Preparation method of pressure-resistant coal ash autoclaved bricks

An autoclaved brick and coal ash technology, applied in the field of autoclaved bricks, can solve problems such as poor quality, low strength, and easy cracking, and achieve the effects of increasing dosage, improving quality, and improving freeze-thaw resistance and drying shrinkage performance

Inactive Publication Date: 2017-12-29
TONGLING FENGZE BUILDING MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fly ash autoclaved products with solid waste such as fly ash or tailings as the main raw material is one of the top ten demonstration projects for the comprehensive utilization of bulk solid waste specially supported and promoted by the country during the "Twelfth Five-Year Plan" development. 1. However, the current fly ash autoclaved bricks generally have technical problems of poor quality, low strength and easy cracking

Method used

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  • Preparation method of pressure-resistant coal ash autoclaved bricks
  • Preparation method of pressure-resistant coal ash autoclaved bricks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A preparation method of pressure-resistant coal ash autoclaved brick, comprising the steps of:

[0015] S1. Mix fly ash, slag, and stone powder evenly, add urea, sodium lauryl sulfate, and water to mix evenly, add polyethylene glycol to stir, add phenolic resin to stir, add phosphoric acid to mix evenly, and obtain a prefabricated material;

[0016] S2. statically press the prefabricated material, and perform autoclave treatment to obtain pressure-resistant coal ash autoclaved bricks.

Embodiment 2

[0018] A preparation method of pressure-resistant coal ash autoclaved brick, comprising the steps of:

[0019] S1. Mix 25 parts of fly ash, 30 parts of slag, and 2 parts of stone powder in parts by weight, add 4 parts of urea, 1 part of sodium lauryl sulfate, and 80 parts of water, mix evenly, add 5 parts of polyethylene glycol and stir 50min, the stirring speed is 600r / min, add 18 parts of phenolic resin and stir for 3min, the stirring speed is 2400r / min, add 1 part of phosphoric acid and mix evenly to obtain the prefabricated material;

[0020] S2. The prefabricated material is statically pressed into shape, the pressing pressure is 26MPa, the pressing time is 1min, the autoclaving treatment is 30h, the autoclaving temperature is 185°C, and the autoclaving pressure is 0.6MPa to obtain a pressure-resistant coal ash autoclaved brick.

Embodiment 3

[0022] A preparation method of pressure-resistant coal ash autoclaved brick, comprising the steps of:

[0023] S1. Mix 35 parts of fly ash, 10 parts of slag, and 12 parts of stone powder in parts by weight, add 2 parts of urea, 2 parts of sodium lauryl sulfate, and 40 parts of water, mix well, add 18 parts of polyethylene glycol and stir 30min, the stirring speed is 800r / min, add 4 parts of phenolic resin and stir for 8min, the stirring speed is 2000r / min, add 2 parts of phosphoric acid and mix evenly to obtain the prefabricated material;

[0024] S2. The prefabricated material is statically pressed into shape, the pressing pressure is 22MPa, the pressing time is 2min, the autoclaving treatment is 20h, the autoclaving temperature is 195°C, and the autoclaving pressure is 0.4MPa to obtain the pressure-resistant coal ash autoclaved brick.

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Abstract

The invention discloses a preparation method of pressure-resistant coal ash autoclaved bricks. The preparation method comprises the following steps: evenly mixing coal ash, furnace slag and stone powder, adding urea, sodium dodecyl sulfate and water, and evenly mixing; then, adding polyethylene glycol and stirring, adding phenolic resin and stirring, adding phosphoric acid and evenly mixing so as to obtain a prefabricated material; carrying out static compression molding on the prefabricated material, and autoclaving to obtain the pressure-resistant coal ash autoclaved bricks. The preparation method of the pressure-resistant coal ash autoclaved bricks not only reduces the pollution and lowers the cost, but also can reduce the occupation of a large amount of civilian farmland; furthermore, after the method is adopted, the compression resistance, bending strength, resistance to freezing and thawing and drying shrinkage performance of finished products are effectively improved.

Description

technical field [0001] The invention relates to the technical field of autoclaved bricks, in particular to a preparation method of pressure-resistant coal ash autoclaved bricks. Background technique [0002] With the continuous deepening and development of my country's building energy-saving and wall material innovation work, environmentally friendly and energy-saving new building materials are changing with each passing day and developing rapidly. At present, the fly ash autoclaved products with solid waste such as fly ash or tailings as the main raw material is one of the top ten demonstration projects for the comprehensive utilization of bulk solid waste specially supported and promoted by the country during the "12th Five-Year Plan" development. One, but the current fly ash autoclaved bricks generally have technical problems of poor quality, low strength, and easy cracking. Contents of the invention [0003] Based on the technical problems existing in the background t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/12
CPCC04B26/122C04B2201/50C04B22/165C04B24/32C04B22/002C04B24/16C04B24/126C04B14/02C04B18/141C04B18/08
Inventor 梅林
Owner TONGLING FENGZE BUILDING MATERIALS TECH
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