Compound type concrete foaming agent, preparation method and application thereof

Abstract

The invention provides a compound type concrete foaming agent, a preparation method and an application thereof. The compound type concrete foaming agent is prepared by compounding a component A and acomponent B, wherein the component A comprises 10-20 parts of polyvinyl alcohol, 15-25 parts of colophony, 1.5-2.5 parts of anhydrous sodium carbonate, 3.5-4.5 parts of industrial sodium hydroxide, 3-5 parts of triethanolamine, 0.2-0.5 parts of industrial grade hydrochloric acid and 53.5-55.8 parts of water; and the component B comprises 0.2-0.5 parts of triethanolamine, 8-10 parts of sodium sulfate, 12-15 parts of sodium nitrite, 10-25 parts of calcium chloride and 54.7-64.5 parts of water. The compound type concrete foaming agent not only can increase the doped quantity of the foaming agentbut also can compensate the concrete strength and the solidification time; the compound type concrete foaming agent can be used for manufacturing foam concrete with super-low capacity, also utilize alarge amount of waste residues, such as industrial and architectural rubbish and the like, to produce light foamed concrete.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to a composite concrete foaming agent and its preparation method and application, in particular to a foaming agent that can increase the amount of foaming agent and compensate the strength and solidification time of concrete. It is a composite foaming agent for producing ultra-low-capacity foamed concrete, and a large amount of waste residues such as industrial and construction waste can be used to produce lightweight foamed concrete. Background technique [0002] To prepare lightweight foamed concrete, it is first necessary to prepare a foaming agent with a large amount of foam and strong foam stabilizing ability. After foaming by mechanical means, it is mixed with concrete and cast into shape. The lightweight foamed (or foamed) concrete produced by the foaming agent is a porous material with a porosity of up to 85% and a thermal conductivity of 0.15-0.21 / (m.k). At present, there a...

AI Technical Summary

Problems solved by technology

Practice has proved that for every 1% increase in foaming air content, the compressive strength of concrete will decrease by about 5%, and the flexural strength will decrease by 2%-3%.

The strength of foam concrete is too low or does not meet the engineering requirements, which limits its application and promotion

In addition, a large amount of foaming agent will also cause slow setting or late setting of concrete, occupying tools and molds will affect its turnover, and even delay the construction period, etc.

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