KR20090079027A - Lightweight waterproof sheet and its carring out method - Google Patents

Abstract

A lightweight waterproof sheet and the construction method are provided to construct a waterproof layer directly on the upper part without dismantling the existing rooftop waste concrete, and to have high durability and impact resistance not to have deformation and deterioration by intense heat and cold wave after construction. A lightweight waterproof sheet(10) is manufactured by attaching non-woven fabrics(12) to upper and lower sides of aluminum foil(11) having the thickness of 2~20mum which is a main material, wherein polyester-based non-woven fabrics which are 30~60mm wider than the aluminum foil are attached to the upper part of the aluminum foil to have an extension on one side of the upper part. A construction method of a lightweight waterproof sheet comprises the steps of spreading and fixing a polyethylene film having the width of 500mm or more on the bottom of a rooftop concrete floor structure, installing one air escape pipe per a width of 150~200m^2 of the rooftop concrete floor structure, attaching a waterproof layer protection pad to the corner where a wall and a bottom of the concrete floor structure are extended, attaching lightweight waterproof sheets at an interval of about 5mm in the perpendicular direction to the polyethylene film, attaching a connection tape on a connection of the lightweight waterproof sheets and a connection of the waterproof layer protection pad, and forming an exposure coating waterproof layer and a waterproof coating layer on the upper part of the lightweight waterproof sheet in order.

Description

Lightweight waterproof sheet and its carring out method}

The present invention relates to a lightweight waterproof sheet and a construction method thereof, which is thin and light, has high tensile strength and elongation, and uses aluminum foil, which is not deformed or deformed even in heat waves and cold waves, as a base material, and has a thermal insulation effect thereon. It is a waterproof sheet combined with a blowing agent and a polyester-based nonwoven fabric having impact resistance, which greatly reduces construction period and economic burden and maintains a pleasant building environment.

The waterproof layer is a device that prevents the movement of water by using a continuous membrane material, and the types of materials constituting these membranes are broadly classified into a fixed material (sheet material) and an amorphous material (liquid and powder material). In general, small-scale concrete structures can obtain sufficient waterproofing effect only by coating film waterproofing and liquid waterproofing due to amorphous materials. However, large structures may have cracks on the structure itself and deformation of the waterproofing material caused by solar heat for a long time. You will not get a full waterproof effect alone. In constructing the rooftop waterproofing of a large structure, first of all, consideration should be given to ensuring thermal insulation, and to have an effect of reducing heat / heating loss by adding a thermal insulation function. Secondly, as a waterproof material that can withstand shrinkage expansion effect due to temperature change, when the coating works with average thickness of only 1 ~ 3mm are used for waterproof construction of large structures, the rooftop concrete surface is not constant and its waterproof layer thickness is also It cannot have a constant thickness. Therefore, the deformation is caused by the high temperature in the summer above 50 ℃ and the low temperature in winter below -15 ℃ and corrosion by ultraviolet rays easily occurs. Third, as the air and humidity of the air generated in the concrete surface after construction, waterproof construction should be performed at a concrete surface humidity of 5% or less, but it is difficult to create such an optimal environment throughout the year. Therefore, the moisture contained in the floor concrete during construction is discharged between the coating film and the concrete surface as the temperature rises, and wrinkles or swelling occur, and the waterproofing agent and the concrete do not come into close contact with each other. Fourth, as a convenience of construction work, it should be excellent waterproof construction method in terms of structural, environmental, and economic aspects that do not require line work such as cracking and cracking of broken concrete surface found on old rooftop. Fifth, as the thickness of the waterproof layer, the coating film having a thickness of only 1 to 3 mm causes the phenomenon of crushing and lifting like a confectionary after 1 or 2 years due to deterioration due to ultraviolet rays and high and low temperatures. In addition, in order to have impact resistance, the waterproof layer should be constructed to ensure a constant thickness of 3 mm or more with a material having elasticity and resilience of at least 400% or more. Sixth, as an option for exposed waterproofing, the non-exposed waterproofing method, which requires additional construction of pressed concrete on the roof of the building, is a very dangerous construction that can lead to the collapse of aging buildings that are not well-built. An exposed waterproof method should be selected. Seventh, as a corner part construction method, the corner part is an important part to control 80% of the waterproofing performance and forms the structure of the wall after the construction of the concrete floor structure, so that the construction time is different and shrinkage crack or heterogeneous crack occurs during concrete curing, resulting in a waterproof layer. Will burst together.

In addition to the applicant's pre-registered domestic utility model No. 247250 pad-type insulating waterproof sheet, the pad for the rooftop waterproofing of Patent No. 330989 and the construction method thereof, the pad-type waterproof sheet of Korean Patent No. 462163, Korean Patent No. 512924 Polyethylene lightweight waterproof sheet for repairing roofs and a construction method thereof, and problems such as low durability and high weight of the waterproof pad occurred while constructing the waterproof construction according to the utility model and patent.

The present invention has been devised to solve the above problems of the rooftop waterproof construction of large structures, it is possible to construct a waterproof layer directly on top of the existing rooftop waste concrete without the demolition of the existing rooftop concrete, and there is no deformation and deterioration even in heat waves and cold waves after construction It is intended to provide a waterproof sheet and a construction method thereof having durability and impact resistance.

In the present invention, non-ferrous metal aluminum foil, which is not deformed or deformed even in heat waves and cold waves, is resistant to oxidation and corrosion, and a polyethylene-based crosslinking foaming agent layer and a nonwoven fabric layer having an insulating effect are attached to upper and lower portions thereof to enhance the insulating effect. At the same time to manufacture a lightweight waterproof sheet light weight and easy to work, and to provide a roof waterproof construction method using the lightweight waterproof sheet to solve the above problems.

Lightweight waterproof sheet construction method manufactured by the present invention, unlike the existing waterproof method that requires equipment such as a heating torch by using the waterproof sheet manufactured by the same manufacturing process, the construction is simple, shorten the time period, uniform The effect of waterproof thickness can be obtained. In addition, since the concrete is corroded without being demolished, the damaged parts and uneven areas can be easily supplemented with cement mortar and a waterproof layer can be installed directly on top of them, which shortens the construction period and accordingly reduces the economic cost. have.

In order to achieve the above object, the present invention, using the aluminum foil (aluminum foil) having a thickness of 2 to 20㎛ strong and resistant to oxidation and corrosion, even in heat waves and cold waves, and (a) the upper and lower sides of the aluminum foil Lightweight waterproof sheet, characterized in that the adhesive is applied to, and attached by pressing the non-woven fabric on both upper and lower sides; (b) a light-weight waterproof sheet characterized by applying an adhesive on both sides of the aluminum foil and pressing the polyester-based nonwoven fabric on the upper portion and compressing the polyethylene-based crosslinking foaming layer on the lower portion thereof; (c) a light-weight waterproof sheet, characterized in that the adhesive non-woven fabric coated with an adhesive layer is further attached to the lower portion of the cross-linking foam layer of the (b) lightweight waterproof sheet; (d) a lightweight waterproof sheet that is easily constructed by forming a 30-60 mm nonwoven extension on one side of the upper portion of the lightweight waterproof sheet (a), (b), (c); And a polyethylene nonwoven fabric layer 12 attached to the top of the crosslinked foaming agent layer, an adhesive coating layer formed below, and a release paper 15 coated with a release agent under the adhesive coating layer. Then, to provide a waterproof layer protective pad prepared by cutting to about 50mm or 100mm in width.

The 50mm wide waterproof layer protective pad 16 is attached to the bottom structure 80 and the wall structure connection to the pair at right angles, and the 100mm wide waterproof layer protective pad 16 is attached to the floor structure 80 and the wall structure, respectively. It is constructed in the connecting part so that it can be attached by 50mm.

In addition, the present invention does not require line work such as removing waste concrete using the lightweight waterproof sheet, and provides a lightweight waterproof sheet construction method that can obtain a uniform and excellent waterproof effect.

Hereinafter, with reference to the accompanying drawings an embodiment of a lightweight waterproof sheet and a construction method thereof according to the present invention will be described in detail.

Example  One

1 is a perspective view showing the structure of a lightweight waterproof sheet manufactured by Example 1. FIG.

As shown in FIG. 1, the lightweight waterproof sheet manufactured according to Example 1 was manufactured by attaching a nonwoven fabric 12 to upper and lower surfaces of aluminum foil, using an aluminum foil 11 having a thickness of 2 μm as a center substrate.

The aluminum foil used as the center substrate has no deformation such as wrinkles and warpage in the temperature range of -40 to 100 ° C., has high flexibility not to be broken, and is light as non-ferrous metal and excellent in corrosion resistance. Aluminum foil (aluminum foil) in the present invention includes a soft foil of 2 to 20㎛ thickness made of aluminum with a content of 90% or more and a silver foil having a high tensile strength by coating a functional resin on the surface of the soft foil, the present invention is not coated Soft foil was used.

In addition, the polyester-based nonwoven fabric attached to the upper and lower sides of the aluminum foil is impregnated and condensed with the coating film waterproofing liquid applied on the waterproof sheet to firmly fix the coating film waterproof layer and the waterproof sheet to improve the durability and tensile strength of the waterproof layer.

Example  2

Figure 2 is a perspective view showing the structure of a lightweight waterproof sheet manufactured by Example 2.

As shown in FIG. 2, the lightweight waterproof sheet manufactured according to Example 2 has an aluminum foil 11 having a thickness of 2 μm as a center substrate, and attaches the nonwoven fabric 12 to the upper portion of the aluminum foil, and a polyethylene-based structure at the lower portion thereof. The crosslinked foaming agent layer 13 was prepared by adhering.

The polyethylene-based cross-linking foaming agent attached to the lower part of the aluminum foil is made of a high density capable of shrinking and expanding around 400% at high frequency by chemical crosslinking or electron beam, and protects the waterproof sheet and the waterproof layer constructed by absorbing the impact caused by the crack of the concrete structure. It plays a role. In addition, it is possible to reduce the heating and cooling costs due to the light and excellent thermal insulation effect of the foam structure.

Figure 3 shows a light-weight waterproof sheet manufacturing process of Example 1 or 2 according to the present invention. The aluminum foil 11 is impregnated into the adhesive tank 22, and the adhesive is adhered to both upper and lower sides, and then the polyester nonwoven fabric 12 transferred by the guide roller 20 is attached to the upper portion of the aluminum foil, and the lower portion of the aluminum foil is attached. A lightweight waterproof sheet was manufactured by attaching the polyester nonwoven fabric 12 (Example 1) or polyethylene crosslinked foaming agent layer 13 (Example 2) transferred by the guide roller 20 to the compression roller 21. It was.

Example  3

Figure 4 is a perspective view showing the structure of a lightweight waterproof sheet manufactured by Example 3.

As shown in FIG. 4, the lightweight waterproof sheet manufactured according to Example 3 is further attached with a polyester nonwoven fabric 12 to the lower portion of the polyethylene-based crosslinking foam layer 13 of the lightweight waterproof sheet according to Example 2. It was prepared by.

Example  4

In manufacturing the lightweight waterproof sheet 10 according to any one of Examples 1 to 3 according to the present invention, the aluminum foil is made of a polyester-based nonwoven fabric 12 that is wider in and around 40 mm than the aluminum foil 11 serving as the center substrate. (11) was attached to the top was prepared to have an extension 17 on one side.

5a and 5b are a perspective view and a left side view showing the structure of a lightweight waterproof sheet having an extension.

As shown in FIGS. 5A and 5B, the lightweight waterproof sheet manufactured according to Example 4 includes a non-woven fabric 12 that is about 40 mm wider than that of the aluminum base 11, which is the main substrate, when manufactured according to Example 3. Attached to the top of the foil 11 to form an extension 17 on one side of the top.

The lightweight waterproof sheet 10 manufactured according to the fourth embodiment can omit the connection tape 60 at the connection part by installing the extension part 17 to overlap the upper part of the adjacent sheet, thereby speeding up the construction work. Make it easy.

Figure 6 shows the manufacturing process of the lightweight waterproof sheet of Example 3 or 4 of the present invention.

The polyester-based nonwoven fabric which is transported by the guide roller 20 to the lower portion of the polyethylene-based cross-linking foam layer 13 of the lightweight waterproof sheet 10 manufactured in Example 2 and coated with adhesive from the adhesive supply hopper 23. (12) was prepared by attaching with a pressing roller (21).

In constructing the lightweight waterproof sheet 10 of Examples 1 to 4, a waterproof layer protective pad is required to prevent breakage of the waterproof layer due to self-cracking of concrete at the corner of the concrete floor structure 80 and the wall structure connection part. do.

7 is a perspective view showing the structure of the waterproof layer protection pad according to the present invention.

As shown in FIG. 7, the polyester nonwoven fabric layer 12 is attached to the crosslinking foaming layer 13 and the adhesive coating layer 14 is formed on the lower portion of the crosslinking foaming layer 13 based on the polyethylene crosslinking foaming layer 13. Then, the release paper 15 coated with a release agent was laminated on the lower portion of the adhesive coating layer 14, and then cut into a width of 50 mm or 100 mm to prepare.

The waterproof layer protection pad 16 is intended to solve the problem that when the concrete itself cracks occur at the corners of the concrete floor structure 80 and the wall structure connection part, the waterproof layer bonded to the structure is also broken together. ) And the construction is attached to the wall structure to prevent breakage due to the elongation of the protective pad 16 itself when a small crack occurs, and in case a large crack exceeding the correction point occurs, the pad itself is torn and absorbs the impact caused by the breakage. Protect the waterproof layer formed on top.

Example  5

8 is a view for explaining a waterproof method using a lightweight waterproof sheet 10 according to the present invention.

In order to construct a lightweight waterproof sheet 10 according to the present invention as shown, first, by expanding the polyethylene film 40 or more than 500mm wide with an air passage substrate on the floor of the roof concrete floor structure 80, the bottom One degassing tube 30 is installed per 200 m 2 of structure 80. The degassing pipe 30 discharges gaseous air generated in the lower concrete structure of the polyethylene film 40 into the air.

After the degassing installation, the release paper is removed from the concrete floor structure 80 walls and the corners at which the floor extends to attach the waterproof layer protection pad 16, and the lightweight waterproof in the direction perpendicular to the direction in which the polyethylene film 40 is unfolded. The sheet 10 is installed to be adjacent to each other at intervals of about 5 mm, and a connecting tape 60 is attached to the connection portion of the sheet and the connection portion of the waterproof layer protection pad 16. When the lightweight waterproof sheet 10 having the extension 17 according to the fourth embodiment is installed on the polyethylene film 40, the attaching step of attaching the connection tape 60 may be omitted.

Lastly, the light-proof waterproof sheet 10 is formed by sequentially forming an exposed coating waterproof layer 50 and a waterproof coating layer 70 on top of the lightweight waterproof sheet 10.

In forming the coating film waterproofing layer 50, lytone and perlite used only as the main heat insulating material may be mixed with the coating film waterproofing agent. When the mixture is constructed by mixing the lytons and the perlites, it is possible to further maintain a pleasant environment and to save energy of the structure, and also to lower the thermal conductivity of the coating layer 50 itself to further extend the life of the entire waterproof layer.

If the roof waterproofing using the lightweight waterproof sheet according to the present invention, there is no deformation in the heat wave and cold waves in a short time will be able to construct a roof waterproof layer having high durability and insulation effect.

1 is a perspective view showing the structure of a lightweight waterproof sheet according to Embodiment 1 of the present invention;

Figure 2 is a perspective view showing the structure of a lightweight waterproof sheet according to a second embodiment of the present invention,

Figure 3 is a manufacturing process of the lightweight waterproof sheet of Examples 1 and 2 of the present invention,

Figure 4 is a perspective view showing the structure of a lightweight waterproof sheet according to a third embodiment of the present invention,

5a and 5b are a perspective view and a left side view showing the structure of a lightweight waterproof sheet according to a fourth embodiment of the present invention;

6 is a manufacturing process of the lightweight waterproof sheet of Examples 3 and 4 of the present invention,

7 is a perspective view showing a structure of a corner waterproof layer protection pad according to the present invention;

8 is a view for explaining a waterproof method using a lightweight waterproof sheet according to the present invention.

※ Explanation of code for main part of drawing

10: lightweight waterproof sheet 11: aluminum foil

12 nonwoven fabric 13: cross-linking foam layer

14 adhesive coating layer 15 release agent coating release paper

16: waterproof layer protective pad 17: extension

20: guide roller 21: crimping roller

22: glue tank 23: glue supply hopper

30 degassing tube 40 polyethylene film

50: coating film waterproof layer 60: connection tape

70: waterproof coating layer 80: floor structure

Claims (6)

Lightweight waterproof sheet, characterized in that the aluminum foil (11) having a thickness of 2 to 20㎛ as a center substrate, the non-woven fabric 12 is attached to the upper and lower sides of the aluminum foil (11). Manufactured by attaching a polyester-based nonwoven fabric 12 on the aluminum foil 11 and a polyethylene-based crosslinking foaming layer 13 on the bottom with an aluminum foil 11 having a thickness of 2 to 20 μm as a center substrate. Lightweight waterproof sheet, characterized in that. The method of claim 2, Lightweight waterproof sheet, characterized in that the polyethylene-based cross-foaming agent layer 13 is prepared by attaching an additional layer of a polyester-based nonwoven fabric coated with an adhesive 12. The method according to any one of claims 1 to 3, Lightweight waterproof sheet, characterized in that the extension portion 17 is formed on the upper side by attaching a non-woven fabric 12 to 30 ~ 60 mm wider on the top of the aluminum foil (11). Unfolding and fixing the polyethylene film 40 having a width of 500 mm or more on the bottom of the roof concrete floor structure 80; Installing one degassing pipe 30 per 150-200 m 2 area of the rooftop concrete floor structure 80; Attaching a waterproof layer protection pad 16 to a corner of the roof concrete floor structure 80 and an extended wall; Installing the lightweight waterproof sheet 10 adjacent to each other at intervals of about 5 mm in a direction orthogonal to the upper portion of the polyethylene film 40; Attaching a connection tape 60 to a connection portion between the lightweight waterproof sheet 10 and a corner portion protection pad 16 connection portion; Forming an exposed coating waterproof layer 50 on the lightweight waterproof sheet 10 and the connection tape 60; And Forming a waterproof coating layer 70 on the coating waterproof layer 50; Lightweight waterproof sheet construction method comprising a. Unfolding and fixing the polyethylene film 40 having a width of 500 mm or more on the bottom of the roof concrete floor structure 80; Installing one degassing pipe 30 per 150-200 m 2 area of the rooftop concrete floor structure 80; Attaching a waterproof layer protection pad 16 to a corner of the roof concrete floor structure 80 and an extended wall; Installing the extension part 17 of the lightweight waterproof sheet 10 so as to overlap the upper portion of the adjacent sheet in a direction orthogonal to the upper portion of the polyethylene film 40; Forming an exposed coating waterproof layer 50 on the lightweight waterproof sheet 10; And Forming a waterproof coating layer 70 on the coating waterproof layer 50; Lightweight waterproof sheet construction method comprising a.

Images