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Method for preparing foam concrete product by using solid foaming agent

A foam concrete and foaming agent technology, applied in the field of foam concrete, can solve the problems of slow strength growth and influence on cement hydration, etc., and achieve the effect of easy production process, easy storage and good stability

Inactive Publication Date: 2017-08-29
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of foaming is mainly used in cast-in-place projects, which has good stability, but affects cement hydration and slow strength growth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0027] According to the ratio, at least 40 parts of P.O42.5 cement, 20 parts of water, 0.01 part of hydroxypropyl methylcellulose, 0.6 part of ferrous sulfate, 0.4 part of vinyl acetate and ethylene copolymer and modified silicone polyether Add 0.04 parts of microemulsion to the container successively, keep stirring for 1 minute, then add 3 parts of solid foaming agent sodium peroxycarbonate into the slurry and stir for 20 seconds to form a foam concrete slurry; quickly pour the slurry into the mold, 20 0 Cured under C conditions for 2 days and demoulded to obtain foamed concrete products, continued to be cured at this temperature for 26 days, and the dry density of the foamed concrete was measured to be 416.3g / m 3 , The compressive strength is 1.19MPa.

specific Embodiment 2

[0028] According to the ratio, at least 55 parts of P.O42.5R cement, 35 parts of water, 0.02 parts of hydroxyethyl methylcellulose and methyl cellulose, 0.8 parts of ferrous chloride, and 0.7 parts of vinyl acetate and ethylene copolymer And 0.07 parts of modified silicone resin polyether microemulsion were added to the container in sequence, and continued to stir for 2 minutes, then 4 parts of solid foaming agent sodium peroxycarbonate were added to the slurry and stirred for 40 seconds to form a foam concrete slurry; the slurry was quickly poured into molds, 65 0 C curing under steam environment for 6 hours, thereby obtaining foamed concrete products. The measured dry density of foam concrete is 366.3g / m 3 , The compressive strength is 0.86MPa.

specific Embodiment 3

[0029] According to the ratio, at least 60 parts of P.O42.5R cement, 40 parts of water, 0.03 parts of hydroxyethylmethylcellulose, methylcellulose and hydroxypropylmethylcellulose, ferrous chloride and sulfurous acid Add 1 part of iron, 1 part of vinyl acetate and ethylene copolymer, and 0.1 part of modified silicone polyether microemulsion into the container in sequence, and continue stirring for 3 minutes, then add 2 parts of solid foaming agent sodium peroxycarbonate into the slurry and stir 30 seconds to form a foam concrete slurry; quickly pour the slurry into the mold, 65 0 Curing in C steam environment for 6.5 hours to obtain foam concrete products. The measured dry density of foam concrete is 430.3g / m 3 , The compressive strength is 1.08MPa.

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Abstract

The invention discloses foam concrete, and particularly discloses foam concrete prepared by using a solid foaming agent. The invention provides a method for preparing a foam concrete product by using a solid foaming agent. The stability of bubbles generated during foaming is relatively good and the hydration effect on cement is relatively small, thereby obtaining the foam concrete with relatively good performance. The foaming agent is used for foaming of the foam concrete, and is capable of stabilizing foaming and accelerating hydration of concrete, so that the strength of the foam concrete is quickly improved.

Description

technical field [0001] The invention relates to the field of foam concrete, in particular to a method for preparing foam concrete products by using a solid foaming agent. Background technique [0002] Foamed concrete is a concrete product that contains a large number of small closed pores and has considerable strength by introducing air, nitrogen, carbon dioxide or oxygen into the concrete slurry through physical or chemical foaming methods. The foaming process of foamed concrete is mainly divided into physical foaming and chemical foaming. Due to the different types of foaming agents and different forming mechanisms, the performance of foamed concrete prepared by different processes is significantly different. [0003] The physical foaming mechanism is a physical action that does not produce new substances, and bubbles are generated under the action of mechanical stirring. This method of foaming is mainly used in cast-in-place projects, which has good stability, but affect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/02
CPCC04B28/04C04B2201/20C04B2201/50C04B24/383C04B22/149C04B24/2623C04B24/42C04B22/10C04B38/02C04B22/12
Inventor 戴民贺中泽方鑫
Owner SHENYANG JIANZHU UNIVERSITY
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