A 10-in thick, 26-foot wide concrete pavement is to be placed with a slipform paver using 8-cy batches mixed at a central mix plant. Each batch is mixed for an average of 1.9 min and the plant is 75% efficient. Plant production matches paver production. Paver production is 85% efficient. Truck cycle time is 50 min. Hourly rates:
Equipment | Labor |
Paver, $185 | Foreman, $43 |
Texture Bar, $30 | 3 Operators, $33 each |
Tine Bar, $30 | 9 Laborers, $28 each |
Water Truck, $18 | 2 Finishers, $41 each |
2 Pickups, $11 each | Truck driver, $29 each |
Haul Truck, $36 each |
|
Concrete materials cost $42.50/cy, batching cost is $9.00/cy, and incidentals cost $8.32/cy. Overhead and profit is 28% of the previous costs. Add an additional truck to balanced number.
Find (a) number of trucks, (b) paver speed, (c) $/cy cost, and (d) $/sy cost.
Plant production = 8 cy
1.9 min
75 efficiency
189.5 cy/hr
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