I was given moisture contents of 5%, 9%, 14%, 22% and 25% with corresponding wei

Question

I was given moisture contents of 5%, 9%, 14%, 22% and 25% with corresponding weights of 3.1, 3.42, 3.78,3.85, 3.77 lbs. of the compacted soil. (specific gravity =2.7)(compaction test using compaction mold of 1/30 ft^3). I found the dry unit weights and moist unit weights for each. I believe i have also accurately found max dry unit weight which was 99.5 lb/ft^3 and optimum moisture content, my question is : If the initial water content of the soil is 9% how many gallons of water per cubic yard should be added to the fill material to reach 100% maximum dry unit weight and optimum moisture content? Any help and equations you can give me will be greatly appreciated. Thank you!

Explanation / Answer

One cubic foot contains 7.48 U.S.gallons of water. One U.S. gallon of water weighs 8.34 pounds, so one cubic foot of water weighs 62.38 lbs.
Since one gallon equals 128 fluid ounces, a cubic foot of water contains 7.48 x 128 fluid ounces, or 957.44 ounces.

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