(a) vacuum concrete
(b) air-entrained concrete
(c) saw dust concrete
(d) both (a) and (b)
e] both and [c]
The correct Answer Is
e] both and [c]
(b) air-entrained concrete
(c) saw dust concrete
(d) both (a) and (b)
e] both and [c]
The correct Answer Is
e] both and [c]