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) The following recipe was determined as part of a concrete mix design: Water-cement ratio:   0.48...

  1. ) The following recipe was determined as part of a concrete mix design:

Water-cement ratio:   0.48

Coarse aggregate:        0.60 ft3 CA (bulk volume, dry-rodded) per ft3 concrete

Water requirement:    9.6 lbs/ft3 (before moisture corrections)

Air content:                5.0% by volume

Assuming that the CA and FA to be used in the mix are both at SSD, the moisture content of the CA is 0.5%, the moisture content of the FA is 2.5%, the specific gravity of the CA and FA particles are both 2.70, the specific gravity of the cement is 3.15, and the bulk density of the CA is 110 lbs/ft3, calculate the following for a 1.0 ft3 batch of concrete (the unit weight of water is 62.4 lbs/ft3):

  1. The required weight of cement in the batch, Wc (lbs)
  2. The weight of coarse aggregate required, WCA (ft3)
  3. The weight of fine aggregate required, WFA (lbs) in the batch
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