40 parts of waste tire rubber powder, (C) 0.01 to 50 parts of waste styrofoam, based on 100 parts by weight of asphalt, An asphalt joint and sealant composition comprising 0 to 100 parts of (D) plasticizer or softener, 0.02 to 5 parts of (E) pressure sensitive adhesive, and 5 to 100 parts of (F) inorganic filler is disclosed.

However, such a composition is not suitable as a waterproofing material for concrete structures because of poor adhesion to the base surface of the structure forming the concrete structure, and low temperature flexibility and low temperature adhesion to accommodate shrinkage / expansion according to the temperature change of the structure. not.

In addition, Patent Literature 5 includes 100 parts by weight of asphalt, 4 to 14 parts by weight of waste tire rubber powder, 4 to 10 parts by weight of styrene-butadiene-styrene copolymer, asphalt sealant used for crack repair of buildings, bridges, roads or tunnels. Although the compositions are described, these compositions provide the required properties (waterproof, adhesive, low temperature flexibility, etc.) as fillers to fill the grooves by filling the cracks with a cutter, but the entire base surface of the structure forming the concrete structure. It cannot satisfy the physical properties such as crack followability, adhesive strength, waterproofness, low temperature adhesiveness, and water-soluble behavior of the structure.

In addition, Patent Document 6, 20 to 70% by weight asphalt; 1 to 30% by weight of a styrenic block copolymer; 70 ~ 80% by weight of hydrogenated lubricating base oil mixture and 20 ~ 30% by weight of additive consisting of Pour Point Lowering Agent and Viscosity Index Enhancer. Pour point is -60 ℃, Viscosity index (25 ℃) is 200cp, Flash point is 0.5-30 weight% of paraffinic viscoelastic synthetic oils which are 250 degreeC or more; Although a heated asphalt coating waterproofing composition comprising 5 to 20% by weight of waste tire rubber powder and 10 to 50% by weight of inorganic filler is described, the composition may be melted by using a portable boiler constituting a double jacket with a heating coating waterproofing material. Portable boilers are essential because they must be used. In addition, if the daily usage is high in large-scale concrete construction waterproofing, etc., the capacity of the mobile boiler should be increased or the efficiency should be increased.

Therefore, when using the heating film waterproofing material, special equipment and professional technicians are required, and the construction cost is expensive, and pollutants such as NOx and SOx in the smoke generated by heating when the heating coating waterproofing material is melted are harmful to the human body. May cause air pollution.

Patent Document 7 and 25% by weight of a butyl rubber compound (butyl rubber compound); 25 wt% of thermoplastic rubber (TPR: Thermo Plastic Rubber) mixed with butadiene synthetic rubber (SBS (Styrene Butadiene Styrene Synthetic Rubber)); 50 wt% of refined liquid asphalt tar was boiled at a temperature of 90-120 ° C to impregnate the nonwoven fabric A sheet is prepared, and a polyethylene film is laminated on the surface of the sheet, a rubber adhesive is coated on the back surface of the sheet, and a surface of the rubber adhesive is impregnated with a release paper to prepare a self-adhesive sheet waterproofing material. 50 mm in width was removed, and the release paper was affixed on the removed overlap part.

Self-adhesive sheet waterproofing material by attaching polyethylene film, color sand, and release paper to a sheet prepared by mixing refined asphalt tar, butyl rubber, thermal plastic rubber and additives to a sheet waterproofing material nonwoven fabric and heating it at 90-120 ° C. as described above. In the process of manufacturing the non-woven fabric has a problem that the laminated asphalt tar and butyl rubber and thermal plastic rubber and additives are not impregnated properly.

In addition, Patent Documents 8 to 11 propose a self-adhesive waterproof sheet using a butyl synthetic rubber which is unvulcanized.

However, the products according to the patent do not provide the measurement values of the adhesive strength, waterproofness, adhesive strength between the sheets of waterproofing material, low temperature flexibility and low temperature adhesiveness of the concrete structure base surface, and the products are waterproof layers in the case of earth and sand jungle from the outside. This easily breaks, or there is a problem that the phenomenon of water leakage of the concrete structure occurs by the lifting phenomenon of the waterproof layer due to the jungle phenomenon.

The present invention solves the problems of the prior art described above, excellent crack tracking, low temperature flexibility, and the method of bonding the joints between the base surface of the concrete structure or the waterproof sheet is not an adhesive method using heat fusion or an adhesive using a torch, etc. It is a non-fused / non-heated adhesive method that is attached by using the adhesive possessed by the waterproofing material itself. The purpose is to provide.

Another object of the present invention is to provide a self-supporting waterproof sheet of a type that can be transported and sold including the waterproof material.

Still another object of the present invention is to provide a waterproof construction method using a rubberized asphalt-based self-adhesive waterproof sheet capable of shortening the air, work stability, and construction cost as the construction process using the waterproof sheet is simple.

Rubberized asphalt-based self-adhesive waterproof material for achieving the above object is 30 to 70% by weight asphalt; 1 to 30% by weight of a styrenic block copolymer; 70 ~ 80% by weight of the mixture of hydrogenated lubricating base oil and 20 ~ 30% by weight of additives composed of pour point lowering agent and viscosity index improver. Synthetic oil has a pour point of -60 ℃, viscosity index of 25cp and 200cp. 0.5-20 wt% of paraffinic viscoelastic synthetic oil having a temperature of 250 ° C. or more; 0.5-20% by weight of petroleum resin; And 5 to 20% by weight of polybutene having physical properties of viscosity index (100 ° C.) 230 cps, flash point 190 ° C., and pour point −10 ° C.

In the rubberized asphalt-based self-adhesive waterproofing material, the coating film waterproofing material further comprises 0.5 to 5% by weight of each additive selected from the group consisting of an antioxidant, a light stabilizer and a heat stabilizer.

Rubberized asphalt-based self-adhesive waterproof sheet for achieving another object of the present invention is characterized in that the rubberized asphalt-based self-adhesive waterproofing material and the release film of the present invention is sequentially laminated on a high density polyethylene (HDPE) film. .

In the rubberized asphalt-based self-adhesive sheet, the high density polyethylene (HDPE) film is characterized in that the thickness of 0.1 ~ 0.15 mm.

The construction method using a self-adhesive waterproof sheet for achieving another object of the present invention comprises a horizontal, vertical or waterproof construction method of the base surface in which they meet, removing the contaminants on the base surface; Coating and curing the asphalt primer on the base surface; And attaching a rubberized asphalt-based self-adhesive waterproof sheet according to the present invention to the base surface.

In the construction method, the method further comprises the step of reinforcing by attaching a rubberized asphalt self-adhesive waterproof sheet according to the present invention the corner portion of the structure where the horizontal plane and the vertical plane meet in the form of "" ". .

In the construction method, the method is injected into the rubber asphalt-based sealant in the corner portion of the structure where the horizontal plane and the vertical plane meets the "b" shape, and then attach the rubberized asphalt self-adhesive waterproof sheet according to the present invention to the corner portion It characterized in that it further comprises the step of reinforcing.

In the construction method, the rubberized asphalt-based self-adhesive waterproof sheet is characterized in that the waterproof sheet itself is laminated by the adhesive force possessed.

When the rubberized asphalt-based self-adhesive waterproof sheet according to the present invention is used as the waterproofing material of the concrete structure, it is basically excellent in water resistance, low temperature flexibility, heat resistance, and self-adhesive power to block moisture, which is caused by four distinct seasons. By changing the temperature it can accommodate the contraction / expansion of the structure to extend the life of the concrete structure. In addition, a simple construction method has the effect of securing the work stability and construction cost reduction due to air shortening.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 and 2 is a schematic view showing a device for producing a rubberized asphalt-based self-adhesive waterproof sheet according to the present invention.

Figure 3 is a perspective view of the rubberized asphalt-based self-adhesive sheet according to the present invention.

4 and 5 are cross-sectional views showing a state in which the rubberized asphalt-based self-adhesive sheet according to the present invention constructed on a horizontal / vertical surface of a concrete structure.

6 is a schematic view showing a state in which the rubberized asphalt-based self-adhesive waterproof sheet according to the present invention constructed in a concrete structure of the "b" shape that the horizontal structure base surface meets the vertical structure.

Figure 7 is a schematic diagram showing a state in which the rubberized asphalt-based self-adhesive sheet according to the present invention constructed on a concrete structure of the "b" shaped to meet the vertical structure on the horizontal structure base surface.

Explanation of symbols for main parts of the drawings

10: Extruder 11: Inlet

12: T die 13: Release film (INLET ROLL)

14: 3-stage laminate roller 15: High density polyethylene (HDPE) film (inlet roll)

16: Cooling roller 17: Winder

18: Release film 19: HDPE film

C: concrete base P: asphalt primer

WP: Rubberized Self-Adhesive Waterproofing Material

AS: Asphalt Sealant

SA: Rubberized self-adhesive waterproof sheet

As described above, the waterproofing material of the concrete structure according to the present invention should be excellent in followability to the microcracks of the structure, to accommodate the behavior of the structure according to the temperature change, the adhesion between the base surface and the waterproofing material joint, waterproof effect It should be excellent and there should be no damage of waterproof layer by external force.

Rubberized self-adhesive waterproofing material according to the present invention for satisfying these properties include asphalt, styrene-based block copolymer, paraffin-based viscoelastic oil, petroleum resin and polybutene, and also antioxidant, heat stabilizer, light stabilizer, etc. And other additives such as these.

According to the present invention, by laminating a high-density polyethylene (HDPE) film on the rubberized asphalt-based self-adhesive waterproof material to provide a waterproof material that can extend the life of the concrete structure by attaching to the base surface with the adhesive strength possessed by the waterproof material itself.

1 and 2 is a schematic view showing a device for producing a rubberized asphalt-based self-adhesive waterproof sheet according to the present invention, Figure 3 is a high-density polyethylene across the soft rubberized asphalt-based self-adhesive waterproof material according to the present invention. It is a perspective view which shows the manufacturing completion state of the rubberized asphalt type self-supporting waterproof sheet which laminated | stacked the (HDPE) film and the release film.

Looking at the process of manufacturing the rubberized asphalt-based self-adhesive waterproof sheet according to the present invention with reference to Figures 1 and 2, first, the soft rubber injected into the inlet 11 in the extruder 10 is equipped with a heating device Asphalt-based self-adhesive waterproof material is melted at about 100 ~ 120 ℃. Then, generally, the release film 13 and the high-density polyethylene (HDPE) are extruded through the T-die 12 of the extruder 10 to a thickness of about 1.5 to 2.0 mm and a width of about 100 to 150 cm. The film 15 is laminated on the top and the bottom with a three-stage laminate roller 14. The waterproof sheet coming out through the three-stage laminate roller 14 cools the waterproof sheet through the cooling roller 16, and then finish rolls the cooled rubberized asphalt-based self-adhesive waterproof sheet by using the winding machine 17. Manufacture a waterproof sheet.

The release film is a film attached to the back surface to protect the adhesive surface of the rubberized asphalt-based self-adhesive waterproof sheet, and when the waterproof sheet is applied, it is peeled off and surface-treated so that it can be attached to the base surface. Or by applying a silicone resin on both sides.

On the other hand, the high-density polyethylene (HDPE) film constituting the rubberized asphalt-based self-adhesive sheet in the present invention is manufactured in the form of a film having physical properties as shown in Table 1 below. The thickness of the high density polyethylene (HDPE) film is preferably 0.1 to 0.15 mm, more preferably about 0.12 mm. If the thickness is less than 0.1 mm, the pitting resistance is inferior, and if it exceeds 0.15 mm, there is a tendency that the adhesion performance with the waterproofing material at the time of overlapping is inferior.

Table 1

Test Items	Exam conditions	unit	Measures	Test Methods
Melt index	190 / 2.6 kg	g / 10 mm	0.15-0.20	ASTM D1238
density	23	g /	0.944-0.947	ASTM D1505
Melting point
	10 / min		135	ASTM D3418
Vicat Softening Point	-		126	ASTM D1525
Tensile Strength (Yield Point)	50 mm / min	kg /	180	ASTM D638
Tensile Strength (break point)	50 mm / min	kg /	350	ASTM D638
Elongation at Break	50 mm	%	More than 500	ASTM D638
Flexural modulus	-	kg /	12,000	ASTM D790
Surface hardness	R-scale	-	55	ASTM D785
Environmental Stress Cracking Resistance	F50	hr	500 or less	ASTM D1693

In addition, the soft rubberized asphalt-based self-adhesive waterproof material may optionally include weathering additives such as antioxidants, heat stabilizers and / or light stabilizers to asphalt, styrenic block copolymers, paraffinic viscoelastic synthetic oils, petroleum resins and polybutenes. It is manufactured by mixing and has excellent waterproofness and low temperature flexibility, and provides excellent waterproofing property that the waterproofing material itself, which is non-fused / non-heated adhesive, can contribute to extending the life of concrete structure.

In the present invention, the asphalt constituting the preferred soft rubberized asphalt-based self-adhesive waterproofing material has a softening point of 30 to 100 ° C. and a penetration of 30 to 175 dmm, which is compatible with ascon and improves adhesion. It is preferable to have a softening point of 50 to 70 ° C and a penetration of 50 to 90 dmm.

The amount of the asphalt used is preferably 30 to 70% by weight, and less than 30% by weight results in poor adhesion due to less content. When it exceeds 70% by weight, strength and adhesive strength are increased, but low temperature brittleness is increased and elasticity disappears. Tends to get worse.

The soft rubberized asphalt-based self-adhesive waterproofing material according to the present invention should not only increase the softening point but also increase the elasticity in order to prevent permanent deformation at high temperatures and cracking at low temperatures.

Therefore, the soft rubberized asphalt-based self-adhesive waterproofing material of the present invention includes a styrene-based block copolymer to increase elasticity and heat resistance. The styrene-based block copolymer forms a network with asphalt to improve interfacial adhesion to increase elasticity and heat resistance of the waterproofing material, and the increase in elasticity and heat resistance may cause deformation and cracking at high temperatures and external shocks. Can be significantly improved.

The content of the styrenic block copolymer included in the waterproofing material of the present invention is preferably 1 to 30% by weight. If the content of the styrenic block copolymer is less than 1% by weight, the elasticity and heat resistance of the waterproofing material are hardly improved. If the content of the styrene-based block copolymer is more than 30% by weight, the adhesiveness of the waterproofing material is reduced and high viscosity is achieved.

According to the present invention, the styrenic block copolymer is completely dispersed in the asphalt matrix by high speed mixing at high temperature (180 ° C.) by a high shear mixer or the like to form a special type of network structure, and the content thereof As this increases, elasticity and mechanical strength increase, but since it is relatively expensive compared to asphalt, it is more preferable to add 1 to 15% by weight. On the other hand, the form of the product is preferred because the powder form has a short dissolution time advantage.

Conventionally, bunker-C oil, dioctylphthalate (DOP), tricresyl phosphate (TCP), paraffinic process oil, aromatic process oil or naphtan process oil have been used as asphalt plasticizers as plasticizers or softeners. .

The bunker-C oil, dioctyl phthalate (DOP), tricresyl phosphate (TCP) is not suitable for applying low temperature and heat resistance when applied to rubberized asphalt self-adhesive waterproof sheet, aromatic and nap Carbon-based process oil is excellent in low temperature, but the viscosity index according to the temperature has a disadvantage of low temperature sensitivity, paraffin-based process oil has a high viscosity index according to the temperature, excellent heat resistance, but low temperature has a disadvantage.

Therefore, in the present invention, paraffin-based viscoelastic synthetic oil is used instead of the conventional plasticizer or softener described above. The paraffinic viscoelastic synthetic oil is a synthetic oil synthesized by adding a pour point lowering agent and a viscosity index improver 20-30% by weight as an additive to a mixture of 70-80% by weight of a hydrogenated lubricated base oil. Viscosity index (25 ℃) has a characteristic of 200cp, flash point of 250 ℃ or more. Here, the mixing ratio of the pour point lowering agent and the viscosity index improver may be mixed in a weight ratio of 1: 9 to 9: 1, and preferably in a weight ratio of 1: 1.

When the paraffin-based viscoelastic synthetic oil is added to the soft rubberized asphalt-based self-adhesive waterproof material constituting the rubberized asphalt self-adhesive waterproof sheet of the present invention constituting the present invention, the room temperature adhesiveness is maintained even in the summer. It has the property of maintaining flexibility at low temperatures.

In addition, the amount of the paraffinic viscoelastic synthetic oil added to the soft rubberized asphalt-based self-adhesive waterproof material constituting the present invention is preferably 0.5 to 20% by weight, and less than 0.5% by weight has almost no additive effect, and 20% by weight. If exceeded, the plasticization is severe and there is a tendency to oxidize the base surface of the concrete structure which is the adhesive surface.

On the other hand, the petroleum resin used in the soft rubberized asphalt self-adhesive waterproof material constituting the rubberized asphalt self-adhesive waterproof sheet of the present invention serves as a tackifying agent, aromatic petroleum resin, coumarone indene At least one selected from petroleum resins such as resins, aliphatic petroleum resins, hydrogenated dicyclopentadiene hydrocarbon resins, and the like, may be used. In particular, it is most preferable to use the hydrogenated dicyclopentadiene type resin which is excellent in adhesive force and low brittleness.

If the content of the petroleum resin is 0.5 to 20% by weight, and the content is less than 0.5% by weight, there is almost no additive effect. If the content of the petroleum resin exceeds 20% by weight, the elasticity of the composition is lowered and low temperature brittleness occurs.

In addition, the soft rubberized asphalt-based self-adhesive waterproofing material of the present invention is 5 to 20% by weight of polybutene having physical properties of viscosity index (100 ℃) 230cp, flash point 190 ℃, pour point -10 ℃ to increase the adhesive strength of the waterproofing material itself It is preferable to add. If the content of polybutene is less than 5% by weight, it is difficult to achieve the desired purpose because the adhesion of the waterproof sheet is insignificant. If the content is more than 20% by weight, the softening point and elasticity of the waterproofing material are reduced, thereby reducing heat resistance.

In addition, in the soft rubberized asphalt self-adhesive waterproof material constituting the rubberized asphalt self-adhesive waterproof sheet of the present invention, antioxidants, light stabilizers (ultraviolet absorbers or HALS-based light stabilizers), thermal stabilizers, etc. in order to prevent degradation of physical properties. Can be further added. Each preferable addition amount of these is 0.5 to 5 weight%. If the content of the other additives is less than 0.5% by weight, it was confirmed that repeated changes in the physical properties of the waterproofing material and cracks on the surface were caused by repeated experiments. Since the unit price is high, the unit price of the waterproofing material is increased, resulting in a less competitive phenomenon.

The soft rubberized asphalt-based self-adhesive waterproofing material of the present invention can be manufactured regardless of the type and mixing order of mixers such as an impeller mixer and a high shear mixer. It is preferable here to use a high shear or high viscosity mixer in order to obtain a more uniformly dispersed composition of the respective components and to mix them in a shorter time.

According to a preferred embodiment of the present invention, the styrene block copolymer and paraffinic viscoelastic synthetic oil are first added to the asphalt and stirred at about 180 ° C. Optionally, various small amounts of additives can be added. As such, the reason why the asphalt, the styrene block copolymer and the paraffinic viscoelastic synthetic oil is mixed first is that the paraffinic viscoelastic synthetic oil gives a plasticizing effect to the asphalt and the styrene block copolymer so that it is more uniformly dispersed. This is because it exhibits low temperature flexibility.

Then, polybutene, petroleum resin, and other weathering additives are added to the mixture, followed by stirring and homogenization at a temperature of 150 ° C. to produce a soft rubberized asphalt-based self-adhesive waterproof material constituting the present invention.

On the other hand, referring to Figures 4 and 5 attached to the rubberized asphalt-based self-adhesive waterproof sheet according to the present invention on the vertical / horizontal surface of the concrete structure, first, (a) the latency of the base surface, dust After removing water, etc., to be free of contaminants, (b) hardening by applying an asphalt primer to obtain a smooth surface of the base surface. Then, (c) attaching the rubberized asphalt self-supporting waterproof sheet of the present invention to the base surface to finish the waterproofing of the concrete structure.

In one preferred embodiment of the present invention, the asphalt primer in step (b) is 0.3 liters per m ² to remove the contaminants on the base surface to be basically waterproof during construction, to keep dry and smooth the surface Apply by degree. Completely dry and cure for 20-40 minutes after application and perform the following work. In addition, in the step (c), the waterproof sheet is preferably manufactured in a thickness of about 1.5 to 2.0 mm and a width of about 100 to 150 cm.

According to the present invention, the rubberized asphalt self-adhesive waterproof sheet in the step (c) increases the adhesive strength in proportion to the size of the waterproof sheet and the base surface, by using the adhesive strength of the flat waterproof sheet itself close contact there is no gap To attach. In addition, the adhesion of the waterproof sheet is constructed from a low portion to a high portion, and all the upper, lower, left and right portions are overlapped by the adhesive force held by the waterproof sheet itself, preferably about 70 mm.

6 is a view showing a state in which the construction of a portion of the concrete structure of the "b" -shaped concrete structure meets the base surface of the vertical structure, looking at its construction method, (a) the latency, dust, moisture on the base surface Removing contaminants such as; (b) applying and curing an asphalt primer to obtain a smooth surface of the base surface; (c) To prevent damage to the waterproof sheet at the corners of the structure where the two surfaces meet, cut the rubber asphalt self-adhesive waterproof sheet about 100 mm in width and reinforce it by attaching the corner part. Then, (d) attach the rubberized asphalt self-supporting waterproof sheet to the base surface.

FIG. 7 is a view illustrating a state in which a horizontal structure base surface and a vertical structure meet in a “b” shaped concrete structure portion, and a construction method thereof includes (a) latency, dust, and moisture on the base surface. Removing contaminants such as; (b) applying and curing an asphalt primer to obtain a smooth surface of the base surface; (c) The corners of the structure where the two faces meet are injected and laid with rubber asphalt sealant to accommodate the contraction / expansion of the corners. Then, (d) cut the rubber asphalt self-adhesive waterproof sheet about 100 mm in width to prevent damage of the waterproof sheet to the corner portion to attach and reinforce the corner portion; (e) Attach the rubberized asphalt self-adhesive waterproof sheet to the base surface.

According to the present invention, the rubberized asphalt sealant in step (c) applies a sealant satisfying ASTM D 6690 Type I.

Hereinafter, the rubberized asphalt-based self-adhesive waterproof sheet according to the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto.

Preparation Example 1

Hydrogenated Lubricant Base Oil (Korea Ultra Chemtech Co., Ltd., S-3300, Cas No. 64741-88-44) 40 wt% and other Hydrogenated Lubricant Base Oil (Korea Ultra Chemtech Co., Ltd., S-9500, Cas No. 64742-65-0) Pour point lowering agent (35% by weight of mixed lubricant base oil) Korea Ultra Chemtech Co., Ltd. Condensate of chlorinated paraffin and phenol, Cas No. N / A and viscosity index improver Korean Ultra Chemtech manufacturer, olefin copolymer, Cas No. N / A) was mixed at a weight ratio of 1: 1 to synthesize 25% by weight to prepare a paraffinic viscoelastic synthetic oil. The pour point of the paraffinic viscoelastic synthetic oil was -60 ° C, the viscosity index (25 ° C) was 200cp, and the flash point was 265 ° C.

Preparation Example 2

5% by weight of paraffin-based viscoelastic synthetic oil obtained in Preparation Example 1, styrene-based block copolymer (Kumho Petrochemical, KTR 401P) in 60% by weight of AP-5 (SK energy), asphalt having a penetration of about 50 dmm. Add weight% and stir at 600 rpm for about 3 hours at 180 ° C, 15% by weight of polybutene (Daelim, PB450), 9% by weight of petroleum resin (Kolon Oil, SU-120), antioxidant (Songwon, SONGNOX) 210B) 1% by weight was added and stirred at 600 rpm for about 1 hour at 150 ° C to homogenize.

Example 1

The soft rubberized asphalt-based self-adhesive waterproofing material obtained in Production Example 2 was melted at about 100 to 120 ° C. with an extruder equipped with a heating device, and then was about 1.5 mm thick and 100 cm wide through the T-die of the extruder. Simultaneously with extrusion, a release film and 0.12 mm thick high density polyethylene (HDPE) film were laminated on top and bottom with a three-stage laminate roller apparatus. The waterproof sheet released through the three-stage laminate roller apparatus is manufactured by cooling the waterproof sheet through a cooling roller, and then finishing rolling the cooled rubberized asphalt-based self-adhesive waterproof sheet using a winding machine.

Comparative Example 1

Self-adhesive rubberized asphalt waterproof sheet (KS F 4934-'08)

Comparative Example 2

According to the prior art, 55% by weight asphalt, 10% by weight viscoelastic synthetic oil, 10% by weight styrenic block copolymer, 10% by weight waste tire rubber powder, 10% by weight inorganic filler, stabilizer and antioxidant 2.5% by weight Coating film waterproofing material was prepared.

Comparative Example 3

According to the prior art, the coating film waterproofing material was prepared to include 64% by weight asphalt, 11% by weight SBS thermoplastic rubber, 8% by weight additives and 8% by weight filler. At this time, the additive is a process oil (process oil), the filler was calcium carbonate.

Comparative Example 4

The same preparation was made in Example 1 except for a high density polyethylene (HDPE) film about 0.09 mm thick.

Comparative Example 5

The same preparation was made in Example 1 except for a high density polyethylene (HDPE) film about 0.16 mm thick.

Comparative Example 6

Except for the coating film waterproofing material prepared in Comparative Example 3 was prepared in the same manner as in Example 1.

Comparative Example 7

Except for the coating film waterproofing material prepared in Comparative Example 4 was prepared in the same manner as in Example 1.

Standard values according to Example 1 and Comparative Example 1 were measured as shown in Table 2, and the results are shown in Table 2 below.

TABLE 2

Standard values according to Example 1 and Comparative Examples 6 to 7 were measured as shown in Table 3, and the results are shown in Table 3 below.

TABLE 3

How to measure:

1) All test items: KS F 4934-'08

Standard values according to Example 1 and Comparative Examples 4 to 5 were measured as shown in Table 4, and the results are shown in Table 4 below.

Table 4

Method of measurement: 1) All test items: KS F 4934-'08

Rubberized asphalt self-adhesive waterproof sheet according to the present invention from Table 2 to Table 4 exhibits excellent physical property values exceeding the standard values of all items of the Korean Industrial Standard KS F 4934-'08, than the waterproofing material obtained in the prior art It can be seen that the results are excellent.

As described above, the rubberized asphalt-based self-adhesive sheet according to the present invention is basically excellent in water resistance, crack tracking, low temperature flexibility to block moisture, and excellent adhesive strength possessed by the waterproofing material itself. It can contribute to the extension of the service life of concrete structures by accommodating shrinkage / expansion caused by climate change.

The present invention solves the problem of water leakage between joints with the highest frequency of leakage by non-fusion / non-heated adhesive method only by rubberized asphalt-based self-adhesive waterproof sheet, without using a separate equipment or a separate material unlike existing products And simple construction method, it has the effect of shortening the air, securing work stability, and reducing construction cost. In addition, it is cheaper than other products because asphalt is used as a main raw material.

Claims

30 to 70% by weight of asphalt,

1-30% by weight of styrenic block copolymer,

70 ~ 80% by weight of the mixture of hydrogenated lubricating base oil and 20 ~ 30% by weight of additives composed of pour point lowering agent and viscosity index improver. Synthetic oil has a pour point of -60 ℃, viscosity index of 25cp and 200cp. 0.5-20 wt% of paraffinic viscoelastic synthetic oil having a temperature of 250 ° C. or higher,

0.5-20% by weight of petroleum resin and

Rubberized asphalt-based self-adhesive waterproofing material characterized in that it comprises 5 to 20% by weight of polybutene having physical properties of the viscosity index (100 ℃) 230cp, flash point 190 ℃, pour point -10 ℃.
The method according to claim 1,

The coating film waterproofing material is rubberized asphalt self-adhesive waterproofing material further comprises 0.5 to 5% by weight of each additive selected from the group consisting of antioxidants, light stabilizers and thermal stabilizers.
Rubberized asphalt-based self-adhesive waterproof sheet, characterized in that it has a structure in which the rubberized asphalt-based self-adhesive waterproofing material according to claim 1 or 2 and the release film are sequentially laminated on a high density polyethylene (HDPE) film.
The method according to claim 3,

Rubberized asphalt-based self-adhesive waterproof sheet, characterized in that the high density polyethylene (HDPE) film thickness is 0.1 ~ 0.15 mm.
In the waterproof construction method of the horizontal, vertical or the base surface where they meet in the concrete structure,

Removing contaminants on the base surface;

Coating and curing the asphalt primer on the base surface; And

Attaching the rubberized asphalt-based self-adhesive waterproof sheet according to claim 3 or 4 on the base surface; Construction method using a self-adhesive waterproof sheet comprising a.
The method according to claim 5,

The method further comprises the step of reinforcing by attaching a rubberized asphalt self-adhesive waterproof sheet according to claim 3 or 4 in the corner portion of the structure where the horizontal surface and the vertical surface meet in the form "a" shaped self-adhesive waterproof sheet Construction method using.
The method according to claim 5,

The method comprises the step of injecting a rubber asphalt sealant in the corner portion of the structure where the horizontal plane and the vertical surface meet in the form of "b", and then reinforcing by attaching a rubberized asphalt self-adhesive waterproof sheet according to claim 3 to the corner portion Construction method using a self-adhesive waterproof sheet, characterized in that it further comprises.
The method according to claim 5,

The rubberized asphalt-based self-adhesive waterproof sheet is a construction method using a self-adhesive waterproof sheet, characterized in that the waterproof sheet itself is laminated with the adhesive strength.