Carbonation of concrete containing pfa Available to Purchase

Depths of carbonation at an age of 8·3 years are reported for concretes prepared using one Portland cement and for companion concretes in which 35% by mass of the Portland cement was replaced by one or other of two types of pfa. It is shown that the depth of carbonation in Portland/pfa concretes is similar to that in Portland cement concretes of similar 28-day compressive strength.