Aerated concrete block and production process thereof

Abstract

The invention discloses an aerated concrete block. The aerated concrete block is prepared from 15 to 25% of oyster shell powder, 35 to 40% of fly ash, 25 to 35% of constructional waste, 18 to 25% of lump lime, 5 to 15% of cement and 1 to 5% of aluminum powder. According to the invention, oyster shells (mussel shells) are crushed and ground and rationally proportioned as main aggregate for production of the aerated concrete block; due to characteristics of the oyster shells (mussel shells), the physical properties (including lightweight, heat insulating ability, anti-compression performance, fire resistance, sound absorption performance, durability, water seepage resistance, workability and the like) of the aerated concrete block can be improved by 20% or above to a greatest extent; pollution is not produced in the process of processing and grinding; cementing materials (such as cement and gypsum) are saved; ash preparation through burning of the oyster shells produces pollution due to usage of coal, and pollution caused by the oyster shells (mussel shells) in coastal regions greatly perplexed local governments due to nondegradablility of the oyster shells (mussel shells) and exerts great influence on construction of livable cities; and with the help of the production process for the aerated concrete block, the life of people and the environment can be improved, the waste is turned into the valuable, the policy of cyclic utilization advocated by the government is abided by, and energy conservation and emission reduction are realized.

Description

technical field [0001] The invention relates to an aerated concrete block brick, in particular to an aerated concrete block brick and a production process. Background technique [0002] Most of the existing aerated concrete block 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.) Because there is no thermal power plant in some areas, the supply of raw material fly ash is far away and the transportation cost is high (energy is wasted in the transportation process), and sand is often used as a substitute for raw materials. Affected, some products are missing edges and corners, and the fracture phenomenon is serious, which affects the qualified rate of finished brick floors, and also generates secondary garbage. [0003] Sea oyster shells are a by-product of aquacultur...

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Problems solved by technology

The calcination process will pollute the environment

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