For a fixed cement content and aggregate grading, increasing the water-cement ratio generally causes concrete permeability to
Correct answer: B. Increase
- A. Decrease to zero
- B. Increase
- C. Remain exactly constant
- D. Change only during mixing
Explanation
A higher water-cement ratio leaves more capillary pores after evaporation, so permeability generally increases. This can reduce resistance to water penetration and aggressive agents.
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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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