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Preparation method for pulverized coal-ash-based porous artificial stone

A technology of porous artificial stone and fly ash, applied in ceramic products, sustainable waste treatment, solid waste management, etc., can solve the problems of long steam curing time, high lime content, low strength, etc., to improve productivity and shorten The effect of steaming time and cost reduction

Inactive Publication Date: 2012-07-18
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current research results show that the currently prepared fly ash autoclaved aerated concrete blocks have high lime content, long steam curing time, low strength, generally lower than 5MPa, and cannot meet the load-bearing requirements

Method used

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  • Preparation method for pulverized coal-ash-based porous artificial stone
  • Preparation method for pulverized coal-ash-based porous artificial stone
  • Preparation method for pulverized coal-ash-based porous artificial stone

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Embodiment Construction

[0019] A preparation method of fly ash-based porous artificial stone, comprising the following steps:

[0020] The first step is to add calcium carbonate-containing material, calcium sulfate-containing material, silicon oxide-containing material, water, fiber and Portland cement to the fly ash, and stir to obtain the fly ash cement slurry; Table 1 Eight example formulation compositions numbered 1-8 are listed.

[0021] Second step, in the fly ash cement slurry of the first step, add alkali activator, metal aluminum powder, organic foaming agent, mix to obtain gas-containing fly ash cement slurry; Table 2 has listed different embodiments The amount of alkali activator, metal aluminum powder, and organic foaming agent added.

[0022] In the third step, the gas-containing fly ash cement slurry in the second step is poured into the mold, and the cement block or the cement slab is obtained by cutting through static curing; and then the fly ash-based porous artificial stone is obta...

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Abstract

The invention discloses a preparation method for a pulverized-coal-ash-based porous artificial stone. The preparation method is characterized in that the method comprises the steps of: adding materials containing calcium carbonate, calcium sulfate and silicon oxide, water, fibers and Portland cement into pulverized coal ash, evenly agitating, adding alkali-activator, metal aluminum powder and organic foaming agent, and evenly mixing; and statically curing, cutting into cement blocks or cement blank plates, and curing the cement blocks or cement blank plates in a vapor environment to obtain the pulverized-coal-ash-based porous artificial stone. The artificial stone mainly contains tobermorite and xonotlite, can replace the existing autoclaved aerated concrete and can be used as a load-bearing building block, a filler wall, a partition wall, a roof board or a wall board.

Description

technical field [0001] The invention relates to a preparation method of high-strength and light-weight artificial stone which can be used as building load-bearing blocks, filling walls and partition walls, roof panels and wall panels. Background technique [0002] With the rapid development of my country's national economy, the development scale of urban and rural industries and civil buildings is getting bigger and bigger. Especially in the past 10 years, with the continuous increase of high-rise and frame structure buildings, not only the demand for wall materials has increased greatly, but also more and more functions such as energy saving, light weight, environmental protection, heat preservation, and heat insulation are required. In recent years, various new lightweight building materials have been researched, developed and applied at home and abroad, and aerated concrete is one of them. [0003] The main raw materials of common fly ash air-entrained concrete are fly a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/04C04B18/08
CPCY02W30/91
Inventor 谭宏斌
Owner SHAANXI UNIV OF TECH
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