Brick:
Brick is an artificial kind of stone of clay whose chief characteristics are a plasticity when wet and stone-like hardness after being heated to high temperature.
Field Test of Brick:
a) Try to make a mark on the brick surface by nail. If it is marked, it is not a good brick.
b) Strike the brick with a hammer. A good brick will give clear ringing or metallic sound.
c) Take to bricks and make a form of tee (T) and drop from a height of 6 feet on a solid ground. If it is not broken, it reflects a good brick.
Field Test of Brick
Characteristics of good bricks:
a) Bricks should be uniform in colour size and shape.
b) They should be sound and compact.
c) They should be free from cracks.
d) They should not absorb 1/5th of their weight of water, when immersed for 24 hours.
e) They should have compressive strength in the range of 5000 to 8000 psi.
f) They shouldn’t be over burnt or under burnt.
g) They should not change in volume when wet.
h) They should have low thermal conductivity.
e) They should have compressive strength in the range of 5000 to 8000 psi.
f) They shouldn’t be over burnt or under burnt.
g) They should not change in volume when wet.
h) They should have low thermal conductivity.
