Stone powder-doped foam concrete

Abstract

The invention provides stone powder-doped foam concrete, and belongs to the technical field of foam concrete. The stone powder-doped foam concrete is prepared from the following components in percentage by mass: 5 to 20 percent of SiO2, 35 to 55 percent of CaO, 1.5 to 6 percent of MgO, 0.1 to 3 percent of Fe2O3 and 2 to 6 percent of Al2O3. Based on the invention, the defects of high shrinkage rate and high water absorption rate of the foam concrete are improved at the same time.

Description

technical field [0001] The invention belongs to the technical field of foam concrete, and in particular relates to foam concrete mixed with stone powder. Background technique [0002] As a new type of environmentally friendly, energy-saving and green building material, foam concrete has excellent performance, so it is widely used. It can be produced into prefabricated products of various sizes in the factory, and it can be poured on site for large-volume application requirements. Foam concrete has the same service life as concrete materials, so it is gradually used in building thermal insulation construction, such as roof insulation, floor heating insulation, wall insulation, etc.; used as fireproof materials, earthquake-resistant materials, sound-absorbing materials, filling and backfilling materials , is also used in tunnels and airports, and has special properties that ordinary concrete cannot do. However, due to factors such as high porosity, high cementitious material ...

AI Technical Summary

Problems solved by technology

So far, most of the foam concrete researched and developed in my country is cement foam concrete, cement-sand system and cement-fly ash-sand system foam concrete, with single products and low cost performance

There are also many problems. For example, in an environment with a large water-to-material ratio, the stability of the slurry will deteriorate, so the foam concrete is prone to problems such as difficulty in molding; the shrinkage of the foam concrete is restricted, and it is very easy to crack, which affects the normal use of the foam concrete. ; In addition, in order to ensure the excellent thermal performance of foamed concrete, there is little admixture of aggregates in its preparation, which lacks the support of aggregates and shows a high shrinkage rate; the water consumption of foamed concrete is large, resulting in large porosity , so that it can absorb a large amount of external water, resulting in high water absorption and large shrinkage.

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