Can somebody help me with this problem, I am not getting it right.
Given: A concrete mix contains cement, moist sand, and moist coarse aggregate in the
following proportion by weight: 1:1.8:2.6. The following specifications are given:
Cement specific gravity = 3.15
SSD sand (m.c. = 0.5%) specific gravity = 2.70
SSD coarse aggregate (m.c. = 0.7%) specific gravity = 2.60
Added water 5.8 gal per sack cement
Air 3% (by volume)
The aggregates used for mixing the concrete had the following properties:
Wet sand: moisture content = 6%
Wet coarse aggregate: moisture content = 4%
Find: The water content of the concrete is most nearly:
(A) 6.1 gal/sack
(B) 7.1 gal/sack
© 7.9 gal/sack
(D) 8.5 gal/sack
Given: A concrete mix contains cement, moist sand, and moist coarse aggregate in the
following proportion by weight: 1:1.8:2.6. The following specifications are given:
Cement specific gravity = 3.15
SSD sand (m.c. = 0.5%) specific gravity = 2.70
SSD coarse aggregate (m.c. = 0.7%) specific gravity = 2.60
Added water 5.8 gal per sack cement
Air 3% (by volume)
The aggregates used for mixing the concrete had the following properties:
Wet sand: moisture content = 6%
Wet coarse aggregate: moisture content = 4%
Find: The water content of the concrete is most nearly:
(A) 6.1 gal/sack
(B) 7.1 gal/sack
© 7.9 gal/sack
(D) 8.5 gal/sack
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