PROPERTIES AND APPLICATION OF CHALK

Chalk relates to hard floor rock. His strength depends on humidity. Temporary compression resistance in the air-dry state ranges from 1000 to 4500. Dry chalk has a modulus of 3000 MPa (for loose chalk) to 10,000 MPa (for tight) and behaves as an elastic body. The angle of internal friction is chalk, clutch under hydrostatic compression…

Properties of clay

Dry clay absorbs water, but when wet, it becomes waterproof. After pereminaniya and mixing it acquires the property take various forms and save them after drying. This property is called plasticity. Besides binding ability the clay has: a powdered solids (sand) gives homogeneous “dough” also possessing ductility, but to a lesser degree. Obviously, the more…