Question 2
(a)Sketch a corner profile and label the following:
(i)building line;
(ii)trench line mark;
(iii)wall line mark.
(b)State one use of each of the following types of brick
(i) fire brick;
(ii) facing brick.
(c) List four types of block used for wall construction.
Observation
Most candidates were able to:
- sketch a corner profile and label the parts;
- list four types of block used for wall construction.
However, few of them were unable to state one use of fire brick and facing brick.
b(i) Uses of firebricks
- lining of chimney shafts;
- construction of boilers;
- construction of ovens;
- construction of kilns;
- construction of furnace.
(ii) Uses of facing bricks:
- they are used for facing buildings;
- they are used for constructing load and non-load bearing walls;
- they are used to provide a durable and pleasing finish or aesthetic effects in building;
- they are used as voussoirs in arch construction.
(c)i. Types of blocks used for wall construction:
According to materials:
- sandcrete block;
- landcrete block;
- concrete block;
- clay block.
ii. According to shapes:
- hollow block;
- solid block;
- cellular block.
iii. According to densities:
- lightweight aggregate block;
- dense aggregate block.