The removal of excess air after placing concrete helps in increasing the strength of concrete by
(a) 15 to 20 %
(b) 20 to 30 %
(c) 30 to 50 %
(d) 50 to 70 %
The correct Answer Is
(a) 15 to 20 %
(a) 15 to 20 %
(b) 20 to 30 %
(c) 30 to 50 %
(d) 50 to 70 %
The correct Answer Is
(a) 15 to 20 %