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Method for reinforcing autoclaved aerated concrete by using external reinforcing agent

An autoclaved air-entraining and reinforcing agent technology is applied in the field of lightweight thermal insulation building materials, which can solve the problems of reducing the performance of aerated concrete - thermal insulation performance, etc. Effect

Inactive Publication Date: 2012-09-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of existing autoclaved aerated concrete reinforcement methods that need to change the preparation process of aerated concrete or reduce the important performance of aerated concrete—insulation performance, the present invention provides an externally used reinforcing agent to enhance autoclaved aerated concrete The method can strengthen autoclaved air-entrained concrete without changing the preparation process of autoclaved air-entrained concrete
And it has almost no effect on the thermal insulation performance of air-entrained concrete

Method used

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  • Method for reinforcing autoclaved aerated concrete by using external reinforcing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use of inorganic and organic topical enhancers. Prepare the same autoclaved air-entrained concrete as in Comparative Example 1, after drying, immerse in the inorganic external surface enhancer for 6 hours, dry it at room temperature, put it into the organic external surface enhancer for 20 minutes, and bake it at 40°C After drying to constant weight, the same physical and mechanical properties as in Comparative Example 1 were tested.

[0032] The inorganic external strengthening agent is composed of a lithium silicate aqueous solution with a mass percent concentration of 18% and diethylene glycol butyl ether accounting for 5% of the total weight of the inorganic external strengthening agent.

[0033] The organic topical enhancer is composed of 35% RMAT, 50% xylenone, and 15% propylene oxide phenyl ether.

Embodiment 2

[0035] Prepare the same autoclaved aerated concrete as Comparative Example 1, after drying, after drying, dip in the inorganic exterior surface enhancer for 8 hours, dry at room temperature, put into the organic exterior surface enhancer and soak for 30 minutes, After drying at 40° C. to constant weight, the same physical and mechanical properties as in Comparative Example 1 were tested.

[0036] The inorganic external strengthening agent is composed of aqueous solution of lithium silicate and sodium silicate with a mass percent concentration of 30% and ethylene glycol butyl ether accounting for 2% of the total weight of the inorganic external strengthening agent.

[0037] The organic external enhancer is composed of 20% PGCN-702, 72% acetone, and 8% propylene oxide butyl ether.

Embodiment 3

[0039]Prepare the same autoclaved aerated concrete as in Comparative Example 1, after drying, immerse in the inorganic external surface enhancer for 10 hours, dry it at room temperature, put it into the organic external surface enhancer for 40 minutes, and test it after drying The same physical and mechanical properties as Comparative Example 1.

[0040] The inorganic external strengthening agent is composed of a lithium silicate aqueous solution with a mass percent concentration of 10% and ethylene glycol butyl ether accounting for 6% of the total weight of the inorganic external strengthening agent.

[0041] The organic external enhancer is composed of 50% 102C-1, 38% styrene, and 12% propylene oxide butyl ether. Styrene can also be replaced with alcohol or toluene.

[0042] The test results of strength and expansion degree of above embodiment are shown in Table 1

[0043]

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Abstract

The invention discloses a method for reinforcing autoclaved aerated concrete by using an external reinforcing agent. The method comprises the following steps of: cleaning the autoclaved aerated concrete, then totally permeating the inorganic reinforcing agent into the dried to constant-weight autoclaved aerated concrete in a mode of impregnation, spraying or brushing, and naturally airing the autoclaved aerated concrete at room temperature. The external inorganic reinforcing agent consists of 10 to 30 mass percent of aqueous solution of silicate and water-soluble film forming agent, and the water-soluble film forming agent accounts for 2 to 6 percent of the total weight of the inorganic reinforcing agent. By reasonably selecting the reinforcing agent and controlling the permeating time ofthe two-component reinforcing agent, the dry density of the reinforced aerated concrete is changed little, and pores and heat insulation performance are changed little. The aerated concrete reinforced by adopting the method has high strength and good water resistance, and can keep original properties of light weight and heat insulation. The reinforcing method does not need to change the formula and the preparation process of the original autoclaved aerated concrete, so the method is simple and feasible.

Description

technical field [0001] The invention relates to the technical field of lightweight thermal insulation building materials, in particular to a reinforced autoclaved aerated concrete. Background technique [0002] Autoclaved aerated concrete has a series of excellent properties: light weight, low thermal conductivity, good thermal insulation performance, can reduce the thickness of the wall and the quality of the building itself, thereby reducing the foundation size of the building and improving Improve the utilization of land and save materials. At the same time, autoclaved aerated concrete can also improve the efficiency of building construction and reduce the cost of construction. In addition, since the weight of the entire building is reduced, its ability to resist earthquakes is also improved, thereby further promoting the process of housing modernization. Therefore, the autoclaved aerated concrete block is one of the new wall material products that the country encoura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/52
Inventor 李敏吴智仁吴智深
Owner SOUTHEAST UNIV
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