Autoclaved sand-lime brick and production technology

Abstract

The invention discloses an autoclaved sand-lime brick, which is made from 20-35% of oyster shell powder, 30-45% of construction waste, 20-35% of sand, 10-15% of lime, and 10-15% of chip powder. Pulverized and ground oyster shells (mussel shells) can be taken as a main material aggregate for producing the autoclaved sand-lime brick according to a reasonable ratio. According to the feature of the oyster shell powder, the quality (such as compression resistance and fracture resistance) of the brick is improved by no less than 30%, no pollution is caused during a grinding process, and the cementing material (such as cement, gypsum, and so on) is saved. Oyster shell incineration for ash production causes pollution due to coal burning, and what's more, oyster shells or mussel shells cannot be degraded, so that pollution generated in the coastal region troubles the government a lot and greatly affects livable city construction. If the production technology is implemented, people's livelihood and environment are improved, and the production technology conforms to the cyclic utilization policy greatly advocated by the government. Therefore, the purpose of wastes to valuables conversion and energy conservation and emission reduction are really achieved.

Description

technical field [0001] The invention relates to an autoclaved lime-sand brick, in particular to an autoclaved lime-sand brick and a production process. Background technique [0002] Most of the existing autoclaved lime-sand bricks use fly ash as the main raw material. During the production process, in order to improve the production performance of the brick floor and the physical and mechanical properties of the product, more mixed cementing materials (such as cement, gypsum, etc.) are mixed. Because there is no thermal power plant in the area, the supply of raw material fly ash is far away and the transportation cost is high (energy is wasted in the transportation process). Most of the raw materials are replaced by sand, which has an impact on the quality of the brick floor due to the high mud content in the sand. , causing some products to lack edges and corners, and the fracture phenomenon is serious, which affects the qualified rate of finished brick floors, and also gen...

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Problems solved by technology

The calcination process will pollute the environment

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