A kind of red sandstone aerated concrete and preparation method thereof

Abstract

The invention belongs to the field of building materials. A red sandstone aerated concrete is characterized by being prepared from dry materials and water, and the ratio of water to material is 0.50-0.64. The dry materials include, by weight, 8%-15% of cement, 50%-75% of red sandstone, 10%-20% of lime, 1%-5% of gypsum, 0.5%-3% of metakaolin, 0%-3% of calcined hydrotalcite, 0.02%-0.15% of aluminum powder paste, 0.2%-5% of water glass and 0.05%-2% of a modifier, wherein the water glass is calculated by the solid content, and the ratio of water to material calculates the water contained in the water glass. The invention utilizes the red sandstone to prepare the energy-saving insulation wall material in line with the standard requirements, improves utilization of red sandstone, and eases the problem of shortage of river sand resources.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a red sandstone aerated concrete and a preparation method thereof. Background technique [0002] With the development of society, the shortage of global resources is becoming more and more severe, the energy consumption of buildings has soared, and the importance of energy saving in buildings has become increasingly prominent. 30% of the total energy consumption, the research and development, promotion and use of new energy-saving wall materials have gained a good opportunity and development space. [0003] Aerated concrete is a man-made material with a porous structure. It has the advantages of light weight, heat preservation, sound insulation, earthquake resistance and fire prevention. It is a wall material that saves soil, waste, and energy. Air-entrained concrete has a history of more than 40 years in our country. According to incomplete statistics, th...

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Problems solved by technology

[0005] Red sandstone is widely distributed in Hubei, Hunan and other regions in my country, and the distribution in Hunan alone reaches more than 40,000 km 3 At present, the development and utilization rate of red sandstone is at a low level. In the field of road engineering, when the technical conditions cannot meet the requirements of using red sandstone as roadbed filler, it is necessary to carry out long-distance transportation, discarding and land-finding stacking, which will not only cause construction High cost and may pollute the environment

Another study uses red sandstone to undergo solid-phase reaction at high temperature to produce high-temperature sintered bricks or ceramic materials. Such products consume a lot of energy, pollute the environment, and have a low market share.

It can be seen that the current utilization rate of red sandstone is at a low level

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