Steam-press air-entrainment concrete self-heat conserving building block by using sand of Yellow River and preparation method

Abstract

The invention relates to a steam-press air-entrainment concrete self-heat conserving building block by using sand of Yellow River, which comprises the Yellow River sand and waste fly ash after the coal is burned in a power plant; the concrete self-heat conserving building block comprises the following components by weight percentage: 55-63% of the Yellow River sand, 5-16% of fly ash, 12.5-15% of quicklime, 2.5-3.0% of slaked lime, 1.0-2.0% of desulfurized gypsum, 0.08-0.12% of aluminum powder paste, 0.02-0.04% of foam stabilizer and the balance of cement. The building block takes the cheap Yellow River sand as a raw material, and has the advantages of light unit weight, strong processability, low heat conduction coefficient and good self-heat conserving effect.

Description

technical field [0001] The invention belongs to the technical field of building wall materials, and in particular relates to an autoclaved aerated concrete self-insulating block prepared by using sand from the Yellow River and a preparation method thereof. Background technique [0002] From the perspective of social energy consumption structure, the energy consumption of industry, transportation and buildings is generally divided into three parts. The world's building energy consumption has reached about 1 / 3 of the total energy consumption; while my country's building energy consumption has also reached about 1 / 4 of the country's total energy consumption, and it is gradually increasing with the improvement of people's living standards. Among all building energy consumption, the energy consumption of building envelope accounts for a large proportion. my country's building energy conservation has been listed as a programmatic document and a rigid building index. Its core is t...

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Problems solved by technology

Autoclaved aerated concrete self-insulating blocks use the generation of many tiny air bubbles in the concrete to achieve thermal insulation performance, but most of the autoclaved aerated concrete block products have defects of varying degrees: either the thermal insulation effect is up to standard but the strength is not high, or the block It is easy to be damaged, or the construction is inconvenient, so it cannot be promoted and applied better

The above-mentioned situation of self-insulating blocks has led to the passive use of secondary insulation in most buildings, that is, after the building is completed, light-weight insulation materials such as foam plastic boards and rubber powder polystyrene boards are externally pasted or hung, resulting in a large amount of construction. high construction cost

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