What is the difference beween concrete and cement?
In general terms concrete is a mixture of aggregate, water and a cement binder. Cement is an ingredient in concrete. In construction, concrete is a composite building material made from the combination of aggregate and a cement binder. Concrete does not solidify from drying after mixing and placement; the water reacts with the cement in a chemical process known as hydration. This water is absorbed by cement, which hardens, gluing the other components together and eventually creating a stone-like material. When used in the generic sense, this is the material referred to by the term concrete. (http://en.wikipedia.org/wiki/Concrete#Cement) In the most general sense of the word, cement is a binder, a substance which sets and hardens independently, and can bind other materials together. Most important cements are hydraulic cements, materials which set and harden after combining with water, as a result of chemical reactions with the mixing water and, after hardening, retain strength and stab
