Transcription of CIP 42- Thermal Cracking of Concrete
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CIP 42- Thermal Cracking of Concrete
CIP 42- Thermal Cracking of ConcreteWHAT is Thermal Cracking ?WHY Does Thermal Cracking Occur? Thermal Cracking occurs due to excessive temperature dif-ferences within a Concrete structure or its temperature difference causes the cooler portion to con-tract more than the warmer portion, which restrains the con-traction. Thermal cracks appear when the restraint results intensile stresses that exceed the in-place Concrete tensilestrength. Cracking due to temperature can occur in concretemembers that are not considered mass of cementitious materials generates heat for sev-eral days after placement in all Concrete members. This heatdissipates quickly in thin sections and causes no thicker sections, the internal temperature rises and dropsslowly, while the surface cools rapidly to ambient tempera-ture.
2009 References 1. ACI 207.2R, Report on Thermal and Volume Change Effects on Cracking of Mass Concrete, American Concrete Institute, www.concrete.org
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