Foam concrete and preparing process thereof

Abstract

The invention discloses foam concrete and a preparation method thereof. The foam concrete comprises a gelling material, light aggregate, water, admixture and foaming agent. The preparation method comprises the following steps: (1) pre-treating raw materials to prevent hard lumps and hard grains in the raw materials from depositing in foam slurry; (2) weighing each component according to a proportion; (3) preparing and adding foaming solution; (4) loading and stirring, namely, adding water into a stirrer, starting the stirrer, and adding cement, coal ash, perlite, waterproof agent, anti-freezing agent, water reducing agent and fiber into the stirrer in turn; (5) foaming, namely, foaming at the same time of stirring the slurry, sealing a valve firstly and then pressurizing the valve by an air compressor; (6) adding foam, namely, after the gelling slurry is well prepared, adding the foam into the gelling slurry under the state of stirring without stopping the stirrer; and (7) casting and molding, namely, when the slurry surface has no floating foam, finishing the preparation of the foam slurry. The foam concrete has the functions of light weight, water proofing, fire resistance, heat insulation, freezing resistance, cracking resistance, shock resistance and the like, and is particularly suitable for engineering insulating layers in cold areas and water-blocking and shock-resistant layers of underground engineering.

Description

technical field [0001] The present invention relates to a kind of concrete, more specifically to a kind of foam concrete, also relates to the preparation method of the foam concrete. The concrete can be widely used in cold area engineering and underground engineering, and is suitable for cold area engineering insulation layer and underground engineering water blocking and anti-seismic layer. Background technique [0002] The reform of building materials and building energy conservation have become the basic national policies of our country, and the research and development of new building materials that meet the national building energy conservation standards has become the mission of material researchers. [0003] Foam concrete is to use mechanical means to make a foaming agent (aqueous solution) into foam, and then mix the foam into siliceous materials (sand, fly ash), calcium materials (cement, lime), etc., as well as various external admixtures and water. The mixture is...

AI Technical Summary

Problems solved by technology

It can be seen that the shrinkage rate of ordinary cement concrete is the smallest, the shrinkage rate of cement paste is relatively large, and the shrinkage rate of foamed concrete is the largest, and the tensile strength of foamed concrete is the lowest. use

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