Whats the difference between concrete and cement? What is the difference?
concrete usually has sand and gravel mixed in.
cement is a crushed rock, mainly limestone, mixed with some clays and gypsum, and heated to a high temp. When mixed with water, it undergoes a chemical change to form a very hard, stonelike substance. concrete is a mixture of cement and aggregate - usually sand and gravel.
Cement or actually Portland cement is just one compenent of concrete. Concrete is the finished product. From Encarta: Cement is a fine gray powder of calcined limestone and clay. Use: mixed with water and sand to make mortar, or with water, sand, and aggregate to make concrete. 2. concrete: a building material that sets hard to form concrete, made by mixing cement with water, sand, and aggregate
Technically, cement is the major ingredient (along with sand, gravel, water and other possible additives) used to make concrete. So when you refer to the finished product, concrete is the proper term, though people often say cement to mean the same thing.
Concrete is a mix of cement, sand, aggregate and water. Cement is a component of concrete or mortar (Mortar is sand and concrete). So cement is the hardening agent used in mortar or concrete.
