Classification of Bricks Based on their Quality
The bricks used in construction works are classified as:
(i) First class bricks
(ii) Second class bricks
(iii) Third class bricks and
(iv) Fourth class bricks
(i) First Class Bricks: These bricks are of standard size and shape. They are burnt in kilns. They fulfill all the desirable properties of bricks.
(ii) Second Class Bricks: These bricks are cast in the ground and burnt in kilns. Edges may not be sharp and uniform. The surface may be somewhat rough. Such bricks are usually used for the construction of walls which are plastered on.
(iii) Third Class Bricks: These bricks are cast on the ground and burnt in clamps. Their edges are somewhat distorted. When struck together they produce a monotonous sound. They are used for temporary and unimportant structures.
(iv) Fourth Class Bricks: These are more burnt bricks. Their color is dark. The shape is irregular. They are used as aggregates for concrete in foundations, floors and roads.
Uses of Bricks
Bricks are used in the following civil works:(i) As building blocks.
(ii) For lining of ovens, furnaces and chimneys.
(iii) To protect steel pillars from fire.
(iv) R.C.C. As an aggregate in providing water proofing to roofs
(v) For pavers for footpaths and cycle tracks.
(vi) For laying sewer line.