5 to 10%
20 to 30%
50 to 60%
70 to 80%
impermeable
brittle and weak
to lose cohesion
to crack and warp on drying
190 mm x 90mmx 80 mm
190 mm x 190 mm x 90 mm
200 mm x 100 mm x 100 mm
200 mm x 200 mm x 100 mm
cracking and warping of bricks
loss of cohesion
enhancing the impermeability of bricks
none of the above