JPH0642148A - Anti-corrosive sheet floor surface constructing method and precast board for it - Google Patents

Abstract

PURPOSE:To provide an anti-corrosive floor which can be completed with a short construction term and exerts an excellent anti-corrosive effect for a long period of time. CONSTITUTION:Procedures of constructing a floor surface lined with anti-corrosive sheet comprises placing concrete to form a floor bed 1, applying an adhesive or mortar 2 to the surface, laying precast plates 3 of mortar lined with an anti-corrosive sheet 3a made from synthetic resin while the applied adhesive or mortar 2 remains wet, and attaching together the ends of such sheets 3a of adjoining precast plates 3 by means of fusion attachment with the resin 4. Each precast plate 3 is structured so that a number of anchors 30a projecting at the rear surface of each anti-corrosive sheet 3a are embedded in a mortar layer 3b including a reinforcing material 3c and that the sheets 3a are fixed to the surface of the mortar layer 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a floor surface of an anticorrosion sheet and a precast board used in this method.

[0002]

2. Description of the Related Art A concrete floor anticorrosion method includes a method of adhering an anticorrosion sheet or an anticorrosion tile to the floor to cover and protect it from corrosion.

Although this anticorrosion method is relatively simple and efficient, it has the following problems when a floor such as a sewage treatment tank or a chemical solution storage tank is constructed.

[0004]

That is, when an anticorrosion sheet is bonded to a concrete floor surface, since the concrete floor surface is a rough uneven surface, a defective adhesion portion is likely to occur, and concrete is a material that is easily cracked. Therefore, the groundwater permeates through the cracked portion of the floor concrete and accumulates at the adhesion failure portion of the sheet. Then, the sheet pressure swells due to the water pressure or steam pressure of the groundwater, and the sheet peeling progresses, and finally the sheet is destroyed and the concrete is severely eroded, and the chemical solution and sewage leaking from the eroded portion causes the surrounding soil. There was a problem that was polluted.

On the other hand, when the anticorrosion tiles are adhered, there is a problem that the work is troublesome because of the small size and the weak points between the tiles are likely to occur. Further, since it takes a considerable time to form these anticorrosion layers, there is a problem that the construction period is prolonged.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a novel method of constructing a floor surface of an anticorrosion sheet which has a short construction period and can exhibit an excellent anticorrosion effect for a long period of time, and this construction. It is to provide a new precast plate used in the method.

[0007]

In order to achieve the above object, a method of constructing a floor surface of an anticorrosion sheet according to the present invention is to form a floor by placing concrete and then apply an adhesive or mortar to the surface. Then, lay a precast plate made of mortar with a synthetic resin anticorrosion sheet adhered to the surface within the pot life of the adhesive or mortar, and resin weld the ends of the anticorrosion sheet of adjacent precast plates. Is characterized by.

In the precast plate of the present invention used in this construction method, a large number of anchors protruding from the back surface of a synthetic resin anticorrosion sheet are embedded in a mortar layer containing a reinforcing material to form an anticorrosion sheet. It is characterized in that it adheres to the surface of the mortar layer.

[0009]

As in the construction method of the present invention, if a mortar precast plate having a synthetic resin anticorrosion sheet adhered to its surface is laid out within the pot life of the adhesive or mortar applied to the floor surface, The laborious work of adhering anticorrosion sheets and anticorrosion tiles as in the past is not necessary, and the floor surface of the anticorrosion sheet can be constructed simply by resin welding the ends of the anticorrosion sheets on the surfaces of adjacent precast plates. Things will disappear.

Moreover, since this precast plate is one in which the anchor on the back surface of the anticorrosion sheet is embedded in the mortar layer and the anticorrosion sheet is firmly fixed, peeling of the anticorrosion sheet does not occur due to pressure of permeated water or vapor pressure. Also, since the ends of the anticorrosion sheet are firmly and watertightly joined by resin welding, the joint may crack due to the pressure of the permeated water or the vapor pressure, or the chemical liquid may leak from the joint. Nor. Therefore, the floor surface of the anticorrosion sheet constructed by the method of the present invention can exhibit an excellent anticorrosion effect for a long period of time.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

According to the construction method of the present invention, first, as shown in FIG. 1, a concrete floor 1 is formed. This floor material 1 is formed by placing concrete at a height h obtained by subtracting the thickness T of the precast plate from the final height H of the floor surface in advance, troweling the surface, curing and curing. To do.

Next, the surface of the floor 1 is cleaned, and an adhesive or mortar 2 is applied to the surface of the floor 1 as shown in FIG. A two-liquid mixed type adhesive such as an epoxy resin or a polyester resin is preferably used as the adhesive, and a polymer cement mortar containing a polymer dispersion or latex is preferably used as the mortar.

When the application of the adhesive or mortar 2 is finished,
As shown in FIG. 3, the precast plates 3 are laid and arranged. This laying and laying operation needs to be performed promptly within the pot life of the adhesive or the mortar 2 in order to surely adhere the precast plate 3 to the floor 1. Then, the non-shrinkable mortar (not shown) is filled in the space between the laid-out precast plates 3. If the voids are small, epoxy resin or the like may be filled.

As shown in FIG. 5, the precast plate 3 has an anticorrosion sheet 3a fixed to the surface of a mortar layer 3b, and a reinforcing material 3c such as a reinforcing bar or a welded wire mesh is embedded in the mortar layer 3b. ing. The anticorrosion sheet 3a has corrosion resistance,
It is made by molding a synthetic resin having good chemical resistance such as polyvinyl chloride, polypropylene and polyethylene. As shown in FIG. 5, a large number of anchors 30a are provided on the back surface of the seat, and each anchor 30a is As shown in FIG. 7, it has a shape in which a pair of projecting pieces 31a, 31a inclined in directions away from each other are connected by an intermediate connecting piece 32a. And
By embedding the anchor 30a in the mortar layer 3b so as not to slip out, the anticorrosive sheet 3a is attached to the mortar layer 3b.
It is firmly fixed to the surface of b.

As shown in FIG. 6, the precast plate 3 having such a structure has an anchor 30a facing upward, and an anticorrosion sheet 3a is laid inside the formwork 5, and the above-mentioned reinforcing material 3c is placed thereon.
It can be easily manufactured by placing and placing the mortar 3b. As the mortar 3b, high strength mortar such as ordinary cement mortar, polymer cement mortar or polymer mortar is preferably used. The thinner the thickness T of the precast plate 3 to be manufactured, the easier it is to handle, but if it is too thin, it may crack, so it is desirable to set it to about 20 mm, and the surface anticorrosion sheet 3a.
It is appropriate that the thickness t is about 3 to 5 mm.

The anchor 3 on the back surface of the anticorrosion sheet 3a
The shape of 0a is not limited to the illustrated shape, and may be a shape such as a T-shaped cross section, an arrow shape, a mushroom shape, or the like in which the tip is swollen and does not come out from the mortar layer 3b. Further, as shown in FIG. 7, it is not always necessary to disperse the anchors 30a in a zigzag manner and to project the anchors 30a. For example, rib-like continuous anchors may be provided in parallel at regular intervals.

When the laying of the precast plate 3 is completed, as shown in FIG. 4, the ends of the anticorrosion sheets 3a of the adjacent precast plates 3 are welded with the resin 4 to join them watertightly,
Further, the anticorrosion sheet 3a of the precast plate 3 around the floor surface and the anticorrosion sheet of the wall surface are similarly resin-welded. It is desirable to perform this resin welding using a polypropylene resin rod or a high-density polyethylene resin rod of the same type as the anticorrosion sheet 3a,
In addition, prior to welding, the joints should be cleaned and the anticorrosion sheet 3
It is desirable to expose the new end surface by scraping off the end surface of a with a knife or the like. When such pretreatment is performed, welding defects are eliminated, and joint strength and watertightness are significantly improved.

When the floor surface of the anticorrosion sheet is constructed by the above method, the troublesome work of adhering the anticorrosion sheet after the laying of the precast plate as in the conventional case is completely unnecessary, and the edge of the anticorrosion sheet 3a on the surface of the adjacent precast plate 3 is eliminated. Since it is only necessary to weld the parts with resin, the construction period will not be prolonged.
Moreover, since the precast plate 3 to be laid is the one in which the anchor 30a on the back surface of the anticorrosion sheet is firmly fixed to the mortar layer 3b, the anticorrosion sheet 3a is firmly fixed. Does not cause peeling of the anticorrosion sheet 3a, and since the ends of the anticorrosion sheet 3a are firmly and watertightly joined by resin welding, this joint portion causes cracks due to pressure of permeated water or vapor pressure. Also, there is no leakage of chemicals from the joint. Therefore, the floor surface of the anticorrosion sheet constructed by the method of the present invention exhibits an excellent anticorrosion effect for a long period of time.

[0020]

As is apparent from the above description, according to the present invention, since the troublesome work of laying out the precast plates and adhering the anticorrosion sheet is not required, the construction period is not prolonged and the floor is Peeling of the precast plate due to the pressure of water and vapor pressure that penetrates from the concrete in the ground,
Since the peeling of the anticorrosion sheet on the surface and the cracking of the joint portion do not occur, it is possible to construct an anticorrosion sheet floor surface that can exhibit an excellent anticorrosion effect for a long period of time.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a state where a floor is formed by placing concrete.

FIG. 2 is a partial cross-sectional view showing a state in which an adhesive or mortar is applied on the floor material.

FIG. 3 is a partial cross-sectional view showing a precast plate laid and arranged on a floor material coated with an adhesive or mortar.

FIG. 4 is a partial cross-sectional view showing resin-welded end portions of anticorrosion sheets on the surfaces of adjacent precast plates.

FIG. 5 is a sectional view showing an embodiment of the precast plate of the present invention.

FIG. 6 is a cross-sectional view illustrating the method of manufacturing the same precast plate.

FIG. 7 is a partially enlarged perspective view of an anticorrosion sheet adhered to the surface of the precast plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor material 2 Adhesive or mortar 3 Precast board 3a Anticorrosion sheet 30a Anchor 3b Mortar layer 3c Reinforcing material 4 Welding resin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenichi Hotta 2-3-3 Azuchicho, Chuo-ku, Osaka Takiron Co., Ltd.

Claims (2)

[Claims] 1. A mortar precast plate having a concrete resin cast on a surface thereof after applying concrete to form a floor and then applying an adhesive or mortar to the surface of the mortar. A method for constructing a floor surface of an anticorrosion sheet, which comprises laying them out within a pot life of mortar and resin-welding the ends of the anticorrosion sheets of adjacent precast plates. 2. A precast plate obtained by embedding a large number of anchors protruding from the back surface of a synthetic resin anticorrosion sheet in a mortar layer containing a reinforcing material, and fixing the anticorrosion sheet to the surface of the mortar layer.