JPS5832046A - Composition for inorganic formation - 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 The present invention relates to an inorganic molding composition useful for unfired pottery, building board materials, and the like.

So-called Portland cement is a mixture of so-called clay, which contains clay minerals such as kaolinite and halloysite, and has adhesiveness and plasticity, and calcium silicate clinker, which has hydraulic properties, and stone wax, blast furnace slag, fly ashes, silica, etc. When mixed with water and cured by adding water, the material has only low strength after about 7 days of age, but becomes high in strength after about 2 weeks of age, and a cured product resembling pottery is obtained. .

In the present invention, when producing the above-mentioned clay-Bol1-Land cement-based hardened body in vinegar, the clay is dispersed in water in advance (1) to form a clay slurry, which is sufficiently aged to modify the clay. to increase the stickiness and plasticity of clay so that it can be molded beautifully, and clay and portland cement 1-
This was devised for the purpose of facilitating the progression of the curing reaction.

Adding water to clay and leaving it for seven days or months increases its stickiness and plasticity. In potter's wheel molding, this washing creates a clay that does not stick to the hands and is easy to mold with good stretch, and in extrusion molding, it becomes a clay that can be molded homogeneously without cracking.

When clay is dissolved into mud, water glass is added to further increase its stickiness and plasticity, and the clay mud has excellent stringiness and viscoelasticity. Also, by adding alkali-containing ores such as feldspar, pottery stone, or aprid to the clay slurry, the stickiness and plasticity of the clay increases, as well as the stringiness of the clay slurry, in the same way as adding water glass. Rheological properties such as elasticity and viscoelasticity are improved.

(2) By mixing and hardening Portland cement I with clay that is highly resistant to stringiness and viscoelasticity, it is possible to create excellent properties that cannot be obtained by mixing powdered clay with Portland cement and water and hardening it. It becomes a hardened body. When Portland cement is mixed with clay mud, which has excellent stringiness and viscoelasticity,
Although its stringiness is almost completely lost, it still has excellent adhesiveness, plasticity, and viscoelasticity.

When Pol 1-land cement is mixed with clay slurry to which water glass, that is, an aqueous alkali silicate solution has been added, the presence of silicic acid sol is recognized in the hardening reaction due to the mutual reaction between the silicic acid sol in the clay slurry and Portland cement. At the same time,
The appearance of the cured product also changes slightly.

If you mix Portland cement with clay slurry added with sodium phosphate, will it turn into clay slurry? The effect of the phosphoric acid inside is harsh.

If a clay slurry to which sodium chloride is added is used, the initial strength of the hardened product will be increased.

If you use a clay mud boat to which acetic acid has been added, normal curing (
3) Ordinary Portland cement 1 as Portland cement
- Instead, if you use early-strength Portland cement 1-, medium-heat Portland cement, white Portland cement 1~, blast furnace cement, fly ashcocement, silica cement, etc., a considerably different effect will be exhibited. For example, if white Portland cement is used, a hardened product with a color similar to that of pottery can be obtained, and its properties such as hardness, strength, and structure are similar to that of a cement, making it easy to enjoy unfired ceramics. You can get a great effect.

A hardened body made by mixing clay weight capacity and Portland cement is superior to a hardened body made by adding water to powdered clay and Portland cement.

The specific reason for this improvement is not clear, but it is believed that it is due to the sufficient dispersion of clay in water, the change in adsorbed ions of clay in water, the formation of hydrated fine silicates, etc. Conceivable. Due to the metamorphosis of such clay, it becomes excellent in the regularity of the particle arrangement as a mixture with Portland cement, and the active silicic acid sol (
4) It is thought that it reacts with Portland cement early in its formation and forms an excellent hardened product.

Next, examples will be shown.

(Example 1) Clay mud 2, which had been boiled for about a week, was made of Joshua kaolin J (:) wt% and water 3Qwt%, and cement mud was made of white Portland cement 7Qwt% and water 3QwL%, /:7 They were mixed in a weight ratio and cured as they were to obtain a cured product with excellent high strength.

(Example 2) Hoba consisting of 3Qwt% of Joshia kaolin, water glass No. 7 (sodium silicate), 20wt%, and 3Qwt% of water/
Weekly aged clay mud f and white portland cement 7
Cement slurry consisting of Qwt% and water 3Qwt%, /:
A cured product with a stone-like surface was obtained by mixing at a weight ratio of 7 and curing the mixture as it was.

(Example 3) Clay mud made by adding 3 wt% of table salt to Joshia kaolin 3Qvr, t%, water 3Qwt% and leaving it for about a week, and white boll (5) From Rutland cement 7Qwt%, water 3Qwt% Cement mud T was mixed at a weight ratio of /:7 and cured as it was to obtain a cured product with good initial strength.

(Example 4) Joshia Kaolin 5 (:lvt%・Water tI5wt%・
Vinegar (non-histose vinegar) 5wt% clay clay slurry aged for about a week, white Portland cement 70wt%, water j'Owt
% cement slurry) was mixed at a weight ratio of /:7.
After daily routine training! A hardened product with high strength was obtained by curing in water for one day.

As described above, the present invention is characterized by mixing clay clay and Portland cement, and has the effect of producing a beautiful and high-strength hardened body.

Patent applicant: Yoi 1) Satoru Kiyoshi (6)

Claims (1)

[Claims] An inorganic molding composition characterized by mixing clay slurry and Portland cement.