of materials needed to construct the retaining wall shown in Figure 2-9. The 1-cubic-yard mix design is recapped

below.

Cement

= 7.05 sacks (Type IA)

Water

= 38.6 gallons

CA

= 17.0 cf or 1,768 lb/cy

FA

= 10.5 cf or 1,083 lb/cy

Air content

= 5 percent

simple geometric shapes. Divide the retaining wall into two sections, the wall portion and the footing. A close

examination of Figure 2-9 shows the wall cross section is a trapezoid, which is 14 feet 9 inches high, 8 inches

wide on one end, and 1-foot wide on the other.

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