Concrete


 * Definitions **

Concrete: is a manufactured mixture of cement and water, with aggregates of sand and stones. Reinforced concrete:  is a manufacture mixture that adds the tensile strength of steel to the compressive strength of mass concrete Concrete-shell construction:  was a development that permitted the erection of vast vaults and domes with a concrete and steel content so reduced that the thickness was comparatively less than that of an eggshell. Precast-concrete construction:  was a development that employs bricks, slabs, and supports made under optimal factory conditions to increase waterproofing and solidity, to decrease time and cost in erection, and to reduce expansion and contractions. Prestressed concrete:  is a development that provides bearing members into which reinforcement is set under tension to produce a live force to resist a particular load.