Building  Owners  and  Managers  Association  International

Building Owners and Managers Association International

PORTLAND CEMENT

Portland cement is the most common type of cement in general use, as it is a basic ingredient of concrete and mortar. It consists of a mixture of oxides of calcium, silicon and aluminum. Portland cement and similar materials are made by heating limestone (as source of calcium) with clay or sand (as source of silicon) and grinding the product. The resulting powder, when mixed with water, will become a hydrated solid over time.