JPH037365Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to glass fiber concrete products and belongs to the field of manufacturing and other handling of concrete products.

(Prior Art) Concrete products containing glass fibers, metal filaments or carbon fibers have been known in the past.

(Problem to be solved by the invention) Even though the surface treatment of conventionally used glass fibers, metal filaments, or carbon fibers has been considered, curly hair has not been taken into account, so they are often However, there was a problem that the adhesion force was low and crack prevention was not sufficient. In particular, minute cracks are often found on the tensile side of concrete products.
Improvements in this respect were also insufficient.

(Means for solving the problem) However, this invention increases the adhesion force between the concrete and the glass fiber by curling the strands made by twisting multiple glass fiber filaments or rovings into a rope shape. , it has achieved great effects in preventing cracks and has solved the problems of the prior art.

That is, this invention constructs a glass fiber concrete product by distributing and embedding a large number of glass fiber short fibers, which are formed by twisting a plurality of glass fiber filaments or rovings into rope-like strands, into the concrete wall thickness. . In the above, short glass fibers are more effective if they are buried close to the tensile side of the concrete product. The strand is constructed by twisting a plurality of rovings into a rope shape. Furthermore,
You can also apply adhesive to the outside to fix the shape. The short glass fiber fibers are bent into a coil spring shape or a broken line shape and fixed by heating, for example, to make them non-stretchable. Further, short glass fiber fibers can also be formed by curling glass fiber filaments or rovings.

The main body can be made of concrete, cement mortar, or synthetic resin.

(Function of the invention) According to this invention, the short glass fibers are curled and the short fibers are embedded in the concrete product, so that the adhesion between the glass fibers and the concrete (or cement mortar) is good. , even if some tensile force is applied to the concrete product, it will exhibit a corresponding resistance.

(Example) This invention will be explained with reference to the embodiment shown in FIG.

Bending the roving 2 made by bundling multiple (several to more than ten) glass fiber filaments 1 (for example, bending a roving 3 cm long to a width of 5 mm)
Then, by mixing this with cement mortar 3 (for example, about 10% (by weight)) and pouring it into a mold, a concrete plate 4 can be obtained.

Although the above embodiments have described short fibers obtained by processing rovings, it is also possible to process filaments or twist three rovings 2 into a rope shape (Fig. 3), and use strands 6 whose outer surfaces are coated with adhesive 5. You can also do it. In the case of the strand 6, since the outer wall has irregularities (knots), the required adhesion force can be obtained sufficiently even if the hair is not reprocessed.

Although the strand 6 is constructed by twisting three rovings 2 together, similar effects can be expected even if the strand 6a is constructed by twisting two rovings 2 together (FIG. 6).

(Effects of the invention) According to this invention, short fibers made of twisted glass fibers and curled fibers are embedded in the concrete product, so that the unevenness of the outer surface of the short fibers prevents adhesion to the concrete. This has the effect of increasing adhesion, increasing the strength of the concrete product, and preventing cracks that tend to occur on the tensile side of the product.

[Brief explanation of the drawing]

Figure 1 is a partial sectional view of an embodiment of this invention, Figure 2 is a partial sectional view of an embodiment of this invention.
The figure is a partially enlarged front view of the glass fiber strand used in this invention, Figure 3 is an enlarged cross-sectional view of a strand using three rovings, and Figure 4 is an enlarged front view of the same roving processed into a coil spring shape. , FIG. 5 is an enlarged front view of the rovings bent, and FIG. 6 is an enlarged cross-sectional view of the strand using two rovings. 1...Glass fiber filament, 2...
Roving, 3... Cement mortar, 4... Concrete product, 5... Adhesive, 6... Strand.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A large number of short glass fiber fibers made by curling a plurality of glass fiber filaments or rovings into a rope-like strand are inserted into the concrete wall, close to the tensile side of the concrete product. A glass fiber concrete product that is installed and buried in a dispersed manner. 2. The glass fiber concrete product according to claim 1, in which the short glass fibers are in the shape of a rope, coil spring, or convex-concave shape of a broken line.