Method for preparing self-heat-preservation building block by using aerogel sand and grouting

Abstract

The fly ash, water and an exciting agent are proportionally put into a ball mill for ball milling, and slurry after ball milling is pumped into a fly ash exciting tank for thermal excitation at the temperature of 70 DEG C or above; a pre-prepared mold is filled with air-setting sand, paved and covered with a steel mesh gland. And adding a small amount of cement into the pre-excited fly ash slurry, uniformly stirring, pouring into a mold filled with air-setting sand, oscillating, exhausting, pre-curing, cutting by using a steel wire, and carrying out steam curing to obtain the inorganic homogeneous self-heat-preservation building block with the compression resistance of more than or equal to 5MPa and the heat conductivity coefficient of less than or equal to 0.12 W/(m.K). The technology is suitable for aerated block production equipment and production lines. The self-insulation building block is suitable for 75% energy-saving application in cold regions. And a new technology is imported into the traditional industry to quickly form large-scale productivity. The technology has obvious industrial upgrading and social benefits. The self-heat-preservation building block has the obvious cost performance advantage.

Description

technical field [0001] In the field of building materials, non-metallic materials, silicate materials, building insulation materials. Background technique [0002] A city full of high-rise buildings has become the leading household in various industries due to energy consumption for heating and air conditioning. In order to save energy and reduce emissions, the building has adopted a series of measures, and has now entered the era of 75% energy saving. For the insulation of buildings in severe cold regions, the system of aerated blocks filling the wall and the outer wall is bonded and anchored for external insulation. This system meets 65% energy saving. There are many advantages, but there are also many disadvantages. Especially the shedding of the outer insulation layer is unacceptable in a city full of tall buildings. To end the external wall insulation system, block materials with better strength and lower thermal conductivity are needed. In 2021, Xinjiang launched se...

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Problems solved by technology

The disadvantage of this method is that it is difficult to control the structure of the l...