Question

Reducing water/cement ratio in concrete during manufacturing results in

• A. Increase in $28$ days compressive strength
• B. Decrease in $28$ days compressive strength
• C. No change in $28$ days compressive strength
• D. Significant increase in tensile strength

Answer 1

The correct option is A Increase in $28$ days compressive strength

Strength of workable concrete
$S=\frac{A}{B^{w/c}}$ (Abram's law)
$S=$ Strength of concrete.
$A$ and $B$ are constants.
$w/c=$ Water cement ratio which varies $0.3$ to $1.20$.
Reducing water/cement ratio then strength (compressive strength) of Concrete in $28$ days increase.