KR20160064387A

KR20160064387A - Self swelling compound composition and self-adhesive water-proof material

Info

Publication number: KR20160064387A
Application number: KR1020140167934A
Authority: KR
Inventors: 김영근; 박동협
Original assignee: 한국건설생활환경시험연구원
Priority date: 2014-11-28
Filing date: 2014-11-28
Publication date: 2016-06-08

Abstract

Provided is a self-swelling compound composition characterized by including: 100 parts by weight of asphalt; 10-30 parts by weight of a thermoplastic elastomer; 1-30 parts by weight of an adhesion enhancer; 1-20 parts by weight of an acrylic copolymer; 5-40 parts by weight of a high water-absorbent resin; and 1-5 parts by weight of a plasticizer. A modified conventional sheet waterproofing material is constructed in close contact with a base surface while checking a molten state of a sheet surface by heating a lower surface of the sheet with heat of 1100 to 1300°C by using a torch, so plenty of problems related to flame and an exhaust gas accompanied by heating and melting asphalt occur, attachment with a base surface is not properly performed depending on skill of an operator, a defect may occur due to poor bonding of a connection area while continuous construction is available and a certain thickness of a waterproof layer may be secured, and precision work is difficult when a complex site is constructed. However, the present invention may solve the problems of the conventional modified sheet waterproofing material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to self-expanding compound compositions and self-adhesive water-

More particularly, the present invention relates to a self-expanding compound composition and a leak-barrier type sealant using the self-expanding compound composition and the leakage- The present invention relates to a self-supporting sheet waterproofing material.

Today, various waterproofing materials and waterproofing methods have been developed and applied to major construction structures (civil housing, subway, bridges, public facilities such as water supply and sewerage treatment facilities, public buildings). However, to be. In the case of non-exposed asphalt waterproofing, which is the most commonly used type of defective type of waterproofing method and defects, 45.2% of joints are peeled off> waterproofing layer is broken (28.8%)> swelling (7.7%). The cost of repairing is more than three times the initial construction cost, and it is also difficult to complete repairing, which causes economic loss.

Generally, when the temperature of the sheet waterproofing material is lowered, defects that each material is peeled off due to deterioration of the adhesive force occur, and the waterproofing material adhered to the outside causes the temperature to be further lowered at night, The temperature of the waterproofing material is maintained at a temperature lower than 5 ° C, which causes poor installation and defects due to insufficient low temperature flexibility.

Particularly, the modified asphalt waterproof sheet is liable to cause defects in the waterproof layer in a low temperature environment, and in the case of the synthetic polymer sheet material, when the outside temperature is below 5 캜, problems occur in the curing reaction of the adhesive, An attempt has been made to develop a self-supporting sheet waterproofing material having improved low temperature flexibility and adhesive strength capable of precise construction of the structure.

Behavior of concrete structures can also be caused by fluctuating settlement and groundwater level change caused by temperature change. These repetitive behaviors cause cracks in the concrete structure and also cause no-nodal tensile stress on the waterproof layer applied on the concrete structure, thereby damaging the waterproof layer. Damage to the waterproof layer due to lack of crack response to repetitive structural behavior poses a great risk to the safety of the user as well as the long term durability of the concrete structure.

In the existing waterproofing construction process, the sheet waterproofing method is able to shorten the air because the product is standardized and the thickness is uniform and the finish is simple and does not affect the subsequent process. However, since the sheet material is sensitive to temperature, There are frequent problems that the waterproof performance is deteriorated or leaked due to partial bonding failure and poor stability.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a composition capable of forming a one-shot behavior of a base concrete and a waterproof sheet with low temperature flexibility and excellent adhesion to a winter environment, and a waterproofing sheet using the waterproofing sheet.

In order to solve the above problems, the present invention provides a self-expanding compound comprising 100 parts by weight of asphalt; 10 to 30 parts by weight of a thermoplastic elastomer; 1 to 30 parts by weight of an adhesion promoter; 1 to 20 parts by weight of an acrylic copolymer; 5 to 40 parts by weight of a superabsorbent resin; And 1 to 5 parts by weight of a plasticizer.

In one embodiment of the present invention, the tackifier may be at least one selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, vinyl acetate resin, polyacrylamide, and polyvinyl pyrrolidone. , And the acrylic copolymer is at least one selected from the group consisting of an acrylic ester, an acrylic-styrene copolymer and an acrylic copolymer. Or more.

The present invention provides a leakproof sheet-type waterproofing material comprising the above-described self-expanding compound composition,

Wherein the waterproofing sheet-type waterproofing sheet material is a self-adhesive waterproof sheet comprising a high-density polyethylene film laminated with high-density rubberized asphalt; And a water leakage preventing wrap provided at the lower end of the self-supporting waterproof sheet and including the magnetically expansive compound composition according to any one of claims 1 to 3,

The self-supporting type waterproof sheet has a tensile strength of 3.0 N / mm or more and an elongation of 200% or more.

In one embodiment of the present invention, the leak-barrier type waterproof sheet-protecting material is characterized in that the unit-type waterproof sheets are laminated in plural, and a leak-barrier wrap including the self-expanding compound between the unit- Lt; / RTI >

The self-expanding compound comprises 50 to 80% by weight of asphalt, 5 to 40% by weight of thermoplastic synthetic rubber, 5 to 30% by weight of a tackifier, 1 to 20% by weight of a plasticizer and 1 to 30% by weight of an inorganic filler, , Antioxidants, heat stabilizers, light stabilizers, and the like.

According to the self-expandable composite composition according to the present invention and the waterproofing sheet-like waterproofing material using the same, the conventional improved asphalt sheet waterproofing material can be obtained by heating the lower surface of the sheet with the heat of 1100 to 1300 캜 using a torch, Since it is closely attached to the base surface, it is difficult to adhere to the base surface due to the flame and soot problem accompanied by asphalt heat melting and worker skill, and continuous construction is possible and a certain waterproof layer thickness is secured However, it is possible to solve the problem that there is a risk of defects due to poor connection at the time connection portion, and that it is difficult to perform precise work in complicated site construction.

In addition, since the waterproofing material is not cured, the waterproof layer is lost due to the pressurization due to the concrete pouring, or the cracked portion There is a problem in that the waterproofing material flows down and secondary defects occur. Therefore, unlike conventional waterproofing materials, the self-expanding compound composition utilizing the high absorption polymer and asphalt commercialization technique and the waterproofing sheet- It is a product that can fundamentally solve the leakage problem for the joint with the highest frequency. It is possible to shorten the air, simplify the work safety, and simplify the construction due to the high waterproof performance and simplification of the construction process. Tumble by swollen compound By blocking the leakage due to gel blocking between the particles and improving the low temperature flexibility and high adhesive force of the sheet waterproofing material, it is possible to precisely construct the composite structure in the low temperature environment in winter, and the integrated behavior of the base concrete and the waterproof layer And excellent durability and safety of the concrete structure can be ensured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing the result of water leakage blocking after absorption swelling of a highly water-absorbing polymer particle in a self-expanding compound by encapsulation simulation. FIG.
Fig. 2 is a cross-sectional view showing the moisture behavior of the self-expanding compound against leakage of the sheet joint. Fig.
Fig. 3 is a schematic diagram of a water-swellable waterproofing material using bentonite or superabsorbent polymer schematically illustrating a result of separation of a waterproof layer material after swelling due to swelling.
4 is a cross-sectional view illustrating a self-expanding compound composition and a process of manufacturing a leakproof sheet-type waterproofing sheet using the same.
5 is a cross-sectional view conceptually showing a cross-section of a seat lap joint of a self-expanding integrated leak-barrier type seat waterproofing material according to an embodiment of the present invention.

Hereinafter, a self-expanding compound composition according to an embodiment of the present invention and a waterproofing sheet using waterproofing type waterproofing sheet will be described in detail

In order to solve the above-mentioned problems, the present invention provides a leakproof sheet-type waterproofing material using a self-expanding compound, and the waterproofing material is excellent in low temperature flexibility and excellent adhesion to the base concrete The one-piece forming behavior of the waterproof sheet can be formed. Particularly, it is possible to solve the problems of water swelling phenomenon of a self-expanding compound containing a superabsorbent polymer at a junction between sheets and leakage phenomenon which may occur due to failure in joining and breakage of a joint due to self- have.

Particularly, the waterproofing material of the leak-barrier type self-inflating seat utilizing the self-expanding compound according to the embodiment of the present invention is characterized in that, in the lapped joint of the self-supporting type asphalt sheet waterproofing material, And a leak-barrier lap utilizing a self-expanding compound is laminated on the inside of the lap joint to the lower part of the waterproof layer to suppress leakage of water which may occur due to poor sheet joining and partial adhesion It is possible to fundamentally solve the leakage problem by forming a stable joint.

In addition, the leak-barrier type self-inflating seat waterproofing material utilizing the self-expanding compound according to the embodiment of the present invention can prevent the water swelling of the self-expanding compound at the splice junction leak- swollen) to prevent flow of fluid due to agglomeration phenomenon between the polymer particles, thereby securing the waterproofness of the connection failure at the sheet overlap region and the breakage of the joint, and improving the low temperature flexibility (-20 or more) It enables precise construction of complex structure.

In order to achieve the above effect, the self-expanding compound composition according to an embodiment of the present invention comprises 100 parts by weight of asphalt, 10 to 30 parts by weight of a thermoplastic elastomer, 1 to 30 parts by weight of an adhesion promoter, 1 to 20 parts by weight of an acrylic copolymer 5 to 40 parts by weight of a superabsorbent resin, and 1 to 5 parts by weight of a plasticizer.

The self-expanding asphalt mixture constituting the present invention comprises a thermoplastic elastomer. When the amount of the thermoplastic elastomer is less than 10 parts by weight, the amount of the thermoplastic elastomer is less than 100 parts by weight and less than 10 parts by weight. When the amount of the thermoplastic elastomer is less than 10 parts by weight, the asphalt mixture may have poor elasticity and elongation, Strength, Point ㅇ The elasticity increases but the asphalt content tends to be too low to adhere to the base surface and additionally causes dispersion difficulties in addition of the superabsorbent polymer.

The self-expanding asphalt mixture constituting the present invention includes a plasticizer to increase low temperature brittleness, mixing and processability. The plasticizer is mixed with the asphalt mixture to increase the low temperature brittleness and the mixing ability. The low temperature brittleness enhances the flexibility in the low temperature environment of the asphalt mixture and the increase in the low temperature flexibility enables the precise construction of the complicated structure portion Can be improved.

The content of the plasticizer contained in the composition of the present invention is preferably 1 to 10 parts by weight. If the content of the plasticizer is less than 1 part by weight, the low-temperature embrittlement and the miscibility of the asphalt mixture are not improved. If the amount is more than 10 parts by weight, the adhesion of the composition deteriorates and the material separation occurs at high temperature.

FIG. 1 is a schematic view showing a water leakage blocking structure after absorption swelling for encapsulation of superabsorbent polymer particles in a self-expanding compound according to the present invention. The tackifier contained in the self-expanding compound composition increases adhesion of asphalt mixture, (Polyvinyl alcohol), polyvinyl acetate, vinyl acetate resin, polyacrylamide, polyvinylpyrrolidone (polyvinyl alcohol), and polyvinylpyrrolidone (polyvinyl alcohol) polyvinyl pyrrolidone), and the like.

The content of the tackifier contained in the composition of the present invention is 1 part by weight to 30 parts by weight. When the content is less than 1 part by weight, the effect of addition is insufficient and the cohesive force between the asphalt mixture and the superabsorbent polymer is decreased, The layer is lost by water pressure, and if it exceeds 30 parts by weight, the viscosity and adhesion of the composition are excessively increased, resulting in poor processing of the compound.

2 is a schematic diagram illustrating the water expansion behavior of the self-expanding compound of the present invention. The pressure-sensitive adhesive enhances the cohesive force between the hydrophobic asphalt mixture and the hydrophilic high-absorptive polymer and induces the effect of simulating the coated capsule structure on the surface of the superabsorbent polymer. As shown in FIG. 3, the conventional pressure-sensitive adhesive enhancer uses the conventional bentonite or superabsorbent polymer The water swelling waterproofing material can improve the problem of the waterproof layer being lost due to the rapid swelling of volume and lack of cohesion due to the swelling of the water swellable material and the addition of the tackifier enhances the absorption swelling behavior and swelling speed by encapsulating the surface of the high absorption polymer .

An acrylic ester, an acrylic-styrene copolymer, and an acrylic copolymer, which are included in the magnetically expansive compound composition of the present invention to increase the adhesion of the asphalt mixture and improve the water resistance at the surface of the water-soluble polymer, Acrylic copolymer and the like can be selected and used.

The content of the acrylic copolymer contained in the composition of the present invention is 1 part by weight to 20 parts by weight. When the amount is less than 1 part by weight, the effect of addition is not so significant and the adhesion of the asphalt mixture is not increased and the surface water resistance of the water- , The adhesive force of the lower surface asphalt mixture exceeding 20 parts by weight is increased but the viscosity is increased and the absorption swelling of the high absorption polymer is delayed to deteriorate the performance of blocking the water leakage.

The superabsorbent polymer (SAP) contained in the self-expanding compound composition of the present invention induces a phenomenon of gel blocking which is an adhesion characteristic between polymer particles due to water swelling, At least one selected from the group consisting of sodium polyacrylic acid, polyacrylamide, methacrylic acid, and ethylene oxide may be used. The superabsorbent polymer is typically used as crosslinked sodium acrylate and has a density of 0.6 to 0.8 g / ml, a particle size distribution of 150 to 850 탆, a water holding capacity of 40 g / g or more, a pressure absorption capacity (0.3 psi) of 22 g / The residual amount is preferably 300 ppm or less.

The content of the superabsorbent polymer contained in the composition of the present invention is 5 parts by weight to 40 parts by weight. When the content is less than 5 parts by weight, the self-expanding compound has insufficient absorption and swelling effect, The absorption swelling rate and the absorption amount exceeding are increased but the viscosity is increased and the waterproofing performance is deteriorated due to the material separation of the self-expanding compound after absorption due to the excessive volume swelling of the superabsorbent polymer.

The waterproofing sheet according to an embodiment of the present invention includes a waterproofing sheet including a high-density polyethylene film laminated with high-density rubberized asphalt, a waterproofing sheet having a self- And a leak-barrier lap including a compound composition. In the present specification, the water leakage prevention wrap refers to a sheet provided at the lower end of the waterproof sheet.

In one embodiment of the present invention, the self-supporting type waterproof sheet has a tensile strength of 3.0 N / mm or more and an elongation of 200% or more, and the water leakage preventing wrap of the magnetically expandable compound is spaced apart from the bonding site by 50 to 100 mm And is laminated in a width of 50 to 100 mm.

That is, according to one embodiment of the present invention, high-adhesion rubberized asphalt is laminated on a high-density polyethylene (HDPE) film to a width of 1 to 2 mm and a width of about 100 to 150 cm, and a leak- And 50 to 100 mm in width apart from the joint part 50 to 100 mm. As a result, the integrated structure of the tight jointed joints is formed by the press-contact between the sheets, and the sheet joint failure and partial adhesion occur inside the jointed joints It is possible to suppress water leakage and form a waterproof layer which is stable and watertight.

In addition, leakage-blocking type waterproofing sheet containing self-expanding compound is composed of a high-viscosity, low-temperature flexible asphalt mixture, and the sheet is pressed and adhered to form an integrated structure with the base concrete surface. Repeated behavior of concrete structures can prevent lifting or breaking of waterproofing layer.

In the present invention, the rubberized asphalt constituting the leak-barrier type waterproofing sheet material having the high-density polyethylene (HDPE) film laminated therein comprises 50 to 80% by weight of asphalt, 5 to 40% by weight of thermoplastic synthetic rubber, 1 to 20% by weight of a plasticizer and 1 to 30% by weight of an inorganic filler, and may further include other additives such as an antioxidant, a heat stabilizer, a light stabilizer, and the like.

Since the HDPE according to the present invention uses a film produced by biaxial stretching, it can excellently improve the waterproof layer damage from the outside at the top of the sheet waterproofing material such as tensile strength, tear strength and piercing resistance .

The high-density polyethylene (HDPE) used in the waterproofing sheet-type waterproofing material is preferably 0.1 to 0.3 mm. If the film thickness is less than 0.05 mm, the puncture resistance performance against the push concrete is lowered. If the film thickness is more than 0.3 mm, the adhesion performance of the sheet at the overlapping joint portion tends to be lowered.

In the present invention, the asphalt constituting the leak-barrier type waterproofing sheet containing the self-expanding compound preferably has a softening point of 30 to 100 캜 and an invasion degree of 30 to 175 dmm, and the adhesive strength with the high density polyethylene (HDPE) From the viewpoint of increasing the strength, and it is very preferable that the softening point is 50 to 70 캜 and the penetration is 50 to 90 dmm.

The amount of the asphalt used is preferably 50 to 80% by weight, and if it is less than 50% by weight, the adhesion is poor, and if it exceeds 80% by weight, the strength and adhesive strength are increased but the low temperature embrittlement is increased. Cracks and heat resistance are deteriorated, and there is a problem that the waterproofing material flows down in a high temperature environment in the summer.

In order to prevent leakage of waterproofing material at a high temperature and cracking of a waterproofing material at a low temperature, the leak-barrier type sealant waterproofing material including the self-expanding compound according to the present invention must not only increase the softening point but also increase the elasticity.

Therefore, the leak-barrier type adhesive sheet waterproofing material including the magnetically expandable compound of the present invention includes thermoplastic synthetic rubber in order to increase elasticity and heat resistance. The thermoplastic synthetic rubber acts to increase the elasticity and heat resistance of the waterproofing material by improving the interfacial adhesion by forming a network with the asphalt. The increase in elasticity and heat resistance is caused by the flowing down or deformation at high temperature, It is possible to remarkably improve the occurrence of cracks and breakage.

The content of the thermoplastic synthetic rubber contained in the waterproofing sheet-type waterproofing sheet of the present invention is preferably 5 to 40% by weight. If the content of the thermoplastic synthetic rubber is less than 5 wt%, the elasticity and heat resistance of the sheet waterproofing material are hardly improved. If the content of the thermoplastic synthetic rubber is more than 40 wt%, the adhesive strength is lowered and the viscosity is increased excessively.

According to the present invention, the thermoplastic synthetic rubber is completely melted and dispersed in asphalt by high-speed mixing with a high shear mixer at a high temperature (160 to 180 ° C) to form a homogeneous network structure, As the content increases, elasticity, low-temperature flexibility and mechanical strength increase, but it is more preferable to add 5-15 wt% because it is relatively expensive compared to asphalt.

The tackifier contained in the waterproofing sheet of the present invention comprises a polyisoprene rubber and a butyl rubber to increase the adhesion. The tackifier preferably acts to enhance cracking responsiveness, matrix response (endothelial performance) and sheet-to-sheet bondability of the sheet sealant, and the tackifier content is preferably 5 to 30% by weight. If the content of the adhesion-increasing agent is less than 5% by weight, the water-binding layer breaks due to the repetitive behavior of the backing concrete, and the adhesive strength is improved. But the mechanical properties such as tensile strength and tear strength tends to be lowered.

As the plasticizer contained in the waterproofing material of the waterproofing sheet of the present invention, the processing oil is preferably 1 to 20% by weight. The processing oil is characterized in that the processing performance is improved in the process of manufacturing the waterproofing sheet-like waterproofing material and the low temperature flexibility is maintained in the winter season. If the amount of the plasticizer is less than 1% by weight, the asphalt compound processability is lowered and the low-temperature flexibility is lowered. If the plasticizer content is more than 20% by weight, the adhesive strength is drastically decreased due to the excessive oil addition, have.

FIG. 4 is a schematic view showing a process for producing a leakproof sheet-type waterproofing material containing a self-expanding compound according to the present invention, wherein a surface-active primer is applied to a biaxially stretched high-density polyethylene (HDPE) film, Preparing a self-supporting sheet waterproofing material having a tensile strength of 3.0 N / mm or more and an elongation of 200% or more by laminated rubberized asphalt with a thickness of 1 to 2 mm and a width of about 100 to 150 cm;

Unlike the conventional waterproofing material, the waterproofing material of the leakage-blocking type self-inflating type including the self-expanding compound exhibits excellent low temperature flexibility due to the proper amount of the thermoplastic synthetic rubber and the tackifier, And it has excellent durability and stability of the concrete structure due to the excellent follow-up of cracks in concrete structure due to repetitive structure behavior due to variation of floating settlement and ground water caused by temperature change of concrete structure. .

FIG. 5 is a schematic view showing a lap joint structure of a leak-barrier type self-supporting sheet waterproofing material including a self-expanding compound according to the present invention. In the case of the apparatus, the manufactured high- The waterproof sheet is cooled through the cooling roller by laminating the water leakage blocking laps made of the self-expanding compound by a sheet joining width of 50 to 100 mm and a width of 50 to 100 mm on the lower end of the sheet waterproofing material through the cooling roller, To produce a waterproof sheet.

A self-expanding compound wrap capable of preventing leakage of water inside the sheet-to-sheet overlapping joint is formed in a waterproof layer Thereby preventing leakage of water which may occur due to poor sheet joining and partial adhesion, thereby providing a self-expansible adhesive sheet-like waterproofing material. The waterproofing sheet according to any one of claims 1 to 5, wherein the unit water-repellent waterproof sheet is laminated on the waterproof sheet, A sheet waterproofing material may be provided.

The self-expanding compound according to an embodiment of the present invention has waterproofness in the overlapped portion of the seat waterproofing material by optimizing the swelling behavior and the self-expanding property, and is excellent in water leakage blocking performance. The waterproof layer having a high adhesion asphalt and the self- Type compound 2 middle layer watertight stabilization structure and water leakage after the waterproofing process is completed due to defective joining of the sheet and detachment of the joint part, the water swelling of the superabsorbent polymer in the self- It utilizes the gel blocking inducing effect to block the flow of the fluid coming into the leakage area of the waterproofing material due to the adhesion phenomenon between the impregnants, thereby fundamentally solving the leakage problem of the joint having the highest frequency of leakage in the existing sheet waterproofing method, Shortening of construction time due to simplification of construction process, safety of work It is possible to simplify the construction and the workability.

Hereinafter, the rubberized asphalt waterproof sheet laminated with the polyester nonwoven fabric according to the present invention will be described in more detail by way of examples. However, the present invention is not limited to the following examples.

Damage to the waterproof layer due to insufficient crack response is a serious risk to the safety of the user as well as the durability of the concrete structure.

Accordingly, the present invention can develop a leak-barrier type waterproofing sheet using a self-expanding compound to form a single-layered structure of the base concrete and the waterproof sheet with low temperature flexibility and excellent adhesion to the winter environment . It is an object of the present invention to provide a seat waterproofing material capable of fundamentally solving the problem of water leakage due to failure of joint and breakage of joint due to moisture swelling behavior of a superabsorbent polymer and an asphalt compound at a junction between sheets and leakage leakage due to self- .

Manufacturing example

Production Example 1

The self-expanding compound was prepared according to the blending ratio shown in Table 1 below.

[Table 1]

The self-expanding compound is first melted by heating the asphalt (AP-5) having an invasion degree of about 70 dmm and a softening point of 70 占 폚 at 150 to 180 占 폚, adding a plasticizer and a thermoplastic elastomer and mixing them homogeneously for 2 hours , The temperature of the asphalt mixture was cooled to a temperature of 120 ° C or lower, and an adhesion promoter and acrylic copolymer were added thereto, followed by stirring for 1 hour. Next, a superabsorbent resin was added slowly to carry out high-speed stirring so as to be homogeneously dispersed, and then cooled to prepare a compound.

In the above-mentioned self-expanding compound preparation experiment, the absorption swelling behavior with the addition of the tackifier and the acrylic copolymer in the course of dispersing the superabsorbent polymer was carried out and is shown in Table 2.

[Table 2]

Production Example 2

Highly adhesive asphalt containing asphalt, thermoplastic synthetic rubber, tackifier, plasticizer and inorganic filler was laminated on a high density polyethylene (HDPE) film with a width of 1 mm and a width of 100 cm to prepare a high adhesive adhesive waterproof sheet material.

The physical properties of the high-adhesive adhesive sheet-like waterproofing material laminated with the high-density polyethylene film are shown in Table 3.

[Table 3]

As can be seen from the above test results, the waterproofing material of the high adhesive adhesive sheet of Production Example 2 of the present invention has the tensile strength, elongation, tear strength, flexural resistance and water resistance of the Korean Industrial Standard KS F 4934- , Adhesion performance, water permeability, and endothelial performance were all satisfied.

Example 1

The leak-barrier type waterproofing sheet containing a self-expanding compound was prepared by applying a surface-active primer to a biaxially stretched HDPE film and then laminating the high-adhesion rubberized asphalt to a width of 1 mm and a width of 100 cm, A self-supporting sheet waterproofing material was prepared.

Next, the high-adhesion asphalt-formable sheet waterproofing material thus produced is discharged through a laminate roller, leaving a sheet joining width of 100 mm on the lower end thereof, and a leak-barrier of a self-expanding compound in a width of 50 mm After lapping and lapping, lapping paper was finished and rolled to produce leakproof sheet - type waterproofing material containing self - expandable compound.

In order to evaluate the watertightness of the joint portion of the leakage-blocking sheet waterproofing material of the present invention, a sheet-joined portion of 100 mm was pressed and closely contacted to form a watertight integrated structure, and a self- The concrete and the sheet waterproofing material were attached by pressurization.

Table 4 shows the results of the joint stability performance, adhesion performance, and endothelial performance test of the leak-barrier type self-inflating seat waterproof material including the self-expanding compound.

[Table 4]

As can be seen from the above test results, in the hydrostatic pressure test in the joint of the leak-barrier type waterproofing sheet using the self-expanding compound of Example 1 of the present invention, no leakage occurred and the waterproof layer fracture and crack And no water permeation occurred after 7 days of permeability in long - term waterproofing.

Claims

In a self-expanding compound,
100 parts by weight of asphalt;
10 to 30 parts by weight of a thermoplastic elastomer;
1 to 30 parts by weight of an adhesion promoter;
1 to 20 parts by weight of an acrylic copolymer; 5 to 40 parts by weight of a superabsorbent resin; And
1 to 5 parts by weight of a plasticizer.

The pressure-sensitive adhesive sheet according to claim 1,
Wherein the polymer is at least one selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, vinyl acetate resin, polyacrylamide, and polyvinyl pyrrolidone. Expandable compound composition.

The acrylic copolymer according to claim 1,
An acrylic ester, an acrylic-styrene copolymer, and an acrylic copolymer. 2. The self-expanding compound composition according to claim 1, wherein the acrylic copolymer is an acrylic copolymer.

A leak-barrier type waterproofing sheet material comprising the self-expanding compound composition according to any one of claims 1 to 3.

The waterproofing sheet according to claim 4,
A self-assembled waterproof sheet comprising a high-density polyethylene film laminated with high-density rubberized asphalt; And
And a water leakage preventing wrap provided at the lower end of the self-supporting waterproof sheet and including the self-expanding compound composition according to any one of claims 1 to 3,
Wherein the self-adhesive waterproof sheet has a tensile strength of 3.0 N / mm or more and an elongation of 200% or more.

The waterproofing sheet according to claim 5,
Characterized in that a plurality of the unitized waterproofing waterproof sheets are stacked, and a water leakage blocking wrap including the self-expanding compound is provided between the unitary waterproofing waterproof sheets.

The method of claim 6, wherein the self-expanding compound
50 to 80% by weight of asphalt, 5 to 40% by weight of a thermoplastic synthetic rubber, 5 to 30% by weight of a tackifier, 1 to 20% by weight of a plasticizer and 1 to 30% And an additive of any one or more selected from the group consisting of an antioxidant, a heat stabilizer, and a light stabilizer.