Concrete
Concrete is a construction material composed of cement as well as other cementitious
materials such as fly ash and slag cement, aggregate (generally a coarse aggregate
made of crushed rocks such as limestone, or granite, plus a fine aggregate such as
sand), water, and chemical admixtures.
Concrete is used to make pavements, pipe, architectural structures, foundations, roads,
bridges, parking structures, brick/block walls and footings for gates, fences and poles.