Compare FAB

S. No.
Parameters Fly Ash Blocks Burnt Clay Bricks
1. Basic raw materials & other inputs Cement, Sand & Aggregate Top Soil & Energy
2. General Properties
Dry Density kg/m3 1200-2400 1900
Compressive Strength in kg/cm3 30-60 40-125
Range of applications / utility Non-load Bearing Walls Load-bearing & non-load bearing
Aging No gain in strength with age No gain in strength with age
Thermal Conductivity (W/m.k.) 0.184
Sound Insulation Good Normal
Ease of Working Difficult to work Normal
3. Shape & Form
Pre-cast Brick size 230 x 110 x 70 mm 230 x 100 x 70 mm
Pre-cast elements Not feasible Not feasible
Cast in shape Not feasible Not feasible
4. Water Absorption % by weight 20% by volume 20% by volume
5. Drying Shrinkage mm/meter 0.07 (M-25 Concrete) No shrinkage
6. Productivity 50% higher than brick Normal
7. Eco Friendliness Medium energy, No smoke Creates smoke, Uses high energy, Wastes agricultural land
8. Structural saving due to dead weight reduction Marginal dead weight reduction No additional saving