Autoclaved Aerated Concrete Blocks/Panels Production Process

AAC blocks/panels is a kind of lightweight, porous, heat preservation, thermal insulation and acoustic material made of calcium-containing material (cement, lime), silica-containing material (quartz sand, tailing powder, fly ash, granular blast furnace slag, shale, etc.) and aerating agent (aluminium paste for AAC, GLS-65 or GLS-70) as raw materials,

FLY ASH : LIME:CEMENT: GYPSUM - 69:20:8:3

Aluminum Paste accounts for around 0.08 percent of the total dry ingredients in the mix.

Ratio of water = 0.60-0.65

The mixing and pouring cycle take 5.5 minutes.

which is finely grinded, dosed, stirred, poured, cut and autoclaved and maintained. It can be made into wall blocks, roof panels, wall panels and floor panels. Its density is generally 600~700kg/m3, which is about 3/5 lighter than reinforced concrete and 2/5 lighter than brick structure, with low thermal conductivity, good heat preservation, good seismic performance and fire resistance, and good processability. Usually, the heat preservation effect of 200mm thick aerated concrete is equivalent to 490mm thick clay brick wall, which not only saves building materials, but also improves the utilisation coefficient of the building surface. Aerated concrete blocks are mainly used for external wall panels, which can be divided into: vertical external wall panels, horizontal external wall panels and assembled external wall panels.

In the whole aerated block production process, it works as follows.

First of all (1) a variety of raw materials storage warehouse → (2) measurement of ingredients → (3) raw materials with water mixing and stirring → (4) mould preparation a (5) pouring → (6) gas static stop → (7) demoulding → (8) turning, horizontal cutting, repeated cutting → (9) grouping into the kettle → (10) high temperature and pressure maintenance → (11) finished product out of the kettle → (12) inspection of the finished product → (13) packaging → (14) palletizing and storage of a (15) leaving the factory.