JPS5985062A - Waterproof construction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproofing construction method, and more specifically provides a cold construction asphalt waterproofing construction method.

Conventionally, for asphalt waterproofing, a sheet-like material made by impregnating a bituminous material into a sheet base material such as paper or fiber cloth has been used. However, in such a sheet-like material, the gaps between the structures of the sheet base material are not completely filled with the bituminous material, so when performing asphalt waterproofing using such a sheet-like material, it is necessary to separate the sheet-like material and the asphalt layer. The waterproof layer must be alternately formed in 5 to 12 layers.1- The work is complicated, and the elongation rate of the sheet material and asphalt layer itself is low, so Occurrence of Cracks 1 - If the waterproof layer is subjected to repeated fatigue over time, cracks will also occur in the waterproof layer, causing the waterproof layer to lose its function.

This invention relates to a new asphalt waterproofing method that solves the problem of the above-mentioned decrease in waterproofing ability due to repeated fatigue in a waterproofing method using asphalt as a main material. and a first layer consisting of a bituminous material layer having a Mooney viscosity of %1t-1-4 (root 3) 10 to 45, which contains a bituminous material, a softening substance, and a filler; A second layer consisting of a polymeric material layer which is sufficiently waterproof and stretchable, and a third layer consisting of a viscous adhesive material layer containing rubber and/or synthetic resins are combined in this order. Paste the third layer side of the waterproof sheet,
Asphalt emulsion resin is applied to the surface of the first layer.

In addition, if necessary, the above-mentioned waterproof sheet is further attached to the asphalt-coated surface, and asphalt is coated on that surface.
It may be applied twice or more, but one application is sufficient to obtain a waterproof layer having the same waterproofing effect as conventional asphalt waterproofing.

The first layer of the waterproof sheet used in this invention contains about 100 parts by weight of a rubber such as butyl rubber, neoprene rubber, styrene butadiene rubber, ethylene propylene rubber, ethylene-propylene terpolymer, natural rubber, etc. Preferably 20 to 30 () parts by weight 1. < is 50-200
Parts by weight, about 10 to 100 parts by weight of filler, preferably 30 to 100 parts by weight
80 parts by weight, preferably about 10-10 parts by weight of softening material 1. <
Mooney viscosity ML1 is obtained by adding 20 to 90 parts by weight and other known compounding agents such as anti-aging agents, pigments, stabilizers, etc.
+4 (100°C) 1ON45 Preferably adjusted to 15-40 1. A dairy product containing a mixture formed into a sheet ((1,1 to 3W11 thickness, preferably (2 to 1.5W thickness)) is used.

The reason why the bituminous material is set at 20 to 30 parts by weight is that if it is less than 20 parts by weight, the adhesion with the asphalt applied to the surface of the @1 layer will be poor, and if it is more than 300 parts by weight, the @1 layer will become too hard. This is because the adhesion with the @2 layer is poor. The filler is a known filler such as lucium carbonate or clay.
It is used within the range of 10 parts by weight, and if it is less than 10 parts by weight, the effect of addition cannot be obtained, and if it is more than 10 parts by weight, the first part becomes too hard, so it is preferable. Paraffin, wax, petroleum resin, terpene resin, rosin resin, etc. are used to check the flexibility of @1 layer, and it is preferably in the range of 10 parts by weight to 1 part by weight. 10 parts by weight. If it is less than 100 parts by weight, the effect of addition cannot be obtained, and if it is more than 100 parts by weight, the @1 layer becomes too soft.

However, these rubbers, bitumen, fillers, softeners, and compounding agents are combined in appropriate amounts, and the viscosity of the resulting mixture reaches Mooney viscosity ML1+4 (100
°C) 10-45 preferably 1-< is adjusted to 15-40,
The effects of the asphalt waterproofing method of this invention can be maximized. Mooney viscosity ML1+4 (100
℃) or less than 10 is too soft and the adhesive strength is weak, and if it is 45 or more, the adhesiveness with the second layer is poor and there is a risk of cracking when the waterproof sheet is rolled into a roll. Undesirable.

In addition, appropriate amounts of known vulcanizing agents, vulcanization accelerators, and vulcanization accelerators may be added to the mixture, if necessary.

The second layer of the waterproof sheet used in this invention includes the rubber and/or polyvinyl chloride used in the first layer,
Synthetic resins such as polyethylene are appropriately combined with known compounding agents such as fillers and vulcanizable substances, and formed into a sheet-like material (0.3 to 3 M) having appropriate sinterability and elasticity. A polymer material is used.

Between the layers of the sheet-like material, at least one surface has elasticity equal to or greater than that of the sheet-like material in order to improve properties such as strength and durability of the sheet-like material. 1. Reinforcing core materials such as plastic films, stretchable non-woven fabrics and woven fabrics, plastic nets, etc. can also be used. It may be fixed.

The third layer of the waterproof sheet used in this invention may be made of non- or unvulcanized rubber alone or a mixture of such rubber with a tackifying agent such as petroleum resin or terpene resin, or acrylic resin or polyvinyl ether resin. A viscous adhesive substance having excellent adhesion to the underlying surface and deformability, such as a copolymer mainly composed of resins, is used.

The first layer consists of these bituminous material layers, the second layer consists of a polymeric material layer, and the third layer consists of a viscous adhesive substance layer.
The layers are combined in this order to create an asphalt tarpaulin. Bonding between each layer can be achieved by forming each layer in advance into a sheet and then bonding using an adhesive such as an adhesive, or by utilizing the self-adhesive properties of the first and second layers. , but that's fine. 1. Prepare a sheet-like material constituting the second notification in advance17, and place the first one on one side of the sheet-like material.
The layers may be integrally bonded by applying a viscous adhesive substance forming the layer @3 on the other side of the mixture forming the layer.

The tarpaulin sheet for asphalt waterproofing constructed in this manner is adhered to the base surface with the third layer via a brimer or an adhesive layer as required. Next, an asphalt emulsion is applied to the first layer surface of the waterproof sheet adhered to the base surface.

The waterproofing construction method of the present invention is constructed using a simple asphalt waterproofing tarpaulin sheet obtained by laminating a first layer, a second layer, and a third layer to form an asphalt waterproofing layer. Therefore, unlike conventional asphalt waterproofing, there is no need to apply asphalt multiple times, and a good waterproof layer can be obtained with a small number of applications.Moreover, it has the operational advantages of being easy to apply, and it can be used as a second layer. Since we used a polymeric sheet material that itself has sufficient waterproofness and elasticity, it has good repetition resistance and fatigue resistance, and even if a crack occurs in the asphalt layer of the waterproof layer, the sheet material will not break. It has the characteristic that the waterproof layer maintains its good function over a long period of time because it stretches without causing any damage.

Next, examples of this invention will be shown. The section indicates the M section.

Example 1st layer compounded styrene-butadiene rubber 100 parts stearic acid 2I/paraffin
3 “Bitumen”
150 Process oil
20 Filler
50. u Petroleum resin 10
n2nd layer compounded styrene-butadiene rubber 100 parts zinc white
5〃Stearic acid
1 part carbon black
50 Filler
30n vulcanizing agent
2 II vulcanization accelerator 1
．． 5. The composition of the first layer is kneaded and rolled with a calendar roll to form a sheet for the first layer (Mooney viscosity ML1+4 (to
o°C) 15) is obtained.

The composition of the second layer was kneaded and rolled with a calendar roll to obtain a sheet with a thickness of 1 fl, and the sheet was heated at 150° C. for 10 minutes to improve waterproofness and elasticity. A second layer sheet made of a polymeric material having the following properties is obtained.

Then, the sheet for the first layer and the sheet for the second layer are bonded together by pressure bonding, and a viscous adhesive mixture made of unvulcanized butyl rubber is applied to the other surface of the sheet for the second layer to a thickness of 0.8 mm. A tarpaulin sheet for waterproofing asphalt is obtained by applying it to form a coating layer.

This waterproof sheet is applied to the concrete base surface through a coating layer.
Paste and crimp! 7. Apply asphalt emulsion (nonvolatile content 55 EL) viscosity g 625 centivoise (at 25°C) pH 6) to a thickness of about 2 nI on the @1 layer surface.1. Asphalt waterproofing construction completed 1. Ta. The asphalt waterproof layer formed in this way has strong adhesion between the asphalt and the first layer of the waterproof sheet at the interface, and has sufficient waterproofness even if cracks occur in the asphalt coating layer. there were.

patent applicant Nitto Raiki Kogyo Co., Ltd. Representative Sanbe Hijikata

Claims (1)

[Claims] 1) Mooney viscosity ML1+4 (100°C) 10 containing at least rubber, bituminous material, softening substance and filler on the base surface
A first layer consisting of a soft bituminous material layer of ~45 and a second layer consisting of a layer of polymeric material containing rubber and/or external resins and which is itself sufficiently waterproof and elastic. Attach the third layer surface of the asphalt waterproofing sheet, in which @3 layers consisting of viscous adhesive material layers containing rubber and /''! or synthetic resins are combined in this order I2, @
A waterproofing construction method characterized by coating one layer of asphalt emulsion.