Autoclaved aerated concrete block and preparation method thereof

Abstract

The invention discloses an autoclaved aerated concrete block with high strength and low shrinkage value. The autoclaved aerated concrete block comprises the following components by weight: 50-68 parts of fly ash, 3-5 parts of gypsum, 18-25 parts of quicklime, 6-15 parts of cement, and 8 parts of aluminum powder. The autoclaved aerated concrete block itself is an environment-friendly novel building material with low energy consumption.

Description

Technical field [0001] The invention relates to a method for preparing autoclaved aerated concrete blocks. Background technique [0002] my country is a country with a large population and a shortage of energy and land. Traditional building materials, mainly sintered solid clay bricks, destroy a large number of fields, waste land resources and pollute the environment. Therefore, prohibiting the use of solid clay bricks in urban construction is a major national decision to implement sustainable development strategies. In accordance with the national land resources protection policy, the General Office of the State Council’s "Notice on Further Promoting Wall Material Innovation and the Promotion of Energy-saving Buildings" (Guobanfa [2005] No. 33) spirits, the National Development and Reform Commission, the Ministry of Land and Resources, the Ministry of Construction, The Ministry of Agriculture jointly issued the "Notice on Announcement of the Second Batch of List of Cities Proh...

AI Technical Summary

Problems solved by technology

[0004] As a new type of wall material, air-entrained concrete is a low-energy, environmentally-friendly new building material, which is very in line with the national policy requirements. However, due to the problems of large drying shrinkage and low strength of ordinary air-entrained concrete, it is not used in actual projects. It often leads to common problems in construction projects such as wall cracks that are not easy to solve

In order to solve the problem of large drying shrinkage of air-entrained concrete, people have made a lot of efforts, including changing the mix ratio of its raw materials, using admixtures and other methods. Although these methods have certain effects, they all have their limitations.