the fine aggregate (FM = 2.70) and 2 percent FSM on the coarse aggregate. Original mix design was--

Cement

= 7.05 sacks (Type IA)

Water

= 38.6 gallons

CA

= 17.0 f or 1,768 lb/cy

FA

= 10.5 cf or 1,083 lb/cy

Air content

= 5 percent

CA 1,768 lb/cy x 0.02 = 35.36 lb/cy of water

FA 1,083 lb/cy x 0.06 = 64.98 lb/cy of water

Total weight of water = 100.34 lb/cy

in Step 1. Therefore, 38.6 gallons - 12 gallons = 26.6 gallons of water which must be added to the mix.

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