Problem 1
A soil borrow material in its natural state in the ground has a unit weight of 125 pcf. Its natural water content is 15 %. What is the dry weight of this material?
Problem 2
A CAT D25D truck with a heaped capacity of 18.3 CY. If material weighs 2,500 lbs/CY in its bank state, swells by 20% when excavated and shrinks by 5% when compacted, answer the following questions.
How many Bank Cubic Yards will fills the Truck?
What is the Weight of the material per Loose Cubic Yard?
How many Compacted Cubic Yards will you haul per truck load?
How much does the material weigh in its compacted state?
Problem 3
You are preparing a cost estimate for an earthmoving project. The contract specifications require a 800,000 CY embankment with a dry unit weight of 125 lbs/cf and a water content of 12%.
A pre project investigation reveals that the material available in a borrow pit has a unit weight of 105 lbs/cuft with a 7% water content. How many CY of excavation will be required to construct the embankment?
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Borrow
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Embankment
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105 pcf
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? d
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125 pcf
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7%
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12%
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Vol
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800,000 CCY
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Problem 4
An embankment is to be constructed at a 15% moisture content. Material will be placed at the rate of 200 ccy/hr. The specified dry weight of the compacted fill is 110 lb/cf. How many gallons of water must be supplied each hour to increase the moisture content of the material from 7 to 15% by weight?