3.5 N/mm2

7.0 N/mm2

10.5 N/mm2

14.0 N/mm2

to impart plasticity

to make the brick durable

to prevent shrinkage

to make the brick impermeable

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