JPH065458Y2 - Construction base material that does not require makeup mortar construction on site - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a building base material which does not require makeup mortar construction on site with excellent fire protection performance, onto which a spray coating material can be directly applied.

(Prior Art and Purpose and Structure of the Present Invention) A large number of base materials to be nailed in advance to apply makeup mortar onto a base structure have already been proposed. In addition, such a conventional base material has succeeded in significantly shortening the construction period in that the makeup mortar can be directly applied onto the base material without performing a base treatment such as lath mesh. However, it is conceivable that if the process of applying cosmetic mortar one step further is removed from the on-site construction, the construction period can be further shortened.

However, if such a building base material is to be made, the decorative mortar must be pre-laminated on the base material, resulting in a significant increase in weight and a problem with the strength of the base material. Will.

Based on the above findings, the present invention provides a lightweight cement layer 4 corresponding to a decorative mortar layer in advance on the base material as described in detail below, and the strength thereof is reinforced by the net-like material 5 to reduce the weight. In addition, the present invention aims to provide a base material for construction that has sufficient strength and is extremely easy to construct on site.

(Description of Embodiments) Hereinafter, embodiments of the present invention will be described.

In the drawing, reference numeral 1 denotes a substrate, which is a plate-like body made of an inorganic or organic or inorganic-organic mixed plate or a composite plate such as plywood fiber board, wood shaving board, gypsum board, cement board, wood piece cement board, calcium silicate board, etc. .

Next, the surface of the substrate 1 is coated with a synthetic resin, latex, or a bituminous substance or an emulsion thereof uniformly with a coating device such as a roll coater or a flow coater and dried to form a waterproof coating layer (2).

The synthetic resin used for the waterproof coating layer 2 is vinyl acetate, vinyl chloride resin, acrylic resin, epoxy resin, etc., and the latex is acrylonitrile butadiene rubber (NBR), butadiene acrylo rubber (MBR), styrene butadiene rubber (SBR). ) And the like, and tar and asphalt are used as the bituminous substance. If necessary, an additive such as clay, talc, calcium carbonate, or an auxiliary agent such as a dispersant may be added to and mixed with the waterproof coating layer 2.

When the surface of the substrate 1 is a porous plate-like body, the waterproof coating layer 2 is
The surface of the substrate is made smooth to prevent the permeation of water from the surface (improve the waterproof performance) and prevent the warp and decay of the substrate itself due to the hygroscopic expansion due to the permeated water.

The waterproof coating layer 2 prevents the elution of water or an alkali-soluble component (abrasion) depending on the material of the substrate 1 and eliminates the delay of curing or the inhibition of curing due to the drilling of the lightweight cement applied thereon. Also do.

When the surface is porous by making the surface smooth by the waterproof coating layer 2, voids (air pockets) in the surface recesses are eliminated, the generation of air bubbles is prevented, and the lightweight cement layer 3 and the substrate to be applied thereon are prevented. The adhesive area with 1 will be substantially increased.

Therefore, the close contact between them is complete.

Next, a mixture of cement, lightweight aggregate and water is applied on the waterproof coating layer 2 in layers using a coating device such as a roll coater or a spraying device such as a former to form the lightweight cement layer 3. If necessary, a synthetic resin, latex, or a bituminous substance similar to that constituting the waterproof coating layer 2 may be selected and added to the lightweight cement layer 3.

As the cement, any one of ordinary cement, early-strength cement, ultra-early-strength cement, moderate heat cement, alumina cement, blast furnace cement, fly ash cement, silica cement, and rapid hardening cement may be used.

The lightweight aggregate is selected from leucite, perlite, expansive rock, expansive clay, shirasu balloon or polyethylene, synthetic resin foam beads such as polysterene, crushed granules of synthetic resin foam, etc., each of which is used alone. Alternatively, they are appropriately mixed and used.

Next, after the lightweight cement layer is formed, the net-like material 4 is immediately placed on the surface of the surface without curing and curing, and the cement is further dispersed in a thin layer to form the surface cement dispersion layer 5.

As the net-like material 4, one made of ginseng, carbon fiber, glass fiber, alkali-resistant glass fiber or synthetic fiber such as vinylon, nylon, or metallic material such as wire mesh and lath mesh is used.

The cement sprayed on the surface absorbs the water in the lightweight cement layer and hydrates it to fix the net-like material 4.

In this way, the net-like material fixed in a sandwich will have its surface coated with cement,
The net-like material itself becomes tougher and adds strength. For this reason, the reinforcing effect on the lightweight cement layer by this net-like material is very high.

The laminate thus obtained is subjected to natural curing or steam curing while or after being compressed as necessary to cure the lightweight cement layer 3 and the surface cement dispersion layer 5 to obtain the building base material of the present invention. obtain.

(Effects and effects of the present invention) The base material of the present invention is fixed to the base structural material and then immediately sprayed to complete the outer wall construction, so that conventional makeup mortar construction can be omitted. Therefore, the construction period can be significantly shortened.

Further, since the lightweight cement layer 3 is used in advance as the one corresponding to the decorative mortar layer, the layer originally corresponding to the decorative mortar layer is laminated in advance, so that the weight of the base plate which should be heavy is made as light as possible. I was able to.

Furthermore, the presence of the lightweight cement layer 3 significantly improves the fireproof performance.

Water absorption on the substrate 1 is completely prevented by the waterproof coating layer 2 on the surface, the substrate 1 itself does not warp or dance due to water absorption, and the amount of water at the interface of the lightweight cement layer 3 decreases. There is no occurrence of cracks in the layer 3.

The present invention is equivalent to a decorative mortar layer, and a net-like material is placed on a lightweight cement layer, and a surface cement dispersion layer formed by spraying cement is further formed thereon to form a lightweight cement layer and a net-like material. , The surface cement dispersion layer is cured integrally.

Therefore, the net-like material that the lightweight cement layer has on the surface is
The cement sprayed on the surface of the net-like material absorbs the water in the cement layer located below the net-like material and hydrates, so that the cement is reliably fixed to the surface of the cement-like material. Therefore, the brittleness of the surface of the cement layer having a thickness can be eliminated, and the strength of the cement layer can be maintained and improved.
At the same time, the surface of the net-like material itself is surely coated with cement, so that further reinforcement can be exhibited. Further, the water penetrated into the net-like material during the spraying work, and a stronger adhesion of the net-like material to the cement layer spraying material was obtained.

As described above, a thick-painted decorative mortar layer can be safely formed on the substrate in advance for reinforcement by a lightweight yet firm net-like object, and at the construction site, only finishing as necessary is required. As a result, it has become possible to achieve a marked reduction in construction period compared to conventional base materials for construction.

[Brief description of drawings]

 The drawing is a sectional view of the base material of the present invention. 1 ... Substrate, 2 ... Waterproof coating layer, 3 ... Light weight cement layer, 4 ... Net-like material, 5 ... Surface cement dispersion layer.

Claims (1)

[Scope of utility model registration request] 1. A waterproof coating layer 2 made of synthetic resin, latex or a bituminous substance is formed on the surface of a substrate 1, and a lightweight cement layer 3 made of a mixture of cement and lightweight aggregate is formed on the waterproof coating layer 2. The net-like material 4 is placed on the lightweight cement layer 3, and the surface cement dispersion layer 5 formed by spraying cement is further formed on the lightweight cement layer 3, the lightweight cement layer 3, the net-like material 4, and the surface cement dispersion layer. No. 5 is an integral hardening material that does not require makeup mortar construction on site.