JPS61201650A - Glass fiber reinforced resin concrete - 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 (Field of Industrial Application) The present invention relates to glass fiber reinforced resin concrete used as floating floor panels for OA floors.

(Prior art) Generally, floating floor panels such as this type of OA floor are G, R, C
It is molded using (glass fiber reinforced concrete).

By the way, G, R, and C are cement and crushed stone.

Although it is manufactured by mixing glass mu and molding it by casting, it has the following problems.

(1) Since it is a casting method, dimensional accuracy is poor and surface polishing is required as post-processing.

(2) Since cement is alkaline, alkali-resistant glass fiber must be used, which increases costs.

(3) Since cement is a binder, it takes about one month to cure and cannot be obtained in a short period of time.

(Problems to be Solved by the Invention) The problems to be solved by the present invention are that the first invention is stronger than conventional G, R, and C, is inexpensive, and does not require post-processing; Our goal is to provide a new type of glass fiber reinforced resin concrete that can be formed in a short period of time.
In addition to the first invention, an object of the invention is to provide a new glass fiber reinforced resin concrete which has further increased strength and excellent flexural modulus.

(Means for solving the problem) The technical means taken to solve the above problem are as follows: In the first invention, unsaturated polyester resin 10 to 1
5% by weight of crushed stone, 60% to 80% by weight of crushed stone, 5% to 5% by weight of silica sand, 5% to 20% by weight of calcium carbonate, and 0% to 5% by weight of Garamechi 3fufu are mixed, and this is press-molded.

In the second invention, unsaturated polyester resin 10 to 1
5% by weight of crushed stone, 60-80% by weight of crushed stone, 0-5% by weight of silica sand, 5-20% by weight of calcium carbonate, and 0-5% by weight of glass chop, which was then press-molded by laying cloth-like glass IN on the bottom surface. It is something to do.

(Example) In the first invention, the amount of unsaturated polyester resin added must be 10 to 15% by weight. When the amount of unsaturated polyester added increases, the amount of other additives (silica sand, glass chop, calcium carbonate) added must be reduced, so the excess resin adsorbed by these additives is removed from the mold during press molding. Not only is it wasteful as it flows out, but the resin content is filled excessively, weakening the strength.If the amount added is reduced, the amount of silica sand, glass chop, and calcium carbonate added will inevitably increase, so the function as a binder will be weakened. It forms a void inside and falls to its knees.

Further, crushed stone cannot exceed the addition range of 60 to 80% by weight. In other words, as the amount added increases, the resin content decreases relatively, so the function as a binder becomes diluted, creating cavities that affect strength.If the amount decreases below the specified level, the resin content will be absorbed many times. Silica sand, glass chop.

Since it is necessary to increase the amount of calcium carbonate, it is necessary to increase the amount of resin, which not only increases the cost but also weakens the strength due to the decrease in crushed stone.

Furthermore, the amount of calcium carbonate added is limited to 5 to 20% by weight. Since this calcium carbonate has the function of regulating resin flow and imparting viscosity, it is not desirable in terms of properties if the amount exceeds or decreases with respect to the amount of resin added.

Then, 0 to 5% by weight of silica sand and O to 5% by weight of glass chop are added to the unsaturated polyester resin, crushed stone, and calcium carbonate set under such conditions, and mixed.

In a mixed state, the material for pressing becomes, for example, a hardened mortar-like material.

This pressing material was hot pressed (140°C).

50 ka/cwf) L, the glass fiber reinforced resin concrete of the present invention is obtained.

The second invention further improves the bending elastic modulus while having the same or higher bending strength than the first invention.

This second invention has a structure in which the glass fiber reinforced resin concrete of the first invention is lined with cloth-like glass fiber such as roving cloth. In this case, after laying the cloth-like glass fibers in a press mold, the press material is filled and heated and pressurized.

Incidentally, in both the first and second inventions, the amount of glass chop and silica sand added is limited to 0 to 5% by weight.

As for glass chop, the strength increases if the amount added is increased, but it is not economical due to the increased amount of resin.
If the addition amount of silica sand exceeds the range, it is not preferable because it becomes necessary to increase the amount of resin, resulting in a decrease in the amount of crushed stone added and a decrease in strength.

Next, in order to enhance the understanding of the present invention, experimental examples will be explained with reference to the attached table.

[Experimental example of the first invention] Bending strength 9 of G, R, C and glass fiber reinforced resin concrete formed by varying the amounts of unsaturated polyester resin, crushed stone, calcium carbonate, silica sand, and glass chop The elastic modulus was measured experimentally and the results are shown in Attached Table 1.

According to this, the bending strength of all examples is increased compared to G, R, and C. In particular, when silica sand and glass chop are used together, the bending strength is further improved by more than twice, and G, R, and C Approximately 1/2 the thickness is sufficient to obtain the same strength as
It has been proven that weight can be reduced.

[Experimental example of the second invention] Bending of conventional G, R, C with glass fiber reinforced resin concrete formed by changing the additive amount and lining with cloth-like glass fiber for each example as shown in Attached Table 1 The zero strength flexural modulus was measured experimentally and is shown in Attached Table 2.

According to this, the bending strength increased significantly in all examples, and when silica sand, glass chop, and cloth-like glass fiber were used together, G
The bending strength is about 3.5 times higher than that of G, R, and C, and even when glass chop and cloth-like glass fiber are used together, G, R
It was also proven that the bending strength is more than three times greater than that of G, R, and C, and that a thickness of approximately 1/3 is sufficient to maintain the same strength as G, R, and C, and that the weight can be reduced to more than 1/3. Experimental results showed that the bending modulus was also significantly higher than that of G, R, and C.

(Effect of the invention) Since the present invention is constructed as described above, it has the following advantages.

- In the first invention, there is no need to use alkali-resistant glass fibers, the structure is low, no post-processing is required, and productivity is high as it can be formed with a short tI11ti, and moreover, it is more productive than the conventional G.

It is possible to provide glass fiber reinforced resin concrete having physical properties such as stronger bending strength than R and C.

■ In addition to the advantages of the first invention, the second invention not only has stronger bending strength, but also has a high bending elastic modulus, and when used in floating floor panels such as OA floors, has excellent strength and resistance to being stepped on. It is possible to provide glass fiber reinforced resin concrete with very good resilience.

Claims (2)

[Claims] (1) Mix 10 to 15% by weight of unsaturated polyester resin, 60 to 80% by weight of crushed stone, 0 to 5% by weight of silica sand, 5 to 20% by weight of calcium carbonate, and 0 to 5% by weight of glass chop, and press-form the mixture. Glass fiber reinforced resin concrete. (2) 10-15% by weight of unsaturated polyester resin, 60-80% by weight of crushed stone, 0-5% by weight of silica sand, 5-20% by weight of calcium carbonate, 0-5% by weight of glass chops.
Glass fiber-reinforced resin concrete is made by mixing the above materials and press-forming the mixture by laying cloth-like glass fibers on the bottom surface.