Early-strength composite foam concrete foaming agent and preparation method thereof

Abstract

The invention belongs to the technical field of building materials, and particularly relates to an early-strength composite foam concrete foaming agent and a preparation method thereof. The early-strength composite foam concrete foaming agent comprises the following components in percentage by mass: 40%-80% of composite foaming components, 1.0%-5.0% of foam stabilizing components, 3.3%-22% of early-strength components and 10%-45% of water, wherein the composite foaming components are formed by compounding synthesized surface active agent foaming agents and protein foaming agents. The early-strength composite foam concrete foaming agent prepared through the method disclosed by the invention has the advantages of high foam expansion, excellent foam stability and good compatibility with general cement pastes; the early-strength composite foam concrete foaming agent disclosed by the invention is applied to foam concrete; the prepared foam concrete has no recess phenomenon and is fast enhanced in early strength, and the foam concrete with a density grade equal to 300 kg / m<3> or above is more easily prepared.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an early-strength composite foam concrete foaming agent and a preparation method thereof. Background technique [0002] Foaming agent refers to a kind of substance that can make its aqueous solution produce a large amount of foam when mechanical force is introduced into the air. Its essence is its surface activity. Without surface activity, it cannot foam, and it cannot become Foaming agent, surface activity is the core of foaming. At present, there are many types of foaming agents used in foamed concrete, mainly rosin soaps, synthetic surfactants, and proteins. The advantage of rosin soap foaming agent is that it is cheap and easy to get, but because of its poor stability, it is not suitable for production of 700kg / m 3 Low-density products below grade, such as Chinese patent CN200610034912.6 "Polymer Foam Concrete Cement Foaming Agent" is a kind of foami...

AI Technical Summary

Problems solved by technology

The advantage of rosin soap foaming agent is that it is cheap and easy to get, but because of its poor stability, it is not suitable for production of 700kg / m 3 Low-density products below grade, such as Chinese patent CN200610034912.6 "Polymer Foam Concrete Cement Foaming Agent" is a kind of foaming agent prepared with rosin soap foaming agent as raw material. Large bleeding and poor foam stability

Protein-based foaming agents have good foamability and foam stability, but due to high requirements for synthesis technology, it has been difficult to achieve the quality of foreign products in China, and the shelf life is short and the cost is high

The advantage of synthetic surfactant foaming agent is that foaming multiple is big, easy foaming, but its weak point is that bubble diameter is big, and bubble wall is thin, and defoaming is fast, and stability is not good, as Chinese patent CN101798200A " a kind of Nonionic Concrete Foaming Agent and Its Preparation Method” discloses a surfactant-based foaming agent, but the foaming agent has high requirements on raw materials, and the preparation process is relatively complicated. It needs to be invested in a special reaction generator, and its preparation The foaming agent has the common disadvantages of surface active foaming agents

Therefore, in recent years, the blowing agent has developed into a high-performance composite blowing agent. Through multi-component compounding, the advantages of each component are fully utilized, complementary advantages or synergistic effects are achieved, and new functions are added. For example, Chinese patent CN102964081A "a kind of Composite animal and vegetable protein foaming agent》A composite foaming agent was prepared by using protein foaming agent and synthetic surfactant foaming agent, its foaming performance and foam stabilizing performance are improved compared with ordinary single foaming agent , but its function is single. When preparing foam concrete, especially low-density foam concrete, it is easy to shrink, sink, collapse, and deform.

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