Production technology for autoclaved aerated concrete building block

Abstract

The invention discloses a production technology for an autoclaved aerated concrete building block. The production technology is characterized in that the material formula comprises, by weight, 65% of fly ash, 15% of cement, 14% of lime, 5.5% of phosphogypsum and 0.5% of aluminum powder. The production technology comprises the following steps: firstly, slurries are prepared, namely, fly ash is ground by utilization of a ball grinding mill to prepare a fly ash slurry, phosphogypsum is added with water, then stirring is carried out for 1h, a phosphogypsum slurry is prepared, and then lime is crushed and ground to lime powder by utilization of the ball grinding mill; secondly, blending and stirring are carried out, namely, all the materials are sent to a casting mixer, the casting mixer is started, stirring is carried out and a concrete slurry is obtained; thirdly, casting and die entering are carried out, namely, all the concrete slurry in the casting mixer is placed in a die, and casting is carried out; fourthly, namely, a green body is thickened and condensed gradually; fifthly, cutting is carried out, namely, the shaped green body is cut according to a designed size; sixthly, autoclaved curing is carried out, namely, the cut green body is sent to an autoclaved curing kettle for autoclaved curing, and a finished product aerated concrete building block is obtained.

Description

technical field [0001] The invention relates to the field of aerated concrete, in particular to a production process of an autoclaved aerated concrete block. Background technique [0002] The aerated concrete block is a solid block made of cement, slag, sand, lime, etc., added with an air-generating agent, stirred and formed, and autoclaved. According to the application, the aerated concrete can be divided into non-load-bearing blocks , load-bearing blocks, insulation blocks, wall panels and roof panels five. Aerated brick has the advantages of light bulk density, high thermal insulation performance, good sound absorption effect, certain strength and machinability, etc. It is one of the earliest and most widely used lightweight wall materials in China. The vast majority of aerated concrete products in my country are blocks, which are mostly used for filling and maintaining structures in frame structures. [0003] Existing building wall materials include clay solid bricks, ...

AI Technical Summary

Problems solved by technology

Autoclaved aerated concrete blocks with fly ash as the main raw material have certain defects, such as: excessive radioactive substances, tight supply and demand of raw materials, poor frost resistance, and cannot be well combined with mortar during masonry construction, which may easily cause the wall to fall off and other quality accidents, especially radioactive pollution that seriously endangers human health

At the same time, the current production method of aerated concrete blocks is mostly made by mixing various raw materials, and then mixing them with water in proportion, molding, and pressurized curing. Since this method mixes all raw materials together, it requires a large-power mixing equipment. , the cost is high, and it is easy to stir unevenly, which affects the product quality

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