JPH0214859A - Building material and production thereof - Google Patents

Abstract

PURPOSE:To improve the strength of a building material and the workability in the production of the material by adding sepiolite fiber and reinforcing fiber to slag and gypsum at specific weight ratios and using the mixture as a building material. CONSTITUTION:100 pts.wt. of slag and gypsum are mixed with 1-3 pts.wt. of slaked lime, 5-10 pts.wt. of light aggregate, 1-13 pts.wt. of pulp, 1-10 pts.wt. of sepiolite fiber and 0.5-3 pts.wt. of reinforcing fiber composed of synthetic fiber, etc., and the mixture is mixed with water to form an aqueous slorry. A sheet is formed from the slurry by paper-making method, extrusion forming or casting and the sheet is cured and hardened to obtain a building material. Since the sepiolite fiber has large specific surface area, i.e. sufficient void, the particle-collecting performance in water and the water-absorptivity can be improved. The strength of the building material and the workability in the production of the material are improved by the reinforcing fiber existing in the material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a building material, and more particularly to a building material made of an inorganic cured body containing sepiolite fibers and a process for producing the same.

[Conventional technology]

Conventionally, asbestos has been used as one of the solid components when manufacturing building materials such as inorganic building boards. For example, when manufacturing a building material (molded and cured material) using an aqueous slurry using a paper forming method, this asbestos has various physical properties such as fine particle fixation, water retention, dispersibility, drainage, and strength. It has the advantageous properties of improving workability and productivity, and imparting high mechanical strength to finished building materials.

[Problem to be solved by the invention]

However, it has become clear that asbestos is highly carcinogenic, leading to calls for so-called asbestos pollution.
As a result, there has been a strong demand for the development of building materials that do not use asbestos as a solid component.

Therefore, the object of the present invention is to achieve good physical properties such as workability during production without using asbestos as a solid component.
Moreover, it is an object of the present invention to provide a building material in which the hardened and manufactured building material has sufficient strength.

[Means to solve the problem]

As a result of various studies, the inventors of the present invention have achieved the above objective by blending sepiolite fibers and reinforcing fibers as solid components in place of asbestos in the main raw materials slag and gypsum, each within a specific range. I found out that this happens.

The present invention has been made based on the above findings, and is a building material made by molding and hardening an aqueous slurry containing slag, gypsum, slaked lime, lightweight aggregate, pulp, sepiolite fibers, and reinforcing fibers. Provided is a building material characterized by containing 1 to 10 parts by weight of sepiolite fibers and 0.5 to 3 parts by weight of reinforcing fibers per 100 parts by weight (including 30 to 80 ffl!it parts of slag). It is something to do.

The present invention also provides a method for producing the above-mentioned building material, in which 100 parts by weight of slag and gypsum (30 to 80 parts by weight of slag and 100 parts by weight of gypsum)
1 to 3 parts of slaked lime, 5 to 10 parts of lightweight aggregate, 1 to 13 parts by weight of pulp, 1 to 10 parts by weight of sepiolite fibers, and 0.5 to 0.5 parts of reinforcing fibers. A water-based slurry is made by blending each of the triple sliding parts, i+! , 1', and using the aqueous slurry, form a sheet (·-shaped molded body) by a paper molding method, an extrusion molding method, or a casting molding method,
The present invention provides a method for producing a building material, which is characterized in that the material is then cured and cured.

[Effect]

Although the effects of the present invention are not necessarily clear, it is understood that sepiolite fibers and reinforcing fibers primarily fulfill the functions of asbestos to improve workability during manufacturing and to improve the strength of building materials after manufacturing. The above-mentioned improvement in workability is mainly due to the fact that sepiolite fibers have a large specific surface area, that is, sufficient voids, and are highly effective against fine particles in water. It is understood that this is based on the characteristics that it has excellent scavenging performance, high water absorption, and excellent dispersibility in water.

Hereinafter, the building material of the present invention will be described in detail together with embodiments of its manufacturing method.

The building material of the present invention is made by molding an aqueous slurry containing slag, gypsum, slaked lime, lightweight aggregate, pulp, sepiolite fibers, and reinforcing fibers into a predetermined shape and hardening it.

In the above building material, 1 to 10 parts by weight of sepiolite fibers, preferably 2 parts by weight, per 100 parts by weight of slag and plaster.
It is contained in an amount of 7 parts by weight, more preferably 3 to 6 parts by weight.

This sepiolite fiber is not particularly limited, but its diameter is 0.01 to 1 μm, preferably 0.10 to 0.70 μm.
m, and its length is from 0.1 to 50 μm, preferably from 20 to 50 μm. In addition, when using the above-mentioned sepiolite fibers, by crushing the sepiolite fibers in advance with, for example, a shear crusher, it is possible to improve the ability to collect fine particles in water, and also to improve the ability to collect fine particles in the manufactured building materials. Water retention can be improved.

In addition, the above building material contains reinforcing fibers in an amount of 0.5 to 3 parts, preferably 1 part by weight, per 100 parts by weight of slag and plaster.
It is contained in an amount of 1 to 2.5 parts by weight, more preferably 1 to 2.5 parts by weight. Examples of this reinforcing fiber include fibers made of synthetic resins such as vinylon, polypropylene, polyester, acrylic, and rayon, carbon fibers, and glass fibers, and these can be used alone or in combination. The above may be used in combination. In addition, these reinforcing fibers include
It is preferable that the diameter is 3 to 20 μm, and 3 to 14 μm.
It is more preferable that the length is 3 to 1 μm.
201I1m is preferable, and 3 to 1211II
More preferably, it is 11.

In addition, in the present invention, the breakdown of the above 100 parts by weight of slag and plaster is that the slag is 30 to 80 parts by weight, 9 parts or 55 to 65 parts by weight, and more preferably 40 to 50 parts by weight. It is included.

In the building material of the present invention, the following other solid components are also used in combination.

III et al., 1 to 3 parts by weight of slaked lime, preferably 2 to 2 parts by weight.
5 parts of heavy oil, 5 to 1 parts by weight of light oil aggregate (1 part by weight, preferably 7 or 5 to 7 parts by weight), and 1 to 13 parts by weight of pulp, preferably 4 to 1 mffi parts of the slag and Used for the most part of the 100-layer stone straightener.

For the above-mentioned pulp, 2 to 4 parts by weight of non-flammable pulp and 9 to 12 parts by weight of semi-non-flammable pulp is preferred. Further, examples of the lightweight aggregate include perlite and balloons, and as the pulp, those commonly used as raw materials can be used without restriction.

In the present invention as described above, by using sepiolite fibers and reinforcing fibers together in the above-mentioned amount ranges, it is possible to impart water retention and drainage properties that are equivalent to or even better than when asbestos is used. At the same time, workability and productivity can be improved, and performance such as strength can also be improved.

Next, a method for manufacturing the above-mentioned building material will be explained.

First, 100 layers of slag and plaster (30 to 8 pieces of slag
(including 0 parts by weight), according to the blending amount as described in i;■,
An aqueous slurry is prepared by blending slaked lime, light oil aggregate, pulp, sepiolite fibers, and reinforcing fibers.

In preparing the above aqueous slurry, first, the pulp is wet-beaten or dry-beaten, and then the other individual components are sequentially blended and thoroughly mixed with a predetermined amount of water. In addition, the content of total solid components in the aqueous slurry is
In order to work efficiently with the paper forming method explained in ■,
It is preferable that it is 2-15% of heavy crushing, and 4-10uj:
It is more preferable that the content is % by weight, and in order to work efficiently with the extrusion molding method or the casting method, it is preferable to make the content higher than that in the paper forming method described in Section 2. In addition, in the above-mentioned forming method, there are two types of paper forming method: circular net method and Fourdrinier method, and in both cases, the thickness of the molded product is 41 volumes or more.
It is suitable for application when the thickness is 15 mm, and both the extrusion molding method and the casting method have a thickness of l 0iui=
This is suitable for application to a case of 15 cm.

Next, using the aqueous slurry, a sheet-like molded product is formed by a paper molding method, an extrusion molding method, or a casting method, and then the product is cured and cured to produce a building material. Incidentally, examples of the second method of biocuring include the natural curing method and the above-mentioned curing method.

When producing building materials as described above, the ability to collect fine particles in one cup of water is improved, and the drainage of the aqueous slurry during molding is improved, resulting in improved workability and production. This can greatly improve your gender. In addition, the manufactured construction+A material has improved water retention, improved interlaminar strength, prevents delamination and cracking, and has improved bending strength and tensile strength, as well as improved dimensional stability. achieved. Therefore, the building material of the present invention is suitable as an interior/exterior material for buildings.

The solid components capable of IJ used in the present invention include 1
It goes without saying that the solid components are not limited to the solid components described in 11 above, and that commonly used raw materials, such as cement caps, may be used in combination.

〔Example〕

Next, the present invention will be described in more detail with reference to Examples.

Example 1, Example 2, Comparative Example 1 listed in Table 1 below
For each of Comparative Example 2, an aqueous slurry was prepared by blending each solid component in the amount (parts by weight) shown in the same table,
Each 910nuIIX1810 ++ua X 5
+am sheet-like molded product was created, and then cured by natural curing method for 21 days to create a molded and cured product,
Various measurement tests to be described later were conducted on these molded and cured bodies (building materials), and the results are also listed in Table 1. In order to produce each of the above-mentioned molded bodies, an aqueous slurry having a solid component content of 4% by weight was prepared, and the Kuajiro papermaking method was applied to the aqueous slurry.

In addition, the raw materials listed in Table 1 are specifically as follows.

■Slag: Made by Nippon Steel (product name: X; U))■
Plaster Two people made by Showa Paper ■ Slaked lime: Made by Okutama Kogyo ■ Perlite; Made by Daikalide Orient 0 Chrysanthemum (Product name: Daicalite) ■ Made by Parbou Mitsubishi Paper ■ (Product name: [, -B K r'
) ■ Sepiolite; Rinjin original: Union Kasei ■ (Product name: Cerabola) ■ Alkali-resistant glass fiber: Made by Nippon Denki Glass ■ (Product name:
AC3) ■Asbestos fiber; Manufactured by Kakiuchi Shoji ■ (trade name: Near f11ite) Measurement test (]) Bulk specific gravity (JIS A5429) After drying a 10cm square test piece at 60°C for 24 hours, its weight! (W.O.
) and the volume (VO) (Wo/Vo).

(2) Water absorption rate (%) (JIS A5429) 10cm
Soak the square test piece in 20°C clean water for 24 hours (W,) and dry it at 60°C for 24 hours (WO)L, W2-Wo
/Wo is calculated.

(3) Dimensional change rate (%) (JIS A3429) The test piece was dried at 60°C for 24 hours, and the distance between the gauge lines was 140 m.
/m, and measure with a converter (N
, ) L, then soaked in 20°C clean water for 24 hours and measured again (F, 2) L,! , -P/1. Calculated by

(4) Bending strength (kg/cJ) (JIS A1408
) This is done by measuring the maximum load at the time of bending failure for the No. 3 test specimen.

(5) Interlaminar strength (kg/cIIl) (JAS
(Japanese Agricultural Standards) Planar Tensile Test] 2t: Apply adhesive to the surface of a m-square test specimen, fix it to a chuck and pull it up and down in a vertical position, and measure the maximum load at Ml + separation or breakage. and do it.

(6) Pass the fire retardant I ¥ (JIS Al321) base material test and surface test.

The numbers in the table are the grades of flame retardant performance that passed.

Table 1 From Table 1 above, it is clear that the building material (molded cured product) of the present invention does not contain asbestos and has sufficient properties as a building material.

〔Effect of the invention〕

Although the building material of the present invention does not contain asbestos as a solid component, it has good workability during manufacturing and has sufficient strength etc. as a manufactured building material, similar to when asbestos is used. It has good physical properties and good productivity.

Claims (3)

[Claims] (1) A building material made by molding and curing an aqueous slurry containing slag, gypsum, slaked lime, lightweight aggregate, pulp, sepiolite fibers, and reinforcing fibers, the slag and gypsum 1
00 parts by weight (including 30 to 80 parts by weight of slag), 1 to 10 parts by weight of sepiolite fibers and 0.0 parts by weight of reinforcing fibers.
A building material characterized by containing 5 to 3 parts by weight. (2) The sepiolite fiber has a diameter of 0.01 to 1 μm,
The building material according to claim 1, which has a length of 0.1 to 50 μm. (3) 100 parts by weight of slag and plaster (30 to 8 parts by weight of slag)
(including 0 parts by weight), 1 to 3 parts by weight of slaked lime, 5 to 10 parts by weight of lightweight aggregate, 1 to 13 parts by weight of pulp, 1 to 10 parts by weight of sepiolite fiber, and 0.5 to 3 parts by weight of reinforcing fiber. A building material characterized in that an aqueous slurry is prepared by blending each of Production method.