What is a cement and what is it made out?

Answer 1

Cement is a fine powder that acts as a binding agent in construction, primarily used to make concrete and mortar. It is typically made from a mixture of limestone, clay, shells, and silica, which are heated in a kiln to form clinker, then ground into a powder. The most common type is Portland cement, which includes calcium silicates and other compounds that react with water to harden and provide structural strength.