KR20020069607A - A water-proof sheets of pad type and construction method using the same - Google Patents

Abstract

PURPOSE: Provided are a pad type waterproof sheet excellent in elongation and tensile strength, which can stand any cracks of a building and has a heat insulating effect, and a construction method thereof. CONSTITUTION: The pad type waterproof sheet comprises a PEP sheet formed by attaching a first polyester nonwoven fabric and a second polyester nonwoven fabric to the both sides of a heat-molten polyethylene film, a polyethylene crosslinked foam sheet attached to the second polyester nonwoven fabric, a third polyester nonwoven fabric attached to the polyethylene crosslinked foam sheet, wherein one side of the PEP sheet is extended more than 50mm. And the construction method comprises the steps of: impregnating the concrete ground with an epoxy resin as a primer; spreading a coating waterproof agent for adhesion after curing the primer; attaching the pad type waterproof sheets on the coating waterproof agent, wherein the extended PEP sheets overlap the upper surfaces of adjacent pad type waterproof sheets; forming an elastic coating waterproof layer; and forming a top coat on the coating waterproof layer.

Description

Pad-type waterproof sheet and construction method {A WATER-PROOF SHEETS OF PAD TYPE AND CONSTRUCTION METHOD USING THE SAME}

The present invention relates to a pad-type waterproof sheet for external waterproofing of slabs or underground structures on a building roof, and to a construction method thereof, and to withstand any crack in a building by constructing a pad-type waterproof sheet having excellent elongation and tensile strength. The present invention relates to a construction method with improved adhesion and workability to suit this.

Conventionally, external waterproofing works for roof slabs and underground structures have been used alone or in parallel with each other using liquid waterproofing, penetration waterproofing, asphalt waterproofing, sheet waterproofing, and elastic coating waterproofing.

For liquid and penetration waterproofing, apply or penetrate the cement waterproofing agent on the surface of concrete, mortar and other mothers, and apply the mortar mixed with the waterproofing agent to make the mother water-tighten or mix the waterproofing agent with cement and mortar concrete and apply it on the back of the mother body. It is a method to prevent water penetration by making water tight. This method is suitable when the construction site is small in size and short in cross section, but in large structures and spans, if a crack occurs in the structure, the waterproof layer is also destroyed, and only highly skilled workers should rely on it. There is a problem.

Asphalt waterproofing is a method of laminating felt and roofing waterproofing asphalt melted in the melting kiln (melting temperature of about 260 ℃), and the waterproofing layer is excellent, so it has excellent waterproofing effect. There is a disadvantage in that the construction period is long, and it is not preferable because the waterproof effect cannot be expected when the crack of the structure occurs.

Sheet waterproofing is divided into synthetic rubber sheet waterproofing method and synthetic resin sheet waterproofing method according to the type of material used. Adhesive and watertightness of the joint area where the sheet overlaps with the sheet is not stable. Adhesion and water resistance are weak.

After construction, there is a disadvantage that the corner edge portion is broken or voids due to shrinkage of the sheet, which tends to float.

Coating waterproofing can be divided into urethane rubber, acrylic rubber, acrylic resin, and rubberized asphalt, depending on the type of material used. It is a method of finishing liquid materials using rollers or brushes. This method has the advantage of being able to cope with the cracking of the structure with some flexibility and simple working process, while having the disadvantage of not being able to withstand when the degree of cracking is large.

The above methods have the disadvantages as described above, the defects are likely to occur due to the limitations of the physical properties of the waterproofing material itself after construction, and if the crack occurs more than 2 to 3 mm due to the imbalance of the building itself, Beyond the limits of elasticity, the end result is the destruction of the sheet or the waterproofing layer. Therefore, while a structure made of concrete such as reinforced concrete or autoclaved lightweight concrete (ALC) is present, repairs are repeatedly made by defects. 'S work has to remove all the existing waterproof layer, and thus the increase of working time and cost, as well as the disposal of construction wastes that occur is a serious situation. In general, construction waste must be landfilled at a designated place. In the case of such landfill, huge transportation and disposal costs are incurred, and in the case of illegal landfilling, the environmental damage and pollution are increased.

In addition, in the case of repair work on the existing waterproof layer without new construction or dismantling, it is possible to use a method of applying a primer and then attaching a sheet evenly to the base surface. The primer coating layer is also broken together, and moisture penetrates and extends to the entire waterproof layer. Therefore, when the sheet is rolled up, it is easy to see the phenomenon of walking as if it is a sheet of paper with a weakness of comprehensive adhesion. In order to expect the waterproofing effect of the primer layer and the coating waterproof layer, it is resistant to external weather and physical shocks, and is repeatedly generated. There is a need for the development of a waterproof sheet and a waterproof method for minimizing defects.

Therefore, the present invention solves the above problems and laminated with a polyester first nonwoven fabric + polyethylene film + polyester second nonwoven fabric + polyethylene crosslinked foam sheet + polyester third nonwoven fabric having excellent elongation and tensile strength compared to the conventional sheet By using the pad-type waterproof sheet, it is possible to save time and cost during waterproofing work, and it can be used for various waterproofing methods such as exposure and non-exposure. Especially, in case of defect repair, pad-type waterproofing which can contribute to environmental protection by not generating concrete waste. The purpose is to provide a sheet.

In addition, the present invention can be selected in consideration of the conditions and costs of the construction site by using a fully-adhesive, part-adhesive or self-adhesive by appropriately modifying the thickness and material when manufacturing the pad-type waterproof sheet, primer, adhesive layer, pad-type waterproof The purpose is to provide a construction method that can not only maximize the waterproof effect by constructing a composite structure consisting of sheet and coating waterproof layer, but also quickly repair the damage caused by water leakage during repair.

Figure 1a is a cross-sectional perspective view of the pad waterproof sheet according to the present invention,

1b is another embodiment in which rubberized asphalt is added to the pad-type waterproof sheet of the present invention;

Figure 1c is another self-adhesive pad-type waterproof sheet,

Figure 2 is a perspective view showing the characteristics of the PEP sheet forming a waterproof sheet according to the present invention,

3 is a cross-sectional perspective view of the rooftop structure in which the pad-type waterproof sheet of the present invention is constructed.

4 is a cross-sectional view of a rooftop structure in which a pad-type waterproof sheet of the present invention having elasticity against cracking of a structure is constructed.

In order to achieve the above object, the present invention, the heat-melt polyethylene film as a base material, the first and second nonwoven fabrics PPE (PEP) sheet attached to both sides, and the PIP sheet The polyethylene crosslinked foam sheet foamed at a rate of 40 times adhered to the polyester second nonwoven fabric on the lower surface and the polyester third nonwoven fabric attached to the polyethylene crosslinked foam sheet in order to increase the adhesive strength with the coating waterproofing agent were respectively heat-sealed. Laminated, the PEP sheet is characterized in that the pad-shaped waterproof sheet made by extending 50mm or more to one side.

In another aspect, the present invention is characterized in that the pad-type waterproof sheet is used as a self-adhesive pad made by adding an adhesive and a release paper in place of the polyester third non-woven fabric.

In another aspect, the present invention comprises the steps of penetrating the epoxy resin as a primer on the concrete base surface; After the primer is cured, applying an adhesive coating waterproofing agent which is simultaneously bonded and waterproofed; While the pad-type waterproof sheet is bonded onto the adhesive coating waterproofing agent, the joint portion overlaps the PEP sheet extended from one side of the upper surface of the pad-type waterproof sheet while overlapping the upper surface of the adjacent pad-type waterproof sheet. Construction type waterproof sheet; Forming a coating film waterproofing agent on the pad-type waterproof sheet to a thickness of 2 mm or more, and uniformly spraying colored yarn or silica sand and forming an elastic coating waterproof layer to impregnate the pad-type waterproof sheet; Characterized in that it is a fully adhesive construction method using a pad-type waterproof sheet consisting of forming a top coat on the coating film waterproof layer.

In addition, the present invention can also be used as a partial adhesive or self-adhesive using the pad-type waterproof pad.

Hereinafter, the pad type waterproof sheet of the present invention with reference to the accompanying drawings.

Figure 1a is a cross-sectional perspective view of the pad-shaped waterproof sheet of the present invention, the polyester first nonwoven fabric, polyethylene film and polyester second nonwoven fabric (hereinafter referred to as PEP sheet) from the top is a low density of 0.2mm thick melted by heat polyethylene (LDPE) or linear low density polyethylene (LLDPE, linear Low density polyethylene) is a polyester non-woven fabric having the dimensions of a thickness 0.3mm, weight of 100g / m ² on both sides of the order as the thickness of the upper 0.3mm, width 1,050 designed to be impregnated with the The first nonwoven fabric of mm is used for easy impregnation with the film waterproofing agent, and the polyethylene film is used for blocking moisture, and the second nonwoven fabric having a thickness of 0.3mm and a width of 1,050mm is made of a polyethylene crosslinked foam sheet having a thickness of 2mm and Used for thermal fusion of the bar, polyester nonwoven fabric, PEP sheet and polyethylene crosslinked bal The physical properties of the pores are shown in Tables 1, 2 and 3 below.

Physical Properties of Polyester (PET 100%) Nonwovens Weight (g / m ² ) Tensile Strength (kg / 5cm) Elongation (%) 100 30 27

Physical Properties of PEP Sheet (First Nonwoven + Polyethylene + Second Nonwoven) Test Items unit division Result Test Methods Extended performance The tensile strength N / cm Length 237 KSF 4911-97 butterfly 123 KSF 4911-97 Elongation % Length 34 KSF 4911-97 butterfly 36 KSF 4911-97 Temperature dependence Tensile Strength Test Temperature (60 ℃) N / cm Length 209 KSF 4911-97 butterfly 109 KSF 4911-97

Physical Properties of Polyethylene Crosslinked Foam Sheets Test Items unit Result exam Water absorption g / 100cm ² 0.000082 KSM 3862-96 Tensile Strength (Landscape) kgf / cm ² 2.3 KSM 3014-96 (Type A) Thermal Conductivity (Average Temperature: 20 ± 5 ℃) Kcal / mh ℃ 0.036 KSL 9016-96 (plate heat flow metering method)

As can be seen from the above results, the materials used in the manufacture of the waterproof sheet of the present invention can be seen that the value of elongation and tensile strength is suitable as a waterproof material.

After the PEP sheet was prepared, the polyethylene crosslinked foam sheet was heated and fused to a polyester second nonwoven fabric. The crosslinked foam sheet was manufactured at a 40-fold rate by specially foaming polyethylene and adding a crosslinking agent. In terms of mechanical properties, especially the tensile strength is excellent, and even if the primer or adhesive waterproofing layer is partially damaged in case of crack due to the imbalance of the building, it plays a role to protect the coating waterproof layer and the waterproof sheet located on the upper part. Condensation can be prevented and the effects of heat insulation, dustproofing, and sound absorption can be obtained. A 0.3 mm thick polyester nonwoven fabric, which is added by heat fusion to the lower portion of the polyethylene cross-linked foam sheet, is added to facilitate adhesion with an adhesive coating waterproofing agent when constructing a pad-type waterproof sheet, and the total thickness of the pad-type waterproof sheet Becomes 3.1 mm.

In addition, the PEP sheet located on the upper portion of the pad-type waterproof sheet of the present invention is manufactured by protruding 50mm or more from one side of the pad-type waterproof sheet during fabrication in order to ensure perfect adhesion and watertightness between the waterproof sheets.

FIG. 1B is manufactured by adjusting the thickness of the PEP sheet of the pad-type waterproof sheet of FIG. 1A to 0.6 mm and impregnating the lower third nonwoven fabric with rubberized asphalt having a thickness of 2 mm to have a total thickness of 4.5 to 4.6 mm. The adjustment was made by considering that the PEP sheet was impregnated with less than the sum of the actual thicknesses. The pad-type waterproof sheet has a feature that can omit the step of applying a separate adhesive coating waterproofing during construction.

Figure 1c is a total thickness of 2.8mm waterproof sheet without the third polyester non-woven fabric on the lower surface of the pad-shaped waterproof sheet of Figure 1a, instead of bonding adhesive and release paper to the lower portion of the polyethylene cross-linked foam sheet to self-adhesive Pad-type waterproof sheet intended to have.

Hereinafter, a construction method using the pad-type waterproof sheet shown in FIG. 1A will be described.

Pad-type waterproof sheet of the present invention can be used as a fully adhesive of the exposed type, as shown in FIG.

In the fully adhesive primer coating step, first check the base concrete surface of the rooftop slab in which the construction is performed, level the surface, thoroughly clean the foreign substances, and then base concrete in an amount of 0.8 kg / m ² of epoxy resin, a permeable waterproofing agent, as a primer. It is applied evenly to cotton, and it penetrates and dries to ensure concrete waterproofing effect, water resistance and durability.

When the epoxy resin is dried, the coating film waterproofing agent is applied to the coating film waterproofing agent selected from two-component polyurethane, rubberized asphalt, or inorganic elastic coating film to 1.5kg / m ² or more than 1mm thick. It ensures elasticity and adhesive force that will act as a primary buffer to protect the waterproof layer of the upper layer by excellent elongation at the time of crack occurrence.

After the coating of the coating film waterproofing agent is finished, as a construction step of the pad-type waterproofing sheet, the pad in a roll state is unfolded from one side of the surface on which the coating film waterproofing agent is applied, and the bonding operation is performed. And the PEP sheet 50 mm extended from one side of the upper portion of the waterproof sheet overlap the upper portion of the polyester first nonwoven fabric of the adjacent waterproof sheet.

In the present invention, by using a method of overlapping the torch or a separate joint or the sheet itself as in the usual method, instead of connecting the joint parts as described above, forming a 50 mm overlap and bonding them using a two-component coating waterproofing agent. It is possible to prevent the flaw which is easy to occur in and to maximize the watertightness.

When the construction of the waterproof sheet is completed, a step of applying an exposed type elastic coating waterproofing pad to the polyurethane elastic coating or inorganic elastic coating of 2.6kg / m ² to form a thickness of 2mm on the top of the constructed waterproof sheet Impregnated in the polyester first non-woven fabric on the upper part of the waterproof sheet is installed as an exposed type.

If the construction by the above method is not only the waterproof effect is perfect, but also has the property to absorb shocks to improve the gait of people can be utilized as a space to enjoy exercise or rest. In addition, in this step, to coat the coating agent 2.6kg / m ² and the colored yarn or silica sand 2.5kg / m ² of the desired color in order to beautifully appearance in the desired color, to prevent slippage and to minimize the deterioration caused by wear Plain coating method can be used. This serves to form a uniform coating along the curvature even if there is some curvature at the time of floor application.

When the construction of the exposed coating waterproofing agent is completed, the top coat step is a final step, which is 1.3kg / m ^{2 in} the case of waterproofing polyurethane coatings by spray spraying the topcoat of aging without sunlight aging in the sunlight. In the case of parallel coating by using a constant thickness of 1.5kg / m ² , in the case of inorganic elastic coating, the inorganic top coat is applied in the characteristics of the material.

In addition, the waterproof sheet of the present invention can also be used as an exposed partial adhesive.

In the partial adhesive type, when a large amount of water is contained between the existing corroded protective concrete and the waterproofing layer, the degassing pipe is fixed to the protective concrete every 200 m ² so that the moisture can be gasified and degassed. Partially formed according to the position where the pad-type waterproof sheet is located, and attach the waterproof sheet thereon. The process of constructing the waterproof sheet is the same as that of the fully adhesive type, except that the coating waterproofing agent is used by using the amount of polyurethane 3.9kg / m ² and the top coat of 1.3kg / m ² .

The construction by the above method has the advantage of allowing the air to be ventilated by the space secured between the waterproof sheet and the ground concrete and the degassing tube to dry the structure containing moisture and greatly shorten the construction period.

However, in consideration of adhesive strength and durability, it is preferable to construct a completely adhesive type rather than the partial adhesive type for the life of the waterproof construction.

In addition, in the present invention, the application process of the primer and the adhesive waterproofing agent can be omitted by using the self-adhesive pad type waterproof sheet shown in FIG. 1C, and when the construction of the ultra-short period is desired, the self-adhesive sheet can be used.

In addition, the present invention can be particularly constructed in new construction, as shown in Figure 1b, it is possible to use a waterproof sheet impregnated with rubberized asphalt to further maximize the stretching force and flexibility. In this case, apply the epoxy resin primer, which is a permeable waterproofing agent during construction, and after curing, apply the waterproofing sheet. In this case, it is possible to omit the step of applying an adhesive coating waterproofing agent due to the rubberized asphalt attached to the waterproof sheet, thereby significantly reducing the work time, and the coating waterproofing agent on the upper portion of the waterproof sheet can be constructed in an exposed or non-exposed type. There is a characteristic.

When applied to a case in which the surface-type construction is the PU coating film or an inorganic coating film elastic second in an amount of 2.6kg / m ^2, and a non-exposed type construction is coated with a rubberized asphalt coating film waterproofing agent in an amount of 2.6kg / m ² Impregnated to a thickness of 2mm, and the protection layer is protected by pouring 50mm thick protective concrete.

As described above, the pad-type waterproof pad of the present invention can significantly improve the elongation rate and tensile strength compared to the conventional sheet, thereby preventing waterproof defects caused by the occurrence of cracks in the building, ensuring the watertightness of the joints, and According to some changes, construction methods can be widely applied, and construction time can be shortened and workability can be improved.

Pad-type waterproof sheet of the present invention can obtain a thermal insulation effect due to the characteristics of the material and thickness, it is not necessary to construct a separate insulation for both the expansion and repair construction.

In addition, the construction method using the waterproof sheet according to the present invention does not dismantle the existing waterproof layer at the time of defect repair, thereby protecting the environment and reducing costs, and has a triple structure of adhesive coating waterproof layer, pad type waterproof sheet, and elastic film waterproof. By the construction, the waterproof performance is excellent and the shock absorption ability is also excellent, which can improve the feeling of walking.

Claims (4)

It is attached to the PPI sheet, in which a polyester first nonwoven fabric and a second nonwoven fabric are adhered on both sides with a heat-melted polyethylene film as a center, and a polyester second nonwoven fabric on the lower surface of the PPE sheet. The polyethylene crosslinked foam sheet foamed at 40 times the magnification and the polyester third nonwoven fabric attached to the polyethylene crosslinked foam sheet in order to increase the adhesive strength with the coating film waterproofing agent were laminated by the thermal fusion method, respectively, and the PEP sheet was 50mm or more from one side. Pad-type waterproof sheet, characterized in that made by extending. The method of claim 1, Pad-type waterproof sheet, characterized in that for attaching the rubberized asphalt of thickness 2mm below the polyester third nonwoven fabric. It is attached to the PPI sheet, in which a polyester first nonwoven fabric and a second nonwoven fabric are adhered on both sides with a heat-melted polyethylene film as a center, and a polyester second nonwoven fabric on the lower surface of the PPE sheet. Self-adhesive pad type waterproof sheet, characterized in that the polyethylene cross-linked foam sheet foamed at a rate of 40 times by laminating by heat fusion method, wherein the first polyester non-woven fabric is 50mm or more from one side during adhesion. Impregnating an epoxy resin as a primer on the concrete base surface; Applying a coating film waterproofing agent having a thickness of 1 mm, wherein the primer is cured and then bonded and waterproofed at the same time; While the pad-type waterproof sheet is bonded onto the adhesive coating waterproofing agent, the joint portion overlaps the PEP sheet extended from one side of the upper surface of the pad-type waterproof sheet while overlapping the upper surface of the adjacent pad-type waterproof sheet. Construction type waterproof sheet; Forming a coating film waterproofing agent on the pad-type waterproof sheet to a thickness of 2 mm or more, and uniformly spraying colored yarn or silica sand and forming an elastic coating waterproof layer to impregnate the pad-type waterproof sheet; Construction method using a pad-type waterproof sheet, characterized in that consisting of forming a top coat on the coating film waterproof layer.