Thermal cracking in a large concrete member is most likely when
Correct answer: B. Temperature differences develop between its interior and surface
- A. The aggregate grading is slightly different from the design grading
- B. Temperature differences develop between its interior and surface
- C. The concrete surface is finished with a wooden float
- D. The cement paste contains no entrapped air
Explanation
Hydration heat can make the interior of a large member hotter than its surface. Differential expansion and later contraction create tensile stresses that may exceed the early tensile strength of concrete.
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About Concrete Technology
Concrete technology covers cement, aggregates, water and admixtures, including their properties, proportioning and effect on fresh and hardened concrete. It explains workability, water-cement ratio, setting, hydration, strength, durability, curing, mix design and common defects, while distinguishing segregation and bleeding from general loss of workability.
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