KR100879933B1 - Constructing method of triple waterproofing material consists of double paint film plus expoused waterproofing sheet in the concrete structure - Google Patents

Abstract

A triple composite waterproof construction method of a concrete structure is provided to maximize the composite waterproofing effect of a coating and a sheet, and to prevent a joint between an asphalt adhesive layer and a rubberized asphalt mastic layer from widening by the behavior of asphalt. A triple composite waterproof construction method of a concrete structure comprises the steps of applying asphalt adhesives on a concrete base to provide primary waterproofing and bonding capacities, preventing a joint between an asphalt adhesive layer and a rubberized asphalt mastic layer from widening, applying rubberized asphalt mastic on liquefied asphalt adhesives to provide secondary waterproofing and moisture-proofing functions, spreading and attaching a roll-shaped exposure type asphalt waterproof sheet on the rubberized asphalt mastic, and overlapping a connection between the exposure type asphalt waterproof sheets and applying rubberized asphalt mastic on the overlapped part to reinforce.

Description

Constructive method of triple waterproofing material consists of double paint film plus expoused waterproofing sheet in the concrete structure}

The present invention relates to a triple composite waterproof construction method of rubber asphalt double coating and sheet for the purpose of waterproofing exposed surfaces such as roofs of buildings, hangars, and the like. A liquid rubber asphalt coating waterproofing material having excellent adhesiveness is first applied, and an asphalt mastic for maintaining a gel state on the rubber asphalt coating waterproofing layer and a colored granule granule layer resistant to ultraviolet rays are formed as an exposed layer, but with tensile performance. And it is related to the triple waterproof composite construction method of the concrete structure by maximizing the composite waterproof effect of the coating film and the sheet by sequentially installing the exposed asphalt waterproof sheet excellent in crack resistance.

In addition, the present invention by applying a mesh non-woven fabric to the joint boundary of the liquid asphalt adhesive to absorb the shrinkage and expansion of the asphalt adhesive layer and rubber asphalt mastic layer due to the concrete behavior to buffer the asphalt adhesive layer and rubber asphalt by the asphalt behavior The present invention relates to a triple composite waterproof construction method of a concrete structure that can reliably prevent the connection seam of the mastic layer from spreading.

In general, the exposed surface of a building such as a rooftop or hangar is the most contacted with external factors. It is waterproof to protect against precipitation, reduces heat load of solar radiation caused by sunlight, and keeps the heat inside. · The proper waterproofing method and waterproofing material should be selected in consideration of the function to insulate and the ability to handle the load applied to the roof surface by snow load and weathering load.

For the renovation of the rooftop waterproofing of the building, after removing the existing waterproof layer protection pressed concrete and waterproof layers, form a new waterproof layer (non-exposed waterproof layer) and press the waterproof layer protection again. Press It can be classified by covering the new waterproof layer (exposure waterproof layer) on top of it without removing the concrete layer. The advantages and disadvantages of these methods are as follows.

First, the non-exposed waterproof layer of the demolition method protects the waterproof layer against cold and snow by preventing an impact on the waterproof layer, and has excellent weather resistance and durability due to the safety of the waterproof layer against ultraviolet rays and acid rain. On the other hand, the construction cost is high and the construction period is long, the existing waterproof layer and the waterproof layer are pressed, the noise and dust are generated during the demolition work of the concrete layer, and the pollution due to the disposal of the remnant waste is generated.

Overlapping exposed waterproof layer has simple advantages such as simple repair period, short repair period, economical cost of maintenance, and insignificant load load on slab due to the formation of new waterproof layer. Receive.

On the other hand, in an exposed area such as a rooftop hangar of a building structure, an impermeable waterproof layer is formed on the surface of the structure in order to prevent moisture from penetrating into the interior. Such a method of forming the waterproof layer is cement liquid waterproof, epoxy waterproof, and polyurethane. Various exposed film waterproofing methods such as waterproofing have been used.

The coating film waterproofing method using polyurethane or acrylic rubber as a main material is to form a film by applying multiple layers of liquid coating waterproofing material, which can form a seamless waterproof layer and can easily construct a narrow construction site. When applying the coating waterproof in several layers, the construction time is long, because each layer requires a curing time of about 24 hours or more, and if a crack occurs in the structure, the coating material also breaks, causing a leak.

In order to make up for the above disadvantages, Patent Registration No. 0278173 proposes a double layer waterproofing coating and sheet of a concrete structure, and Patent Registration No. 0535231 presents a stretch rubber asphalt felt for reinforcing the coating layer and a coating layer and felt laminated waterproofing material using the same. It is widely used in domestic and overseas construction markets.

However, the above proposed methods are non-exposure waterproofing methods in which a waterproofing layer is placed on the waterproofing layer after the waterproofing construction.In the renovation work on the roof of the building, the existing waterproofing layer and the waterproofing layer are removed and a new non-exposed waterproofing layer is again installed. After forming, press the waterproof layer It is the existing waterproof layer demolition method of pouring concrete.

In addition, in the case of the exposure waterproof construction using the above-described waterproofing material, as shown in FIG. 1, the construction is performed in the order of ground surface treatment-primary asphalt primer application-second asphalt mastic application-exposure waterproof sheet laying order. . In the exposed waterproof construction, the asphalt primer coating process carried out before applying the asphalt mastic for the coating film to the base surface has a problem in that the curing time takes about 4 to 6 hours after application, which requires a lot of construction time.

Recently, as a waterproof method performed on a rooftop slab, a composite waterproof method combining an asphalt sheet waterproof and a polyurethane coating waterproof has been proposed and used. This conventional composite waterproof method is presented in Patent Registration No. 0590854. In the composite waterproof method, as shown in FIG. 2, the asphalt sheet 120 is laid on the concrete base surface or the primer layer 110, and the nonwoven fabric layer 130 is formed on the asphalt sheet 120. By installing the polyurethane coating waterproof layer 140 as an exposed surface on the layer 130 is a structure 100 to achieve a bond between the asphalt sheet layer 120 and the coating waterproof layer 140 of a different material.

In the composite waterproof structure 100, the polyurethane layer is excellent in heat resistance and elasticity resistance, so it has a property that does not shrink or expand even in the cold or freezing weather in the summer for a long time in the summer, suitable for waterproofing the exposed surface Is being used.

However, in the composite waterproof structure 100 of the asphalt sheet and polyurethane combination, separation of the waterproof layer may occur due to the lack of adhesion between the concrete base surface and the asphalt waterproof sheet layer 120, and thus correspond to the behavior of the ground concrete. Failure to do so may result in damage to the waterproof effect. In particular, since the polyurethane waterproof layer and the asphalt waterproof sheet layer are composed of heterogeneous materials, the polyurethane layer may be separated from the asphalt waterproof sheet layer after a long time, which may lead to a waterproof defect. Doing.

Therefore, the present invention has been proposed to solve the above problems, the first to apply a liquid asphalt adhesive having a waterproof and adhesive in place of the asphalt primer applied to the base surface, and the gel (Gel) on the asphalt adhesive Maximizing waterproofing effect of coating film and sheet by sequential lamination of rubber asphalt mastic which maintains state and exposed asphalt waterproof sheet having excellent tensile and crack resistance and attaching colored granule particle layer on exposed surface By spreading the mesh non-woven fabric at the joint boundary of the liquid asphalt adhesive, the asphalt adhesive layer and the rubber asphalt mastic layer are absorbed buffered by the concrete behavior to absorb the shrinkage and expansion of the asphalt adhesive layer and the rubber asphalt mastic layer. Reliable protection against spreading of joint seams The purpose is to provide a triple composite waterproof construction method of concrete structures that can be.

In addition, the present invention can be easily applied to waterproofing concrete structures with many protrusions, and the continuous work of laying the exposed asphalt waterproof sheet at the same time as the construction of the liquid asphalt adhesive and the double coating of the rubber asphalt mastic on the gel. The construction process is simplified and excellent workability is possible, and it can be easily installed even in difficult construction areas.In case of defects caused by careless construction, it is easy to find and repair repaired parts and to perform winter construction. Another purpose is to provide a triple composite waterproof construction method.

In addition, the present invention is capable of significantly reducing air by enabling a continuous lamination of the exposed asphalt waterproof sheet with a layer of granulated granules of granules attached to the gel-like rubber asphalt mastic integrated with asphalt adhesive and having a strong layer of granulated granules against external ultraviolet rays. Another object is to provide a triple composite waterproof construction method of a concrete structure that can perform a finishing process without placing a protective mortar or pressed concrete to protect the waterproof layer.

In order to achieve the above object, the present invention, in the quick-drying asphalt compound (Quick Drying Asphalt Compound) 40 to 57wt% synthetic rubber adhesive 15-25wt%, natural mineral fiber 12-16wt%, petroleum resin 5-10wt% and isobutylene Or 3-10 wt% of polyisobutylene-based synthetic resin, and add 0.2 to 0.6 wt% of zinc stearate, 5 to 7 wt% of petroleum solvent, dispersant, antioxidant, and plasticizer at least one selected from the group consisting of co-additives. The first step of applying the asphalt adhesive composition of the liquid phase to the concrete base surface to give the first waterproof and adhesive performance; In the process of applying the liquid asphalt adhesive, the non-woven fabric having a predetermined width is laid on the connection seam to cushion and absorb the contraction and expansion of the asphalt adhesive layer and the rubber asphalt mastic layer due to the concrete behavior to prevent the asphalt adhesive layer from the concrete behavior. A second step of preventing the connection seam between the rubber asphalt mastic layer from spreading; In order to maintain gel viscosity at room temperature, 35 to 50% by weight of rubber asphalt compound, 25 to 40% by weight of plasticizer, 4 to 8% by weight of rubber modifier, 3 to 6% by weight of crosslinking agent, and 2 to 5% of antioxidant %, 15-25 wt% of mineral stabilizer and 1-5 wt% of at least one selected from polyacrylic water-soluble polymer resin and petroleum resin to increase the water resistance of rubber asphalt compound. A third step of applying on the asphalt adhesive of the second waterproof and moisture proof function; Rubber asphalt mixture is coated on both sides of the synthetic resin, a release film is attached to the lower surface, and an exposed asphalt waterproof sheet in the shape of a roll is formed by attaching a colored granule particle layer coated with an ultraviolet ray material (ultraviolet material) on the upper exposed surface. Spreading on the mastic and bonding; And overlapping the connection between the exposed asphalt waterproof sheet to a predetermined width, provides a triple composite waterproof construction method of a concrete structure comprising a fifth step of applying and bonding a rubber asphalt mastic to the overlapping portion.

According to the features of the present invention as described above, has the following effects.

First, by applying the liquid asphalt adhesive directly to the concrete base surface to perform strong adhesion, it can omit the asphalt primer coating process and at the same time exhibit the first waterproof and moisture-proof function, liquid asphalt adhesive and gel rubber asphalt mastic As a result of the continuous construction work of the asphalt waterproof sheet together with the double coating layer is formed, it is possible to significantly reduce the air. In particular, the band-shaped nonwoven fabric buffers the joint joint of the asphalt adhesive layer and the rubber asphalt mastic layer, which acts as the main cause of the defect, to reinforce the joint joint.

Second, it forms a double coating film incorporating the gel asphalt rubber mastic which is formed to have elasticity and flexibility by maintaining the viscosity of the liquid asphalt adhesive and the gel state that is not hardened at all times. Full adhesion can be achieved without any delamination. Accordingly, even if water-resistant defects occur due to inadvertent construction, water leaked under the waterproof layer cannot flow, so defects can be easily found in case of defects and partial repair work is easy.

Third, by applying an exposed asphalt waterproof sheet to which the colored granule particles coated with sunscreen are coated on the rubber asphalt mastic, the construction can be completed without a separate finishing process.

Fourth, since the asphalt adhesive, rubber asphalt mastic, and three types of waterproof asphalt sheet are made of the same asphalt series, it is separated when joining the conventional asphalt sheet and the dissimilar material such as urethane coating waterproofing method. Alternatively, the phenomenon of falling off can be prevented.

Fifth, as the construction of the room temperature method, vertical wall surface construction is possible, there is no risk in handling and transporting the material, and the workability is good by the continuous operation of the room temperature coating of the asphalt adhesive and rubber asphalt mastic and the exposure waterproof sheet.

Hereinafter, preferred embodiments of the present invention will be described in detail.

The triple composite waterproof construction method of the concrete structure according to the present invention maintains the viscosity of the gel state with the asphalt adhesive to perform a strong adhesion to the concrete base surface and maintain the elasticity and flexibility for a long time and at the same time meet the durability of waterproofing The primer coating process can be omitted by waterproofing the primary and secondary coating films with a rubber asphalt mastic, and by coating the exposed asphalt waterproof sheet with a colored granule particle layer on the rubber asphalt mastic in a continuous construction. And it is implemented to maximize the composite waterproof effect.

Figure 3 is a construction cross-sectional view showing an embodiment of the triple composite waterproof method of the concrete structure according to the present invention, Figure 4 is a perspective view showing the configuration of the exposed asphalt waterproof sheet which is the main part of the present invention.

As shown in the drawings, the primer coating process is omitted on the concrete base surface for external waterproofing of the concrete structure, and asphalt adhesive is applied to perform the waterproof and moisture-proof function primarily while performing strong adhesion with the base surface. do.

The asphalt adhesive is described in detail below by using a rubber asphalt coating waterproofing material disclosed in Patent Registration No. 0607154, which is held by the applicant.

The basic condition of asphalt adhesive should be applied to the concrete base surface to improve adhesion to concrete surface and at the same time act as waterproofing film.

In order to meet these conditions, the quality performance criteria of asphalt roof cement according to ASTM D2823 are shown in Table 1 below.

TABLE 1

Test Items unit Standard value Remarks Water absorption % 1.0 or less Nonvolatile matter % 50 or more Mineral stabiligers % 5-20 Asphalt % 40 or more Mineral matter based on original mass of insoluble residue % 80 or more Heat resistance (behavior at 60 ℃) - There should be no flow or bubble. Pliability at 0 ° C - No peeling and cracking

Asphalt adhesive of the present invention for satisfying the above criteria is made of a quick drying asphalt compound (Quick Drying Asphalt Compound) 40 ~ 57wt% as a main raw material, Synthetic Rubber Adhesives (Synthetic Rubber Adhesives) 15 to 25wt%, natural minerals It is prepared by mixing 12 to 16 wt% of Asbestos fibers (Modified Cellulose fibers), 5 to 10 wt% of petroleum resin, and 3 to 10 wt% of any one of isobutylene or poly isobutylene synthetic resin.

In addition, 0.2 to 0.6 wt% of zinc stearate is added as a coadditive to the mixture material mixed above to enhance durability and flexibility, and 5 to 7 wt% of a petroleum solvent to facilitate viscosity control, workability and dispersibility. It comprises, and is prepared by adding 0.2 to 0.4wt of at least one selected from other dispersants, antioxidants, plasticizers.

Here, the asphalt compound is composed of 80% asphalt solids, 20% petroleum solvent (Solvent). In particular, the asphalt compound is made of cutback asphalt or blown asphalt, or a material obtained by mixing these cutback asphalt and blown asphalt.

The synthetic rubber adhesive solution is intended to impart coping with cracks, heat resistance, and adhesiveness, and when it is added below 15wt%, the elongation and adhesive strength decrease, and when it is added above 25wt%, the elongation becomes too large. At the same time the adhesive strength is lowered there is a problem that the cost increases.

The synthetic rubber adhesive (Polybutene) solution is a variety of low by a cationic catalyst polymerization mainly composed of iso butylenes after purification of the C ₄ residue in the pyrolysis process of naphtha of petrochemical and polymerization process Nonmolecular hydrocarbon liquid polymer of molecular weight. It is chemically very stable, has a characteristic of not being easily oxidized by light or heat, and also has its own adhesive force and excellent solubility in aliphatic, aromatic, chlorine-based solvents, etc., and is widely used as a pressure-sensitive adhesive and adhesion agent for rubber adhesives.

The molecular formula of the synthetic rubber adhesive is as follows.

The natural mineral fiber is to be mixed with the synthetic rubber adhesive to give a crack resistance and to increase the adhesive strength, when added to less than 12wt% can not obtain the adhesive strength required by the present invention When added in more than 16wt%, there is a problem that the durability is worse. In the present invention, the natural mineral fiber may be made of asbestos (Asbestos Fibers) or inorganic wheeler (Modified Cellulose Fibers) processed natural stone.

The petroleum resin is to enhance the adhesive strength, increase the tensile strength, heat resistance and coating strength, when added below 5wt%, there is a problem that the tensile strength and coating film strength is lowered, when added to more than 10wt% The strength is so large that there is a problem that the possibility of cracking is very large.

The petroleum resin (Petroleum Resin) is a pale yellow thermoplastic resin obtained by polymerizing unsaturated hydrocarbons such as aliphatic olefins and diolefins generated during pyrolysis of petrochemical naphtha, and compared with conventional aromatic hydrocarbon resins. It has almost no odor, and has excellent color and heat stability and weather resistance, and most of them are easily dissolved in aliphatic and aromatic hydrocarbon solvents. Therefore, they are adhesive agent, paint adhesive for paint, hot melt adhesive and rubber compound adhesive. It is widely used in.

The petroleum resin having the above characteristics is a mixed compound for use for adhesion. When the petroleum resin is added, the petroleum resin is not gelled and is maintained in the liquid phase.

The molecular formula of the petroleum resin is as follows.

Asphalt adhesive prepared in the above composition is applied to a predetermined thickness (about 0.5 ~ 1.0mm in the present embodiment) on the base surface instead of the primer was carried out in the conventional asphalt sheet waterproofing method, the inorganic concrete base with a waterproof film coating function It performs the intermediary function to completely bond cotton and organic asphalt waterproof sheet.

In addition, since the asphalt adhesive can reliably achieve the coating film and the adhesion function only by the primary coating operation of 0.5 to 1.0mm thickness, the coating film and the sheet composite waterproof construction can be easily performed.

Asphalt adhesive having the above characteristics is usually applied to the concrete base surface at a 1 m width interval (corresponding to the width of the waterproof sheet) as shown in FIG. At this time, the non-woven fabric in the form of a band is laid on the joint boundary portion of the applied asphalt adhesive, that is, the width boundary between the width and the width formed in the process of applying the liquid asphalt adhesive in a predetermined width. The mesh nonwoven fabric absorbs the contraction and expansion of the asphalt adhesive layer due to concrete behavior to prevent the connection seam of the asphalt adhesive layer from spreading. That is, the concrete base surface is contracted in the winter season and relaxed in the summer season, thereby causing a phenomenon in which the joint joint portions of the asphalt adhesive layer and the rubber asphalt mastic layer, which are the main resources of the exposure waterproof construction, are opened. Opening phenomenon is prevented while the mesh nonwoven fabric buffers.

The upper part of the asphalt adhesive is excellent in elasticity and flexibility and is maintained in a gel-shaped point island state to cope with the occurrence of microcracks of the concrete structure, and also serves as an adhesive of the exposed asphalt waterproof sheet to be described later as a secondary coating waterproofing material An asphalt mastic layer is installed.

According to the above configuration, it is possible to improve the workability by applying the asphalt adhesive coating step, the mesh nonwoven fabric laying step and the rubber asphalt mastic coating step of the joint boundary portion of the asphalt adhesive continuously.

The gel rubber asphalt mastic in the present invention uses the mastic disclosed in Patent Registration No. 0090604 held by the present applicant.

That is, the rubber asphalt mastic on the gel in the present invention contains the following components:

Rubber asphalt compounds (straight run asphalt, blown asphalt and synthetic rubber compounds)

② Plasticizer (Process Oil, Glycol Oil, Mineral Spirit Oil)

③ Rubber modifier (PIB rubber, polybutene)

④ Crosslinking agent (petroleum resin, water soluble polymer resin)

⑤ Mineral stabilizer, antioxidant, dispersant

The main raw material composition ratio of the rubber asphalt mastic in the gel state is as follows.

Raw material composition ratio (wt%)

Type of raw materials Composition ratio Rubber asphalt compound 35-50 Plasticizer 25-40 Rubber modifier 4-8 Crosslinking agent 3-6 Antioxidant 2-5 Mineral stabilizer 15-25 system 100

week. The rubber asphalt compound is a rubber asphalt compound mixed in an amount of 90 to 96% by weight asphalt, 4 to 10% by weight of synthetic rubber.

In addition, the physical property standards of the rubber asphalt mastic on the gel are as shown in Table 1 below.

Table 1 Rubber Asphalt Mastic

Test Items unit Quality standards Remarks Absorption amount % 1.0 or less ASTM D 2822 (Asphalt Roof Cement) Test Standard Nonvolatile matter % More than 70 Mineral stabilizers % 15-45 Asphalt % 30-60 Mineral matter based on original mass of insoluble residue % 80 or more Heat resistance (Behavior at 60 ℃) - There should be no flow or bubble Pliability at 0 ℃ - No peeling and cracking

Among the components of the rubber asphalt mastic, the asphalt of the rubber asphalt compound is made of any one of the compounds of straight run asphalt, blow asphalt, straight run asphalt and blow asphalt. The synthetic rubber mixed in the synthetic rubber is any one of synthetic rubber such as SBS (Styrene Butadiene Styrene) rubber, SB (Styrene Butadiene) rubber, SEBS (Styrene Ethylene Butadiene Styrene) rubber, SIS (Styrene Isoprene Styrene) rubber, Butyl (Butylene) rubber Done in one.

The plasticizer is added to the rubber asphalt compound to maintain the viscosity of the gel at room temperature to have elasticity and flexibility permanently, paraffinic oil, naphthenic oil in the process oil (Process oil) At least one selected from the group consisting of aromatic oils, or a mixture of glycol oil and mineral sprit oil may be used together with the process oil.

In this case, when the addition ratio of the plasticizer is 25% by weight or less, the rubber asphalt coating waterproofing material is easily cured, and when 40% by weight or more, there is a problem in that the gel state cannot be maintained and flows down.

The rubber modifier is for increasing the viscosity, adhesive strength and durability of the rubber asphalt compound, and increasing the low temperature flexibility, and is prepared by selectively mixing among PIB rubber (Poly Isobutylene Rubber), polybutene (Polybutene) and petroleum resin (Petroleum Resin) do.

When the ratio of the rubber modifier is 4% by weight or less, the adhesion to the concrete base surface is lowered, and when 8% by weight or more, there is a problem of inferior economic efficiency.

The crosslinking agent is intended to stably maintain the physical properties of the rubber asphalt compound. When the addition ratio is 3% by weight or less, there is no crosslinking performance. When the crosslinking agent is 6% by weight or more, the rubber asphalt compound is hardly cured, resulting in a risk of cracking. have.

In an embodiment of the present invention, in addition to the crosslinking agent, at least one material selected from polyacrylate-based water-soluble polymer resin and petroleum resin may be further added to increase water resistance of the rubber asphalt compound. % Is preferred.

Mineral stabilizer together with the antioxidant to increase the thickening effect and flow prevention effect, storage stability and durability of the rubber asphalt compound, at least selected from calcite, fly ash calcium carbonate, bentonite powder, silicon dioxide Done in one. If it is less than 2% by weight of the addition ratio of the antioxidant, there is no antioxidant effect, when 5% by weight or more there is a problem that changes in the physical properties of the rubber asphalt compound to interfere with the crosslinking reaction.

The mineral stabilizer has a problem that the additive effect is reduced when the addition ratio is 15% by weight or less, and when 25% by weight or more, there is a problem that the flexibility of the rubber asphalt compound is reduced.

On the gel-like rubber asphalt coating waterproofing layer having the above-described configuration, an exposed asphalt waterproof sheet having colored granule particles adhered to the exposed surface is installed, and the third waterproof is performed to perform the composite waterproofing of the double coating and the sheet.

Here, the exposed asphalt waterproof sheet also uses a known sheet disclosed in Patent Registration No. 0090604 owned by the applicant.

As shown in Fig. 4, the exposed asphalt waterproof sheet includes a sheet layer in which SBS improved asphalt compound is uniformly coated on both sides of a synthetic resin made of a PP woven fabric or a polyester nonwoven fabric as a center substrate; It is a self-adhesive waterproof sheet made of a release film or release paper which is applied to the upper exposed surface and is installed at the bottom of the colored granule particle layer and the sheet layer coated with an ultraviolet ray material (Ultraviolet material) and is easily peeled from the SBS improved asphalt compound layer. The release film is to prevent the mutually bonding between the wound surface and the corresponding surface of the waterproof sheet when the waterproof sheet is wound in a roll (roll), peel off the release film when the waterproof sheet is laid on the coating layer waterproof layer After the construction will be done.

The exposed asphalt waterproof sheet may be molded by attaching a polyester fiber nonwoven fabric to the lower improved asphalt compound layer. In this case, the fiber nonwoven fabric is impregnated into the rubber asphalt mastic to integrate the coating material and the exposed waterproof sheet, thereby achieving reliable waterproofness.

In particular, the construction of the exposed asphalt waterproof sheet eliminates the need for protection mortar for protection of the waterproof layer, or pouring of pressed concrete.

Referring to the double coating and sheet composite waterproof construction method configured as described above are as follows.

First, the base surface of the structure to be waterproofed should be made as clean and smooth as possible. At this time, the corner area where the floor and the wall meet is treated with a waterproof round mortar with an inclined round surface having a diameter of 50 mm or more. In addition, since the concrete surface should be dried, it is cured until the moisture content of the base surface is less than 10%, and then the foreign substances such as oil, soil, and latencies on the base surface are removed cleanly, and the surface having large irregularities is cleaned. Perform

After the base surface cleaning work is finished, a 20 cm wide reinforcement sheet is attached to a fragile part such as a crack of a concrete structure, a drain part, a corner part of a floor and a wall, a pipe connection part, and the like, where a flaw is likely to occur. Reinforce the waterproof layer.

Next, a liquid asphalt adhesive is applied to the entire surface of the base to be waterproofed by 0.5 to 1.0 mm in thickness to form a primary coating film and an adhesive layer. At this time, using a rubber spatula, a roller, etc. to apply to the entire surface of the base, evenly from the low side to the high side.

And a strip | belt-shaped network nonwoven fabric is spread | covered at the joint boundary part of the asphalt adhesive agent apply | coated as said predetermined width. In this case, the wall surface including the parapet (about 1 m high) on the roof of the building is also subjected to a double coating of asphalt adhesive and rubber asphalt mastic. In this process, the mesh nonwoven construction may be separately reflected by design.

A gel-like rubber asphalt mastic is applied to the upper part of the asphalt adhesive by the width of the waterproof sheet to achieve waterproofing of the first and second coating layers.

Here, the asphalt primer application process is omitted because the asphalt adhesive is completely adhered to the concrete base surface by excellent adhesion.

The construction of the rubber asphalt mastic is applied on the asphalt adhesive as much as the width of the asphalt waterproof sheet, and the exposed asphalt waterproof sheet manufactured in the form of a roll on the rubber asphalt coating waterproofing material in a continuous operation is rolled and the like. By pressing lightly with the exposed asphalt waterproof sheet in close contact with the rubber asphalt mastic to form a double coating and sheet composite waterproof layer.

The connection part (seam) construction between the exposed asphalt waterproof sheet overlaps about 10 cm of the width of the end of the waterproof sheet, and the gel rubber mastic (reinforcement) in a gel state is thinned to a thickness of 1 to 2 mm. After application, overlap and lightly press with a roller to attach the lower sheet and the upper sheet.

The present invention constructed and constructed as described above can be applied to waterproofing, such as the roof of the building structure, the top of the hangar as in the following embodiment.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

1 is a schematic construction cross-sectional view showing a rubber asphalt coating film and a sheet waterproofing method according to the prior art.

Figure 2 is a cross-sectional view showing a composite waterproof method combined with waterproofing asphalt sheet and polyurethane coating according to the prior art.

Figure 3 is a construction cross-sectional view showing a triple composite waterproof method of the double coating and sheet of the concrete structure according to the present invention.

Figure 4 is a perspective view showing the configuration of the exposed waterproof sheet which is the main part of the present invention.

Claims (4)

Quick Drying Asphalt Compound 40 ~ 57wt% synthetic rubber adhesive 15-25wt%, natural mineral fiber 12-16wt%, petroleum resin 5-10wt% and isobutylene or poly isobutylene synthetic resin 3-10wt% As a secondary additive, 0.2 to 0.6 wt% of zinc stearate, 5 to 7 wt% of petroleum solvent, 0.2 to 0.4 wt of at least one selected from a dispersant, an antioxidant, and a plasticizer were added to the concrete-based asphalt adhesive. A first step of applying the surface to give a primary waterproofing and adhesion performance; In the process of applying the liquid asphalt adhesive, the non-woven fabric having a predetermined width is laid on the connection seam to cushion and absorb the contraction and expansion of the asphalt adhesive layer and the rubber asphalt mastic layer due to the concrete behavior to absorb the asphalt adhesive layer and the rubber asphalt sheet. A second step of preventing the connection seam of the stick layer from spreading; In order to maintain gel viscosity at room temperature, 35 to 50% by weight of rubber asphalt compound, 25 to 40% by weight of plasticizer, 4 to 8% by weight of rubber modifier, 3 to 6% by weight of crosslinking agent, and 2 to 5% of antioxidant %, 15-25 wt% of mineral stabilizer and 1-5 wt% of at least one selected from polyacrylic water-soluble polymer resin and petroleum resin to increase the water resistance of rubber asphalt compound. A third step of applying on the asphalt adhesive of the second waterproof and moisture proof function; Rubber asphalt mixture is coated on both sides of the synthetic resin, a release film is attached to the lower surface, and an exposed asphalt waterproof sheet in the shape of a roll is formed by attaching a colored granule particle layer coated with an ultraviolet ray material (ultraviolet material) on the upper exposed surface. Spreading on the mastic and bonding; And A fifth step of overlapping the connection portions between the exposed asphalt waterproof sheet and applying and reinforcing rubber asphalt mastic to the overlapping portions; Triple composite waterproof construction method of a concrete structure comprising a. The method of claim 1, The exposed asphalt waterproof sheet of the fourth step is Concrete structure, characterized in that the SBS improved asphalt compound is uniformly applied on both sides of the synthetic resin consisting of PP or polyester non-woven fabric as a central substrate, and the colored granule particle layer coated with an ultraviolet ray material (Ultraviolet material) is attached to the upper exposed surface. Triple composite waterproof construction method. The method of claim 2, The exposed asphalt waterproof sheet is a triple composite waterproof construction method of a concrete structure, characterized in that consisting of a self-adhesive waterproof sheet is attached to the release film to be easily peeled from the SBS improved asphalt compound at the bottom. The method of claim 2, By attaching a polyester fiber non-woven fabric to the lower portion of the exposed asphalt waterproof sheet to the fiber non-woven fabric is impregnated in a rubber-like rubber asphalt mastic, the waterproofing material and the waterproof sheet is integrated to maintain a solid adhesive force Triple composite waterproof construction method

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