![]() ![]() This steel can be placed under tension (either before pouring as pre-tensioned reinforced concrete or after curing, post tensioned reinforced concrete). For the last 100 years or so Steel reinforcing wire or bar ( ‘rebar’ ) has been imbedded within the concrete slabs to overcome this weakness. So it is good pillars, but not poor for beams. It is very hard and in its normal state can withstand high compression loads but it has one major weakness - it cannot resist tension loads, having perhaps a tenth of its compressive strength when it is pulled. ![]() Other elements may include Brick/Block work, Metalwork, Glass, Plastics, External cladding, constructional skin cladding, Glass/MMM fibre and WooĬoncrete is an incredibly strong man made mixture of aggregate (sand and gravel), cement and water that has been used in construction since Roman times. Some very early buildings used Brick and concrete combinations and the most modern buildings have a higher proportion of Steelwork, but concrete remain the standard material. ![]() The vast majority of the UK residential High rise buildings are built of Reinforced concrete.
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