Types of bricks,

 Classification of Bricks Based on their Quality

The bricks used in construction 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 shape and size. They are burnt in kilns. They fulfill all desirable properties of bricks.

(ii) Second Class Bricks: These bricks are ground moulded and burnt in kilns. The edges may not be sharp and uniform. The surface may be some what rough. Such bricks are commonly used for the construction of walls which are going to be plastered.

(iii) Third Class Bricks: These bricks are ground moulded and burnt in clamps. Their edges aresomewhat distorted. They produce dull sound when struck together. They are used for temporary and unimportant structures.

(iv) Fourth Class Bricks: These are the over burnt bricks. They are dark in colour. The shape is irregular. They are used as aggregates for concrete in foundations, floors and roads.

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