Preparation process of high-compression-resistance light weight foam concrete

Abstract

The invention discloses a preparation process of high-compression-resistance light weight foam concrete. The preparation process comprises the following steps: preparing active mixing materials: uniformly mixing river sand, glass fiber, a naphthalenesulfonate water reducing agent and active silica; preparing slurry: controlling by an automatic foamed cement equipment mainframe, and respectively injecting water, cement, an active mixing material and a propylene organic thickener according to the proportion through a water pump and a material injector in a double-shaft mixer in a mixing state, wherein the water adding frequency, the material injecting frequency and the power input frequency of a stirring engine are controlled within the range of 0-70 HZ; preparing foam with a foaming agent; controlling by the automatic foamed cement equipment mainframe, and preparing foam with the foaming agent through a plunger pump and an air compressor; mixing and pouring the prepared mixed slurry in a moulding die. Concrete prepared by the preparation process has the advantages of being better in sound insulation and heat insulation effects, and excellent in compression resistance and the like.

Description

technical field [0001] The invention relates to a preparation process of foamed concrete, in particular to a preparation process of lightweight foamed concrete with high compression resistance. Background technique [0002] Foamed concrete is a member of the concrete family. It usually prepares a foaming agent aqueous solution into a foam by mechanical means, and then adds the foam to a slurry composed of siliceous materials, calcium materials, water and various admixtures. It is a kind of porous material made by mixing, pouring and curing. Because foam concrete contains a large number of closed pores, it has good physical and mechanical properties such as low density, light weight, thermal insulation, sound insulation, and earthquake resistance. It is a new type of building material. [0003] The basic raw materials of foam concrete are cement, lime, water, and foam, and some fillers, aggregates, and admixtures are added on this basis. Commonly used fillers and aggregat...

AI Technical Summary

Problems solved by technology

But it still has certain defects, such as low strength, cracking, water absorption, etc. At present, when the volume density of domestic foam concrete is 800-859kg / m3, the compressive strength of the foam concrete is seriously low, generally lower than 2.0MPa, Some are even less than 1.0MPa

Due to the destructive effect of Na, K, etc. on the air bubbles in the foamed concrete, most of the pores are open, which seriously affects the thermal insulation and sound insulation performance of the foamed concrete.

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