Click image to view full size image
Autoclave Aerated Concrete Equipment AAC Block Machine / Concrete Block machine
Raw Materials
The main materials are sand, cement, lime and aluminum powder.
1. Cement
425 # cement shall be acceptable.
2. Sand
The sand shall be requested as standard JC/T 622<sand for silicate building products>, The more quartz content, the better result of production.
Table3-1 Chemical content of sand
| Chemical | SiO2 % | K2O+Na2O | Organic compound | Mica % | SO3 % | Mud % | H2O% |
| excellent | ≥85 | ≤1 | Suitable | ≤0.5 | 1 | 3 | 8 |
| I | ≥75 | ≤3 | 5 | ||||
| II | ≥65 | ≤5 | ≤1 | 2 | 8 |
Table3-2 Granulation of sand
| Granulation | Percent % | ||
| Excellent | I-Class | II-Class | |
| 2.5~5.0(Round hole) | 0 | 0 | |
| 1.25~2.5(Square hole) | 10 | 10 | |
| 0.16~0.25(Square hole) | 60 | 45 | |
| <0.16(Square hole) | 30 | 45 | |
3. Lime
The lime shall be requested as JC/T 621-2009<lime for silicate building products
4. Aluminum powder
The aluminum powder shall be requested as JC/T 407-2008<aluminum powder for AAC
General Processing Description
1. After crushing, the lime & gypsum grains are stored in vertical silo, the granularity should be no more than 25mm. Then the grains are fed into ball mill by separate belt scale, and will be sent to granular cementation silo when granularity reaches 3500~4000cm2/g.
2. Mill the sand to slurry in wet ball mill and put the slurry into tank for storage.
3. Add the sand slurry, granular cementation materials & cement which are scaled as per proportion into the casting tank equipped with stirrer for mixing, a certain amount of steam should be entered into the stirrer for increasing the raw materials temperature to 40~45.
4. After mixing of 3~4min, open the discharger valve of aluminum powder, feed
Autoclave Aerated Concrete Equipment AAC Block Machine For Fly Ash Brick
