Sr No. | PARTICULAR | FLYASH BRICKS | CLAY BRICKS |
---|---|---|---|
1 | Manufacturing Process | Machine moulding and water curing in open area | Hand moulding and air drying & burning |
2 | Raw material | Flyash, Lime, Zypsum, Sand | Clay |
3 | Colour | Light Grey, Red | Red |
4 | Size | Uniform size with sharp right angle, edges 230 x 110 x 75 mm | Un uniform in size and shape |
5 | Weight | 2.75 kg./no. | 3 kg./no |
6 | Compressive strength | 50 to 70 kg/cm2 | 30 to 35 kg /cm2 |
7 | Dry density | 1450 kg/m3 | 1800 kg/m3 |
8 | Breakage | Less than 1% | More than 6% |
9 | Water absorption | Less than clay bricks | Higher |
10 | Nos.of bricks require for masonary work of one Cu.Mtr. | 440 nos | 475 nos |
11 | Cement mortar require for plasteras well as masonary work | 5 to 7 % less because of uniform size and shape of bricks | More because of un uniform size & shape of bricks |
12 | Efflorescence | Slight | Moderate |
13 | Resistance to salinity | Good | Poor |
14 | Water seepage | Almost nill | Moderate |
15 | Erosion property | Nil | Erosion often seen at plinth lavel |
16 | Fire rasistance | Better | Good |
17 | Resistance to termite | Good | Poor |