Concrete is a composite construction material composed primarily of aggregate, cement and water. Technically speaking, concrete is a heterogenous mixture that has several variations - it's recipe can include sand, ash, pumice, silica, quicklime, pozzolanic ash, crushed limestone, and crushed granite (to name a few). The chemical process in which concrete solidifies and dries is actually (and ironically) called hydration. The substance and invention actually date from the Roman Empire - indeed the word comes from the Latin word "concretus" (meaning compact or condensed).
Concrete can do just about anything...and looks stunning too! Who would have thought?
