Production process of autoclaved aerated concrete containing high-calcium dry red fly ash

Abstract

The invention discloses a production process of autoclaved aerated concrete containing high-calcium dry red fly ash. The production process comprises the steps: pulping, powder grinding, casting, cutting and steam curing, wherein during pulping, the high-calcium dry red fly ash, quartz sand, gypsum and water are mixed uniformly at a ratio so as to prepare stand-by slurry, and after quicklime is ground into fine powder, pouring is performed; during pouring, the stand-by slurry, the powdery quicklime and cement are weighed at a ratio, then feeding is performed uniformly by a feeder, even stirring is performed so as obtain mixed slurry, and an aluminum powder solution is added at a ratio so as to form a liquid-phase mixture; and aluminum powder reacts with a medium water in an alkaline environment so as to generate hydrogen gas, the quicklime reacts with water, and silica in the quartz sand reacts with Ca(OH)2 and AL2O3 in the cement and quicklime under a hydrothermal synthesis conditionso as to produce hydrated calcium silicate and hydrated calcium aluminate and form a green body, and steam curing is performed after cutting is performed on the green body. The strength of the productis enhanced by the produced hydrated calcium silicate and hydrated calcium aluminate together, and the problem of difficult improvement of compression resistance, seismic resistance, tensile resistance and shear strength of walls in the prior art is solved.

Description

technical field [0001] The invention relates to the field of decorative building materials, in particular to a production process of autoclaved aerated concrete containing high-calcium dry red fly ash. Background technique [0002] At present, the walls of traditional structures are mostly brick-concrete structures or commercial concrete structures. Due to the low strength of the masonry, the cross-sectional size of the components is relatively large, which results in a large amount of materials and high self-weight. Because the traditional walls are basically All of them are mainly manual, and the construction labor is heavy. The tensile and shear strength of the traditional wall structure is very low, so the earthquake resistance is poor, and its use is subject to certain limits, and its compressive strength is also poor. Therefore, how to improve the compressive strength, earthquake resistance, tensile strength and shear strength of the wall has become a technical proble...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a production process for autoclaved aerated concrete containing high-calcium dry red fly ash. The main raw material of high-calcium dry red fly ash generally requires SiO in quartz sand 2 The content is greater than 90%, and the high-calcium dry red fly ash mainly provides SiO 2 , SiO 2 Under the condition of hydrothermal synthesis and Ca(OH) in cement and quicklime 2 and AL 2 o 3 The reaction produces calcium silicate hydrate and calcium aluminate hydrate, which jointly enhance the strength of the product and solve the problem of the existing technology that is difficult to improve the wall's compression resistance, earthquake resistance, and The Tensile and Shear Strength Conundrum