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Concrete
A mixture of Portland cement, sand, gravel and water. Lime may be used in place of the cement, in which case the mixture is known as lime concrete. If rods of steel are embedded in the concrete it is reinforced concrete. It these are put under tension while the concrete is setting, it is pre-stressed concrete. Reinforced concrete made in a mould to be used off-site is pre-cast concrete. Non-reinforced concrete is known as mass concrete. The timber or metal moulds used in casting concrete on site are known as shuttering.
Related Words
Aggregate; Cement, cementitious
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