JPS63548A - Light weight building material - 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] [Industrial application field] The present invention relates to concrete plates and other lightweight building materials.

[Prior art and its problems]

Lightweight building materials such as autoclave-cured aerated concrete use silica stone as the silicic acid raw material and finely crushed limestone as the calcareous raw material.Cement, slaked water, or fresh stone water is added as necessary, and foaming agents and It was kneaded with a foaming agent, molded into a predetermined shape, foamed, and then cured in an autoclave.

However, in the conventional aerated concrete mentioned above, the main materials, silicic acid raw material and calcareous raw material, are obtained by crushing silica stone and limestone, respectively, so special crushing equipment is required, which increases the production space and increases production space. Operating expenses were also required, leading to an increase in costs. Furthermore, light + M
In order to obtain a W product, a foaming agent was mixed in to form a large number of bubbles inside. This blowing agent is produced by a chemical reaction.

Since it is a mechanism that generates gas, the temperature of the raw material, air temperature, etc. affect the amount and shape of foaming, so detailed control is required. Therefore, it requires the skill of the operator and is not easy to manufacture. There was a problem.

By the way, the importance of coal as an energy alternative to oil is currently being reconsidered, and the construction of coal-fired power plants in Dayongjing is being promoted, and it is expected that a large amount of coal ash will be generated in the future. Since the treatment of coal ash generated in large quantities is a major problem, it is important to develop technology for its effective use.

The present invention was made in view of the above circumstances, and aims to provide a lightweight building material that can effectively utilize coal ash and does not require crushing equipment for the main material, such as silica stone, or a blowing agent. .

[Means/effects for solving the problems] The present invention is a lightweight building material made of coal ash granulated sand, which is formed by granulating a mixture of coal ash, cement, and water, as the main material, and a binder and water mixed therein. By molding into a predetermined shape and curing the molded product.

By utilizing the lightness of coal ash without mixing a blowing agent, we aim to reduce the weight, and since coal ash is originally spherical fine particles, there is no need for crushing equipment, making effective use of coal ash. This is what I did.

[Embodiments of the invention]

First, coal ash granulated sand is made by adding cement and water to coal ash and mixing and granulating it at high speed. Its size should be less than 5m in diameter. Coal ash contains approximately 60% silicon dioxide as a component and is glassy and approximately spherical in shape. Although the true specific gravity is 2.0 to 2.2, the bulk specific gravity is 0.8 to 1.0 because the content is white and has voids. When this is granulated as described above, new voids are formed between the coal ash particles, so the bulk specific gravity of the coal ash granulated sand is 0.5.
~0.7. A feature of the present invention is that the main material is coal ash granulated sand that has many voids and has a small bulk specific gravity. This coal ash granulated sand is mixed with a binder such as cement and water, and then formed into the shape of, for example, a concrete plate. Thereafter, this molded product is cured by steam curing, autoclave curing, or the like. Incidentally, coal ash itself may be further mixed in an appropriate amount. In this case, the degree of weight reduction will be somewhat reduced because the only voids will be those of the coal ash itself, but the weight will be reduced depending on the desired product. Since the degree of carbonization differs, the coal ash itself may be mixed in as appropriate.

Measurement results for specific examples are shown below. One case is steam curing, and the other is autoclave curing.

1. Steam curing [Effects of the invention] According to the present invention, a lightweight building material is mainly made of coal ash granulated sand, which is formed by granulating a mixture of coal ash, cement, and water, and a binder and water are mixed therein. It was formed by molding it into a predetermined shape and curing the molded product.

Coal ash can be used effectively. Since the lightweight nature of coal ash itself is used to reduce weight, there is no need for a conventional foaming agent, resulting in lower costs. Furthermore, since coal ash is originally spherical fine particles, there is no need for a pulverization process, and conventional pulverization equipment is not required.
It is possible to save space and reduce costs.

Claims (1)

[Claims] A lightweight building material characterized in that the main material is coal ash granulated sand, which is formed by granulating a mixture of coal ash, cement, and water, and is molded by mixing a binder and water, and the molded product is cured.