Foam concrete insulation board prepared by use of quicklime spontaneous heating

A technology of foam concrete and quicklime, which is applied in the field of concrete for construction, can solve the problems of increasing preparation costs and cumbersome experiment process, and achieve the effect of improving product strength, simplifying experiment, and saving heating water temperature

Inactive Publication Date: 2014-09-03
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of chemical foaming, both water temperature and ambient temperature will have an impact on the preparation of foamed concrete. Considering that the ambient temperature and water temperature are crucial to the preparation process of foamed concrete, if the water temperature is adjusted according to the ambient temperature for the preparation of foamed concrete, the increase will increase. Preparation cost, experimental process is more cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] 140 parts of cement, 40 parts of fly ash, 2 parts of calcium stearate, 1 part of polypropylene fiber, 4 parts of ferrous sulfate in crystal water, 0.5 parts of quicklime, 8 parts of hydrogen peroxide, and 130 parts of water.

[0019] The foam concrete insulation board is prepared by chemical foaming, and the preparation process is as follows:

[0020] (1) 140 parts of cement, 40 parts of fly ash, 2 parts of calcium stearate, 4 parts of crystal water ferrous sulfate, 0.5 part of quicklime, and 1 part of polypropylene fiber are mixed evenly;

[0021] (2) Add water to the uniformly mixed material in 1), stir at a constant speed of 80-120r / min for 3min, add liquid foaming agent and continue stirring for 3-5s under the condition of continuing stirring, stop stirring, pour into the mold Foaming for 12-24h;

[0022] (3) After removing the formwork, the prepared foam concrete was cured at 20°C for 48 hours.

example 2

[0024] 140 parts of cement, 30 parts of fly ash, 10 parts of silica fume, 2 parts of calcium stearate, 1 part of polypropylene fiber, 4 parts of ferrous sulfate in crystal water, 1 part of quicklime, 8 parts of hydrogen peroxide, and 140 parts of water.

[0025] The foam concrete insulation board is prepared by chemical foaming, and the preparation process is as follows:

[0026] (1) Mix 140 parts of cement, 30 parts of fly ash, 10 parts of silica fume, 2 parts of calcium stearate, 4 parts of crystal water ferrous sulfate, 1 part of quicklime, and 1 part of polypropylene fiber;

[0027] (2) Add water to the uniformly mixed material in 1), stir at a constant speed of 80-120r / min for 3min, add liquid foaming agent and continue stirring for 3-5s under the condition of continuing stirring, stop stirring, pour into the mold Foaming for 12-24h;

[0028] (3) After removing the formwork, the prepared foam concrete was cured at 20°C for 48 hours.

example 3

[0030] 140 parts of cement, 30 parts of fly ash, 10 parts of silica fume, 2 parts of calcium stearate, 1 part of polypropylene fiber, 3 parts of ferrous sulfate in crystal water, 2 parts of quicklime, 6 parts of hydrogen peroxide, and 140 parts of water.

[0031] The foam concrete insulation board is prepared by chemical foaming, and the preparation process is as follows:

[0032] (1) Mix 140 parts of cement, 30 parts of fly ash, 10 parts of silica fume, 2 parts of calcium stearate, 3 parts of crystal water ferrous sulfate, 2 parts of quicklime, and 1 part of polypropylene fiber;

[0033] (2) Add water to the uniformly mixed material in 1), stir at a constant speed of 80-120r / min for 3min, add liquid foaming agent and continue stirring for 3-5s under the condition of continuing stirring, stop stirring, pour into the mold Foaming for 12-24h;

[0034] (3) After removing the formwork, the prepared foam concrete was cured at 20°C for 48 hours.

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Abstract

The invention relates to a foam concrete insulation board prepared by use of quicklime spontaneous heating. The foam concrete insulation board comprises the following components in parts by weight: 100-140 parts of cement, 30-40 parts of an admixture, 5-11 parts of an additive, 1-2 parts of fiber, 6-10 parts of a foaming agent and 90-140 parts of water. The foam concrete insulation board is prepared as follows: (1) evenly mixing according to the formula ratio; (2) adding the water into a uniformly mixed material in the step (1), stirring at a constant speed, adding the liquid foaming agent and stirring under the condition of continuous stirring, stopping stirring, pouring into a mould for static foaming; and (3) after stripping, curing prepared foam concrete at 20 DEG C for 48 hours. The foam concrete insulation board prepared by use of a chemical foaming method can avoid to cause the energy waste in the process of heating water temperature according to the fact that quicklime can release heat when meeting the water and has a stimulating effect on activity of fly ash, effective calcium oxide in the quicklime can react with silica in the fly ash to produce a hydration product, and the hydration product has the product strength enhancement effect.

Description

technical field [0001] The invention relates to building concrete, in particular to a foam concrete insulation board prepared by utilizing quicklime self-heating. Background technique [0002] Foamed concrete is widely used in the construction field because of its light weight, good thermal insulation performance and good fire resistance, and is an indispensable new building material. [0003] Foamed concrete has a high porosity, and when the size of the cells is suitable and evenly distributed, the foamed concrete will have high strength. The foamed concrete prepared by the chemical foaming method, due to the relationship between stirring and temperature, makes its internal pore structure meet the requirements. It is difficult, and there will be problems such as foam collapse and uneven foaming. Improving the strength of foam concrete is the focus of the research process. [0004] In the process of chemical foaming, both water temperature and ambient temperature will have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B22/06C04B38/02
Inventor 谷亚新王延钊王晴刘运学范兆荣
Owner SHENYANG JIANZHU UNIVERSITY
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