Drying shrinkage in hardened concrete is mainly caused by
Correct answer: A. Loss of moisture from the cement paste
- A. Loss of moisture from the cement paste
- B. Expansion of aggregate particles in water
- C. Chemical attack by atmospheric oxygen
- D. Increase in the volume of entrained air
Explanation
Drying shrinkage occurs when moisture leaves capillary pores in the hardened cement paste, producing contraction. Aggregate generally restrains this movement rather than causing it.
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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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