JPS60105718A - Executing method for moisture protection work for space under floor - Google Patents

Abstract

PURPOSE:To prevent exfoliation of a moisture resistant film and to always maintain a space under floor in a dry condition, by a method wherein, after resin is spread over the lower end of a rise of a strip footing or a footing of floor post and a portion therearound, a moisture resistant film is forced into firm adhesion to soil under the floor to secure it thereto. CONSTITUTION:After resin or asphalt and mixture (resin) 4 of them is spread over the lower end of the rise of a strip footing 1 or a footing of floor post, a moisture resistant film 3 is laid in a manner that it approaches the bottom edge of the strip footing 1 or the footing of floor post to force it into firm adhesion to soil for fastening. Isoprene rubber is dissolved in an organic solvent to use it as the spread resin and the like 4, and polyethylene is used as the moisture resistant film 3. An ant resistant agent or an antiseptic solution is previously mixed in the resin, and this causes application of ant resistant treatment or antiseptic treatment simultaneously with execution of a moisture resistant work. As noted above, the moisture resistant film 3 is forced into firm adhesion to the resin 4 and soil under the floor for fastening, resulting in the possibility to prevent exfoliation of the moisture resistant film 3.

Description

[Detailed description of the invention] The present invention relates to a moisture-proof construction method under a building floor.

In general, the area under the floor of a building receives almost no sunlight, is humid, and is warmer than the outside world in winter, so the building's foundation and flooring materials such as joists, floorboards, floorboards, and flooring are susceptible to rotting fungi, termites, etc. Easy to suffer damage. In particular, in cases where ventilation and layout under the floor are poor, or where the floor is low, such damage is even more severe, resulting in a serious problem of extremely shortening the lifespan of the building.

In order to solve this problem, it is necessary to keep the underfloor dry at all times by blocking moisture from the soil under the floor as much as possible. From this point of view, the following three types of methods are known as methods for constructing moisture proofing under floors of buildings.

In other words, 1) a method of pouring concrete of an appropriate thickness over the entire surface of the subfloor, 2) a method of laying a moisture-proof film of an appropriate thickness over the entire surface of the subfloor with a sufficient width, and then laying the overlapping part, the cloth foundation and A method of pressing down the moisture-proof film by placing dry sand or gravel around the interface with the pile stones, 3) After spreading the moisture-proof film over the entire surface of the subfloor in the same manner as in 2), place the overlapping part, the cloth foundation, and the pile stones. This is a method of pasting the boundary surface with adhesive tape.

Among these methods, method (①) requires concrete to be poured to a considerable thickness because the concrete itself has lower moisture resistance than moisture-proof films such as polyethylene film or vinyl chloride film. No further work can be started for four to five days until the concrete has hardened. Furthermore, in the case of concrete, cracks occur in most cases due to drying at the interface between the cloth foundation and the bundled stones, so there is the disadvantage that sufficient moisture-proofing effects cannot be obtained over a long period of time.
In addition, in order to suppress the deterioration of the moisture-proofing effect due to cracks, additional moisture-proofing measures are not taken around the cloth foundation and the bundled stones, which increases the construction cost. In addition, with method 2), the sand and gravel placed as a retainer are likely to be blown away by the wind blowing into the subfloor from the ventilation openings, creating gaps between the cloth foundation or pile stones and the moisture-proof film, making it difficult to obtain a sufficient moisture-proofing effect. do not have.

Furthermore, when assembling the floor after laying the film, the film is often damaged or peeled off, making it difficult to say that this is a desirable moisture-proof construction method. Furthermore, when a forced ventilation system was installed under the floor, the moisture-proof film sometimes peeled off. Although method 3) provides a more sufficient moisture-proofing effect than the three methods mentioned above, it requires much time and effort to install, is expensive, and requires adhesive tape to be bonded to the fabric foundation or pile stones. There are drawbacks, such as the need to apply a primer to the foundation or stone pile in advance in order to achieve sufficient results.

The present invention was made in view of the shortcomings of the conventional moisture-proof construction method under the floor of a building, and provides a moisture-proof construction method for the under floor that is more complete and has excellent long-term durability than the conventional method. To provide a moisture-proof construction method with good workability and low construction cost, and further to provide a moisture-proof construction method that can carry out antiseptic treatment and anti-termite treatment of various flooring materials at the same time as moisture-proof construction.

That is, the present invention is an under-floor moisture-proof construction method in which a moisture-proof film is laid on the sub-floor soil, and in which the moisture-proof film is fixed to the sub-floor soil using resin, asphalt, or a mixture thereof. using resin or asphalt or a mixture thereof as an emulsion;
It also includes a moisture-proof construction method in which a moisture-proof film is fixed to the subfloor soil by adding a preservative and/or a termiticide to resin, asphalt, or a mixture thereof.

The invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a partial perspective view of an underfloor constructed by the moisture-proof construction method of the present invention. In the figure, 1 is a cloth foundation, 2 is a ventilation hole, and 3 is a moisture-proof film laid under the floor.A resin, asphalt, or a mixture thereof ( The moisture-proof film 3 is fixed to the soil 5 by spraying 4 (hereinafter simply referred to as resin etc.). That is, after spraying an appropriate amount of resin, etc. 4 on the lower end of the rising edge of the cloth foundation 1 or bundled stones and the subfloor soil around it, a moisture-proof film 3 is laid close to the bottom edge of the cloth foundation 1 or the bundled stones, and the subfloor soil is removed. Glue and fix.

Examples of the resins (including rubbers, the same applies hereinafter) to be sprayed include isoprene rubber, butadiene rubber, acrylonitrile rubber, vinyl chloride, vinyl acetate, α, β-ethylenically unsaturated carboxylic acid polymers, etc., in an appropriate organic solvent. It can be used after being melted, or it can be used as an emulsion in combination with a surfactant. In addition, as the asphalt, for example, blown asphalt, strain asphalt, etc. can be used by heating and melting, or can be used in combination with a surfactant as an aqueous emulsion (including a suspension of a dispersant type). . Further, these resins or asphalts can be used alone or in combination as a rubber-mixed asphalt emulsion or the like. However, it is desirable to use these resins or asphalts in the form of an emulsion from the viewpoint of workability, safety, permeability into the soil, etc. during construction. When the permeability into the soil is good, the adhesion retention of the moisture-proof film to the soil can be improved.

Next, the amount of resin etc. to be sprayed varies depending on the soil quality of the subfloor soil and the resin or asphalt concentration, etc., but in the case of an emulsion quib with a solid content concentration of about 60%, the amount of resin etc.
,/n? It is enough.

The method of moisture-proofing under the floor by using resin, etc. is to lay a moisture-proof film made of polyethylene, vinyl chloride, etc. on the soil under the floor, overlapping the edges of the film, and before overlapping the moisture-proof film. Moisture-proof film ltt! 5. After spraying resin etc. on the edges and the soil, the moisture-proof film is layered one after another and this is repeated to cover the area. After the edges of the moisture-proof film are layered and spread, the overlapping area and the lower end of the rising edge of the cloth foundation or bundled stones are covered. The moisture-proof film can be fixed to the subfloor soil using an appropriate method, such as a method of spraying a resin or the like on the surrounding soil, or a method of spreading a resin or the like over the entire surface of the subfloor soil and then laying a moisture-proof film.

Furthermore, by adding a termiticide and/or preservative to the resin, asphalt, or a mixture thereof, it is possible to carry out termite-proofing and/or preservative treatment of the floor assembly material simultaneously with the moisture-proofing work under the floor.

Examples of termiticides that can be used in the present invention include organochlorine-based, boron-based, organotin-based, naphthenic acid metal salts, chlornaphthalene-based, organophosphorus-based, and pyrethroid-based insecticides, and Examples of preservatives include phenols, organic tin compounds, naphthenic acid metal salts, chlornaphthalene, and organic iodine compounds. or,
The amount of these termiticides or preservatives added to the resin, etc. is appropriate and varies depending on differences in the construction environment, these conditions, etc.

Test Example Two 500 mI 2-volume wide-mouthed bottles were prepared, and 400 g of soil with a water content of 40% was put into each bottle to fill approximately half of the wide-mouthed bottles, and the two were lightly pressed together.

Next, a polyethylene sheet with a thickness of 0.1 mm and the same diameter as the inner diameter of the wide-mouthed bottle was placed on the soil, and dry sand was sprinkled on one side to secure the periphery of the polyethylene sheet (this was classified as Category A).
). On the other side, the periphery of the sheet was fixed to the soil using an asphalt emulsion mixed with rubber (this is designated as Category B). Then, place 5g of anhydrous calcium chloride on each sheet.
Calcium chloride (
CaC7!2) Water-containing stone was measured. The results are shown in the table below, and it was found that the moisture-proofing effect in Category B was significantly lower than that in Category/l.

Example 1 As shown in the cross-sectional view of construction in Fig. 2, rubber-containing asphalt I/emulsion 4a was applied to the lower end of the raised foundations 1 and bundle stones 6 and the surrounding soil (approximately 20 cm wide). t+1!
/ m, and then the thickness is 0. ] A similar mark is applied to the overlapped edge of the polyethylene sheet of xm Jh
Construction was completed by spraying asphalt emulsion containing lIA.

Example 2 Anionic asphalt emulsion 4b containing 3% chlordane as a termiticide was applied to the entire surface of the subfloor soil under the rise of the foundation 1 and the pile stones 6 as shown in the construction cross-sectional view of Fig. 3. After spraying at a ratio of '/rl, a vinyl chloride sheet 3b with a thickness of 0.2*m was laid over the entire surface of the subfloor soil to complete the construction.

Example 3 A chlorinated rubber emulsion adjusted to a solid content of 40% was sprayed at a rate of 21/m on the lower end of the rising edge of the cloth foundation and pile stones and the surrounding soil (width of about 20c+n) in the same manner as shown in Figure 2. Afterwards, a vinyl chloride sheet with a thickness of 0.1 iim was laid over the entire surface of the subfloor soil. Further, the same chlorinated rubber emulsion was also sprayed on the overlapped edges of the laid sheet to complete the installation.

From the results of the above examples, the underfloor moisture-proof construction method according to the present invention has much better workability than conventional construction methods, and the adhesion of the moisture-proof film to the subfloor soil is also extremely good. It was found that a sufficient moisture-proofing effect can be obtained even when the sub-floor ground surface is extremely uneven. In addition, since resin or asphalt has excellent affinity with the soil and is itself highly waterproof, it is possible to maintain sufficient moisture resistance under the floor even if there is no strict overlapping area when installing the moisture-proof film. can. Therefore, the moisture-proof film will not peel off easily even if wind, rainwater, etc. enter through the ventilation opening, and the moisture-proof film will not shift even if you walk on the moisture-proof film for floor construction after moisture-proof construction. It does not peel and has the remarkable effect of keeping the underfloor dry at all times and preventing rot and insect damage to the floor assembly materials. Furthermore, by adding termiticides and/or preservatives to the resin, asphalt, or a mixture thereof in advance, there is an advantage that it is possible to provide antitermite and/or antiseptic effects to the flooring materials at the same time as performing moisture-proof construction under the floor. .

[Brief explanation of the drawing]

FIG. 1 shows the prevention/S'i! of the present invention. FIGS. 2 and 3 are partial perspective views of the underfloor that has been constructed using the construction method, and sectional views showing an embodiment of the moisture-proof construction of the underfloor according to the present invention. ■...Cloth substrate, 3, 3a, 3b...Moisture-proof film, 4...Resin or asphalt or a mixture thereof, 4a...Rubber asphalt milk Material, 4b... Anionic asphalt milk material, 5
...Soil under the bed, 6...Bound stone. Patent applicant Sanyo Wood Preservation Co., Ltd.

Claims (3)

[Claims] (1) An under-floor moisture-proof construction method in which a moisture-proof film is laid on the sub-floor soil, the method comprising fixing the moisture-proof film to the sub-floor soil using resin, asphalt, or a mixture thereof. (2) The method for moisture-proofing construction under a floor according to claim 1, characterized in that resin, asphalt, or a mixture thereof is used as an emulsion. (3) The method for moisture-proofing an underfloor construction according to claim 1 or 2, which comprises adding a preservative and/or a termiticide to the resin, asphalt, or a mixture thereof.