the soil interlocking brick machine mainly use the soil to produce the soil interlocking bricks.
cement,sand and other material also need to be added.
but what is the the raw material proportion is suitable?
below raw material proportion can be as reference:
using Fly ash – Lime – Gypsum – Cement- Sand (Fal-G), other fly Ash based combination OR Soil-Cement (Compressed Stabilized Earth Blocks SEB) OR Stone Dust – Cement.
Different mix designs can be made to suit the quality, cost of raw material and compresive strength of blocks required. Eg. the blocks have been successfully made using following combinations :
FLY ASH CEMENT BLOCK
Fly ash = 35% – 60%
Coarse sand = 35% – 70%
Stabilizer = 8% – 15% (including lime, cement, gypsum)
STABILIZED EARTH BLOCK
Soil = 60 – 70%
Coarse sand = 20 – 30%
Cement = 5 – 10%
The block strength is determined by nature of Soil / Fly Ash , quantity of Cement and other materials used . The water curing after manufacture of blocks plays a important role in final compresive strength and quality of blocks.
In past we have obtained results as indicated below:
Soil – Cement Blocks Fal-G – C. Sand
Cement Content Strength Cement Content Strength
5% 4 to 5 MPa 8% 7 to 8 MPa
10% 7 to 8 MPa 10% 12 to 13 MPa
1 MPa is equal to 10 Kg / Sq. cm
It can be up to 3 times better than conventional brick masonry.
Good quality blocks can be made to give:
For Fly Ash- Cement: Up to 15%.
For Stabilized Earth Block: Up to 12%.