A kind of preparation method of foam concrete

Abstract

A method for preparing foam concrete, comprising: (1) pre-wetting ceramsite with different densities; (2) filling different heights of concrete block molds with ceramsite with different densities after pre-wetting; (3) weighing according to the proportion Foaming agent water and foaming agent, pour the foaming agent into the foaming agent water and stir evenly for foaming; (4) Mix and stir the gel material to form a concrete slurry; (5) Mix the gel material in step (3) The formed foam is added into the step (4) and stirred to obtain a foamed concrete slurry; (6) the foamed concrete slurry is injected into the concrete block mold from the grouting hole at the bottom of the concrete block mold, and the overflow at the top of the concrete mold Stop the grouting after the slurry overflows from the orifice, and close the grouting hole; (7) Remove the mold after the curing time.

Description

Technical field [0001] The present invention relates to a method for preparing foam concrete, in particular to a method of preparing ceramic foam concrete by grouting method. Background [0002] With the development trend of high-rise and large-span buildings, a single ordinary concrete has been unable to meet the requirements of modern architecture, while light aggregate foam concrete has the advantages of light weight, high strength, good thermal insulation performance, strong seismic ability, excellent fire resistance, simple and diverse construction, which can effectively reduce the self-weight of the building, and has good thermal insulation performance, and has a wide range of uses in the building envelope. [0003] As one of the typical representatives of lightweight concrete, ceramic foam concrete, it has the advantages of light weight, good thermal insulation performance, good sound insulation and fire resistance, excellent fire durability, etc., and is widely used in th...

AI Technical Summary

Problems solved by technology

However, the foam of the foamed concrete slurry injected from the bottom of the mold will be broken, resulting in inconsistent wet bulk density of the filled slurry. During the static curing process, the heavier slurry sinks and the lighter slurry rises, so that The dry density of the formed ceramsite foam concrete in the vertical direction is smaller than that of the low part, which affects the performance of the ceramsite foam concrete

It is proposed in CN 201910996995.4 that when preparing foam concrete by grouting method, the intermediate is pre-prepared by two-step method, and then the ceramsite foam concrete prefabricated part is prepared on the basis of the intermediate, but the steps are complicated, and the intermediate and subsequent structure The bonding strength is not enough