Question

The minimum water to cement ratio for cement concrete to hydrate is _______

(a) 0.65

(b) 0.5

(c) 0.38

(d) 0.27

I have been asked this question during an internship interview.

This interesting question is from Process of Manufacture of Fresh Concrete topic in section Fresh Concrete of Concrete Technology

Answer 1

The correct option is (c) 0.38

To explain: Minimum water cement ratio is 0.38. It cannot be 35 kg. W/C ratio depends on the exposure condition of concrete but minimum water cement ratio is 0.38 for full hydration of concrete.