ইটের রাসায়নিক উপাদানসমুহ (Constituents of Brick)
Constituents of Brick Clay and Their Functions : A good brick -clay should be such a mature of pure clay and sand that when prepared with water, it can easily be molded and dried without cracking or warping Silica = 55% Alumina = 30% Iron oxide =8% Magnesia =5% Lime =1% Organic matters =1% ---------------------------------------------- Total =100% *Classification of Bricks: The following is the classification of bricks by P.W.D in our country. 1.First class Bricks:These first class bricks are table moulded and of uniform shape and they are burnt in kilns. The surfaces and edge...
