Preparation and pumping technology of lightweight aggregate concrete

Abstract

The invention relates to a preparation and pumping technology of lightweight aggregate concrete. The lightweight aggregate concrete is prepared from water, cement, fly ash, pottery sand, 400-grade ceramsite, a thickening agent, a water reducing agent and an air entraining agent. The preparation and pumping technology is characterized in that original sand and gravels in the concrete are replaced with the pottery sand and the 400-grade ceramsite to serve as new concrete aggregate, so that the apparent density of the concrete can be reduced; the use amounts of the cement, the fly ash and the water in the concrete are increased, wherein the cement and the fly ash are both powder with fine texture and are mixed with the water to serve as an adhesive; meanwhile, the thickening agent and the airentraining agent are added into the adhesive for enhancing the fluidity and cohesion of the concrete, so that pumping is facilitated; in addition, because the materials such as the pottery sand and the ceramsite in the concrete have good heat preservation property, the lightweight aggregate concrete has good thermal insulation effects.

Description

technical field [0001] The invention relates to a light aggregate concrete, in particular to a preparation and pumping process of the light aggregate concrete. Background technique [0002] Light aggregate concrete is composed of light coarse aggregate, light fine aggregate (or ordinary sand), cement and water, and the apparent density is not more than 1850Kg / m 3 of concrete. Among them, the lightweight aggregate concrete prepared from lightweight fine aggregate as femoral aggregate is full-light concrete; the lightweight aggregate concrete prepared from ordinary sand or part of lightweight fine aggregate as fine aggregate is sand-light concrete . Lightweight aggregate concrete is widely used in various projects due to its light weight, high strength, heat preservation, heat insulation, earthquake resistance, wear resistance and other functional characteristics. [0003] At present, in the preparation process of most lightweight aggregate concrete, ceramic particles are u...

AI Technical Summary

Problems solved by technology

[0003] At present, in the preparation process of most lightweight aggregate concrete, ceramic particles are usually selected as the lightweight aggregate; Aggregate concrete mainly includes cement, high-performance ceramsite, fly ash, slag, etc.; however, due to the large void ratio and high water absorption rate of ceramsite concrete, it is easy to cause large slump loss of freshly mixed concrete. Therefore, it is necessary to focus on the slump when producing light aggregate concrete