We have been asked to prepare 100 yd³ of normal concrete using a volume ratio of cement–sand–coarse aggregate of 1:2:4. The water–cement ratio (by weight) is to be 0.5. The sand contains 6 wt% water, and the coarse aggregate contains 3 wt% water. No entrained air is expected.
(a) Determine the number of sacks of cement that must be ordered, the tons of sand and aggregate required, and the amount of water needed.
(b) Calculate the total weight of the concrete per cubic yard.
(c) What is the weight ratio of cement– sand–coarse aggregate?