KR100552452B1 - Roof waterproofing construction structure and its construction method by insulation-ventilation-shock-bsorbing sheet of the roof-exposure type and air-vents - Google Patents

Abstract

The present invention relates to a rooftop waterproof structure using a rooftop exposed insulation ventilation buffer sheet and an air vent, and a rooftop waterproofing method using the same. The purpose of the present invention is to effectively discharge water vapor pressure generated in the concrete base, and to severely change the thermal expansion of the sheet. It is to provide a roof roof waterproof structure using a roof-top exposed insulation ventilation buffer sheet and air vents to improve water resistance and durability, and a roof waterproofing method using the same.

The present invention relates to a bond and adhesive layer formed locally applied to the bottom surface of the concrete slab, and a plurality of ventilation buffer sheets continuously contacted with the bottom surface of the concrete slab by the bond and adhesive layer and provided with irregularities at the bottom thereof. A buffer layer layer, a joint tape layer installed on the joint between the one side of the ventilation buffer sheet and another adjacent ventilation buffer sheet, and the ends of the plurality of ventilation layer sheets to secure the concrete slab bottom surface, respectively A two-component system is formed by applying to the upper surface of the fixed hardware, the joint tape layer, the air-permeable layer sheet layer to communicate with the bottom surface of the concrete slab; 1,2 urethane layer, and the urethane top coat layer is formed by coating on the cured two-component first and second urethane layer The present invention provides a rooftop waterproof structure and a rooftop waterproofing method using a rooftop exposed insulation cushioning sheet and air vent.

Waterproof method, ventilation cushion seat, air vent, joint tape, irregularities

Description

Roof waterproofing construction structure and its construction method by insulation-ventilation-shock-bsorbing sheet of the roof-exposure type and air-vents}             

1 is a cross-sectional view showing a schematic waterproof structure according to the present invention

Figure 2 is a cross-sectional view showing the structure of the insulating ventilation buffer sheet according to the present invention

* Explanation of symbols for main parts of the drawings

(1): Concrete slab bottom surface (2): Bond and adhesive layer

(3): Insulation ventilation buffer sheet layer (4): Joint tape layer

(5): fixed hardware (6): stainless air vent

(7): two-component first and second urethane layers (8): urethane top coat layer

(31): Ventilation buffer seat (32): Central protrusion

(33): Peripheral protrusion (34): Vent

The present invention relates to a rooftop waterproof structure using a rooftop exposed insulation ventilation buffer sheet and an air vent and a rooftop waterproofing method using the same. The insulating ventilation cushioning sheet is adhered to the floor concrete by adhesive bonding, and the joints between the sheets are butyl rubber tape. After the reinforcement, install fixed irons at regular intervals on the seat end and the center, and install the roof air-exposed insulation vent buffer sheet and air vent that have improved water resistance and durability by installing stainless air vent and two-component polyurethane on the top of the seat. It relates to a rooftop waterproof structure used and a rooftop waterproofing method using the same.

In general, the roof of the building is most in contact with external factors, and the insulation and the waterproofing agent are installed for thermal insulation and waterproofing, and the waterproofing method of the civil and building constructions is asphalt waterproofing method, sheet waterproofing method, coating film. Waterproofing methods are used. Asphalt waterproofing method has the longest history of use, has many uses, and has accumulated a lot of construction experience.However, it must be heated and melted at the construction site. It is a method that may cause loss of waterproofing performance due to self-cracking of waterproofing film due to temperature difference.

Sheet waterproofing method is a method of manufacturing synthetic rubber or thermoplastic synthetic resin in the form of sheet having 1.0 ~ 3.0mm thickness and 100 ~ 200cm width and bonding to waterproof surface at the construction site to form waterproof layer. In addition to excellent durability against climate and ozone, it is possible to secure a waterproof layer with a certain thickness as a whole, and has the advantage of easy construction. In this case, the watertightness of the joint between the sheets could not be achieved, and there could be a leakage accident. Partial repair was difficult, and the waterproof layer swelled due to the vapor pressure of the solvent in the adhesive or the water vapor pressure of the cement concrete matrix. In particular, when the swelling phenomenon of the waterproof layer occurs, the coating film is damaged by repeated contraction and expansion due to the temperature difference between day and night, summer and winter, so there is a problem that the waterproof performance is lost. In addition, the sheet and the concrete is to be bonded to each other only with an adhesive or a primer, there is also a problem that the adhesive force is lowered due to high water vapor pressure or external force and the sheet falls off from the bottom surface.

In addition, the waterproof coating method is divided into acrylic waterproofing, chloroprene waterproofing, urethane waterproofing, etc. according to the type of material, and it is applied in the liquid state at the work site and forms a waterproof coating film according to the chemical reaction or volatilization of the solvent. Because it is applied in a state of application, it is easy to construct a complex part, seamless construction is possible, and it has the advantage of good adhesion between the layers of the waterproofing material and the waterproof surface, high mechanical strength and durability, but it is applied in the liquid state at the work site. Due to its good flowability, the film thickness becomes uneven due to the curvature of the floor, and it is difficult to solve the cracks of the lower part because it is a method that adheres to the entire surface, and swelling such as waterproofing of the sheet occurs due to evaporation of concrete moisture. The phenomenon of losing the waterproof performance occurred.

As described above, the waterproofing work on the rooftop slab is mainly made of a coating material that is cured after application of the sheet and the liquid. Therefore, the stress generated at the crack of the base surface is directly transmitted to the waterproofing layer, so that the waterproofing layer is broken and thus the waterproofing performance is improved. The concrete that is lost and also the waterproofing base is penetrated by rain, snow, or new building may contain a large amount of water mixed inside when constructing concrete. When rises, water vapor pressure is generated, causing the waterproof layer to float, causing leakage. In particular, the swelling of the sheet waterproofing and the waterproofing of the coating film is caused by the expansion of the air layer sealed by the peeling of the pinhole or the mortar of the surface concrete in addition to the moisture of the concrete matrix is a big problem to be solved in the waterproofing method by the close method.

The present invention has been made in consideration of the above problems, the object of which is to effectively discharge the water vapor pressure generated in the concrete base material, to mitigate the severe change due to thermal expansion of the sheet, roof exposed insulation ventilation to improve the water resistance and durability The present invention provides a roof waterproof structure using a cushion seat and an air vent and a roof waterproof method using the same.

In order to achieve the object as described above, the present invention is in close contact with the floor concrete in a local adhesive instead of the front contact type cushioning insulation, and the joints between the sheets are reinforced with butyl rubber tape having excellent adhesive strength To fix the adhesive force of local point adhesiveness by installing fixed hardware at regular intervals at the end and the center of the sheet, and forming a composite with the sheet by applying two-component polyurethane on the upper surface of the sheet to form a waterproof body having excellent physical properties. It is.

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

1 is a cross-sectional view showing a schematic waterproof structure according to the present invention, the present invention is a bond and adhesive layer (2) formed locally applied to the concrete slab bottom surface (1), the bond and adhesive layer (2) a layer of aeration layer for continuous contact with the bottom surface of the concrete slab and a plurality of aeration buffer sheets provided with concave and convexities at the bottom thereof; and (3) the one side ventilation buffer sheet and another aeration buffer neighboring thereto. Joint tape layer (4) provided at the joints between the seats, fixing hardware (5) for fixing the ends of the plurality of ventilation buffer sheets to the concrete slab bottom surface, respectively, the joint tape layer (4), ventilation buffer An air vent (6) installed through the seat layer (3) so as to communicate with the space between the concrete slab bottom surface (1) and the air cushion sheet layer (3), and the air buffer buffer layer provided with the air vent (6) (3) the top Consists of a two-component system the first and second polyurethane layer (7) and a polyurethane top coat layer 8 formed the cured two-component system the first and second polyurethane layer (7) is applied on the top coating is formed.

The bond and adhesive layer (2) is for the smooth adhesion of the concrete and the insulation cushioning sheet, using a chloroprene synthetic rubber-based adhesive that is excellent in the workability of HERA or rollers and does not cause deformation of the insulation ventilation buffer sheet. And is applied locally to the concrete slab bottom.

The insulation ventilation buffer sheet 31 is a synthetic resin foam having excellent breathability and cushioning properties, very low water absorption and strong alkali resistance, so as not to deteriorate in alkaline moisture of concrete ground, and having irregularities having a thickness of 0.8 to 1.5 mm at the bottom. Use the one whose total thickness is 2.0 ~ 3.5mm. That is, Figure 2 shows an exemplary view showing the structure of the insulating ventilation buffer sheet according to the present invention, a plurality of irregularities having different sizes are formed at the bottom, concrete slab bottom surface by the irregularities as described above It is adhesively attached to.

The unevenness is composed of a central protrusion 32 having a diameter of 20 mm and a peripheral protrusion 33 having a diameter of 8 mm, and a plurality of peripheral protrusions 33 are formed around the central protrusion 32. Another central protrusion adjacent to the central protrusion is formed to maintain the same interval, and another peripheral protrusion adjacent to one side of the protrusion is formed to maintain the same interval. In addition, the central protrusion 32 and the peripheral protrusion 33 have a thickness of about 2.5 mm, have a thickness of about 1 mm, and four peripheral protrusions are formed around one central protrusion. That is, the ventilation buffer sheet is formed so that the vent hole 34 is formed by the space formed between the central projection portion and the peripheral projection portion.

In addition, one side of the air cushion sheet and another adjacent air buffer sheet is installed in a space between 2 to 3 mm apart from each other in consideration of the shrinkage and expansion of the sheet, the distance between the parapet and within 20 to 30 mm Install it.

The joint tape layer (4) is used for sealing treatment and insulation of the concrete underneath at the joints of the insulation buffer sheet for insulation, and is manufactured by applying a butyl rubber-based adhesive having excellent water resistance to the polyethylene network, Excellent tensile strength and elongation, mechanical properties, water resistance, weather resistance, heat resistance, and cold resistance. In addition, the thing of 0.5-1.5 mm in use thickness is used, and the thing of 50-100 mm in width is used.

The fixing hardware (5) can be applied to a sheet of various materials by the application of a mechanical partial fixed method and fixed with a tableting gun made of stainless fixing nails and washers for the purpose of fixing the waterproof layer to the floor. At this time, if the fixed steel is too high pressure to break the concrete base so that the complete fixing is not made, by adjusting the pressure in accordance with the concrete strength to install three to seven places per square meter.

The air vent 6 serves to discharge the water vapor pressure generated in the base surface together with the insulating ventilation buffer sheet, and prevents the inflow of water as a molded article made of stainless steel having a thickness of 1.0 to 1.5mm. In addition, one air vent is installed per 50 to 100㎡ according to the water content of concrete, and before installing, the insulation vent buffer sheet is cut to fit the central part of the air vent, and the vent (central protrusion and Spaces between peripheral protrusions) are in communication with each other.

As described above, the present invention provides a bond and adhesive layer (2) from the concrete slab bottom surface (1), a ventilation cushion sheet layer (3) for insulation, a joint tape layer (4), a fixing iron (5), and a stainless air vent (6). And a two-component first and second urethane layer 7 and a urethane top coat layer 8 are laminated in this order, and locally apply a bond and an adhesive to the bottom surface of the concrete slab, By installing a plurality of ventilation buffer sheet with concave and convex in the lower portion continuously, and reinforced by connecting the installed ventilation buffer sheet with butyl rubber tape, the end of the plurality of ventilation buffer sheet to the concrete slab bottom surface by the fixing iron And a stainless air vent is installed so as to communicate with the air vent (the space between the central protrusion and the peripheral protrusion) of the ventilation buffer sheet, and the two-component polyurethane and the right side of the upper surface of the ventilation buffer sheet. It is applied to a carbon topcoat.

Hereinafter, the construction method using the configuration used in the present invention will be described in detail by the following examples.

Example

First step

Perform background cleanup, repair and reinforcement work. Remove dust or foreign matter from the base surface and apply crack seal to the place where the silk rack is cracked. Use crack seal or reinforcement for cracks of 0.3mm or more.

2nd step

Apply a bond and glue to the cleaned base using a local roller. When applying the bond and adhesive on the front side, care should be taken to prevent the bond and adhesive from entering the uneven portion of the insulating ventilation buffer sheet.

3rd step

Cut and install the air cushion sheet. The roof drain is cut to fit the shape and is installed at intervals within 20 ~ 30mm from the parapet. The seat and the seat are spaced 2 ~ 3mm apart considering the shrinkage expansion of the sheet.

4th step

The joint tape is 50 ~ 100mm wide and installed in the center of the joint.

5th step

A mechanical hardware is installed to secure the end of the insulation ventilating seat. By controlling the pressure depending on the concrete strength will be installed 3-7 points per 1m ^2. If the pressure is too high, the bottom of the concrete will be destroyed and it will not be completely secured.

6th step

Install a stainless air vent. The air vent is installed in one place per 50~100m ² according to the water content of the concrete and produce by cutting the aeration buffer insulating sheet along a circle of diameter Lemme 5~8cm approximately the center portion of the air vent prior to installation.

7th step

A two-component urethane is applied to the upper surface of the insulating ventilation buffer sheet using a roller.

8th step

It is applied after sufficiently stirring with the urethane main agent and the curing agent.

9th step

The urethane is cured and finished with a top coat. Topcoat is applied after stirring the main body and the curing agent as well as urethane.

Insulation ventilating sheet test items and results regarding the properties of the insulation ventilating sheet and the overall waterproofing material used in the invention are as follows.

TABLE 1

Test Items result Test Methods Apparent density (g / cm3) 0.051 KS M 3014-'96 Tensile Strength (N / ㎠) 59 Elongation Rate (%) 207 Compression Hardness (N / ㎠) 4.7 Tear strength (N / cm) 36 Compressive permanent strain (%) 12.7 Heating dimension change (%) -0.77 Absorption rate (g / cm 3) A law 0.015 Thermal Conductivity (W / m · k) Average temperature 20 ℃ Specimen thickness 20.1㎜ 6 sheets 0.040 KS L 9016-'95

In addition, the waterproofing material performance according to the present invention is as shown in [Table 2].

TABLE 2

Test Items result Reference value Test Methods Tensile Strength (N / ㎠) 60 60 or more KS F 4911-'97 % Elongation 380 250 or more Tear strength (N) 41 30 or more  Temperature dependence The tensile strength (%) -20 ℃ 200 - 0 ℃ 83 - 60 ℃ 46 24 or more 80 ℃ 45 - Elongation (%) -20 ℃ 274 50 or more 0 ℃ 252 - 20 ℃ 194 - 60 ℃ 196 - 80 ℃ 197 - Heating stretch phase (elasticity, mm) Shrink 1.6 4 or less Tensile performance after deterioration treatment Tensile Strength Ratio (%) Heat treatment 115 80 or more Alkali treatment 93 80 or more Elongation Ratio (%) Heat treatment 119 70 or more Alkali treatment 123 80 or more Even fatigue resistance clear - KS F 4917-'97  Impact resistance General Psalm  Drop height 30 cm clear - KS F 4715-'01 60 cm clear - 90 cm clear - 120 cm clear - copula 30 cm clear - 60 cm clear - 90 cm clear - 120 cm clear -

As described above, the present invention effectively improves the water vapor pressure generated in the concrete base to the top of the two-component urethane applied to the top using a breathable cushioning sheet having excellent breathability and a stainless steel air vent that can pass only air without passing water. It can be discharged into the furnace, thereby preventing the swelling of the sheet in advance.

In addition, in the work of the buffer sheet, the joint portion of the sheet was conventionally in the form of a fully close butt or obova, but in the present invention, the thermal expansion of the sheet was considered to be 2 to 3 mm apart, and the butyl rubber on the butt portion of the sheet was considered. The insulating tape made of material is used to mitigate the severe change caused by the thermal expansion of the sheet, and to have the insulation effect of the space between the sheets.

In addition, durability is improved by installing bonds and fixed irons to increase the adhesion force according to the local adhesion of the floor surface of the rooftop slab or concrete structure and the insulating ventilation buffer sheet.

In addition, the ventilation contact sheet is installed by the local contact, easy to maintain, there is a lot of effects, such as to reduce the economic burden during maintenance.

Claims (8)

Bond and adhesive layers formed locally on the floor of the concrete slab, There are a plurality of ventilation buffer sheets having concavities and convexities formed in the thickness of 0.8 ~ 1.5 mm by the contact and the adhesive layer in contact with the bottom surface of the concrete slab and the central protrusions and peripheral protrusions having different diameters spaced apart at regular intervals. Continuously installed ventilation buffer sheet layer, A joint tape layer provided at a joint portion between the one side cushioning sheet and another neighboring sheet, Fixing hardware for fixing the ends of the plurality of ventilation complete layer sheets to the concrete slab bottom surface, respectively; Through the joint tape layer and the ventilation layer sheet layer, the lower end is installed so as to communicate with the ventilation hole (space between the central projection and the peripheral protrusion) of the ventilation buffer sheet, and one place is installed per 50 to 100㎡ according to the moisture content of the concrete. Air vents, A two-component first and second urethane layer formed by being applied to an upper surface of the air vent complete layer sheet layer provided with the air vent, Roof top waterproof structure using a roof-top exposed insulation ventilation buffer sheet and air vent, characterized in that made of a urethane top coat layer formed by coating the cured two-component first and second urethane layer. delete delete delete delete delete A first step of removing, repairing, and reinforcing foreign materials on the concrete slab base surface; A second step of applying a bond and an adhesive using a local roller on the arranged base surface; The locally applied bonds and adhesives are continuously provided with a plurality of ventilation buffer sheets having concavities and convexities at the bottom thereof, and the plurality of ventilation buffer sheets have one or two ventilation buffer sheets and another ventilation buffer sheet adjacent thereto. A third step of installing spaced apart from the parapet and spaced within 20 to 30 mm; A fourth step of primarily watertightly processing the plurality of continuously installed cushioning sheets with a joint tape; A fifth step of fixing the ends of the plurality of ventilation buffer sheets to the concrete slab base surface by fixing hardware, and installing 3 to 7 per square meter; A sixth step of installing a plurality of air vents in the plurality of ventilation buffer seats fixed by the fixing hardware, the lower end of the air vents being in communication with the unevenness of the ventilation buffer sheet; A seventh step of forming a first and second urethane layers by applying a two-component urethane to the upper surface of the insulating vent buffer sheet having the air vent installed by using a roller; Rooftop waterproof method using a roof-top exposed insulation ventilation buffer sheet and air vents comprising an eighth step of forming a top coat on the cured first and second urethane layer. delete

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