Tag Archive for Tag: restraint

Tag: restraint External restraint

It may be possible to avoid external restraint by the provision of movement joints, but in most structures it is necessary to cast subsequent pours against hardened concrete in order to satisfy the requirements of continuity in the structural design. The risk of thermal cracking is particularly great in canti- levered retaining walls for reservoirs, basements, bridge abutments, etc. When

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Tag: restraint Internal restraint

Figure 3.21 illustrates the stress induced when concrete is subjected to early-age temperature history. After placing a large mass of concrete, the temperature rise due to the heat of hydration generated causes the interior of the concrete to become hotter than the surface layers, where heat is lost to the atmosphere unless the mass is completely insulated. The consequent differential

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