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Elementary,Middle School,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 408 Weeks Ago, 3 Days Ago |
| Questions Answered: | 66690 |
| Tutorials Posted: | 66688 |
MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
An asphalt plant will produce 180 tph for a highway project. The mat will be 12 ft wide and 1!-in. thick, and will have a density of 115 lb/sy-in. A vibratory roller with a 66-in.-wide drum will be used for compaction. Assume a 50-min hour efficiency factor for the roller. The overlap between adjacent laps and over edges will be 6-in. minimum. It is estimated that nonproductive travel will add about 15% to total travel. From a test mat, it was found that three passes with the roller are required to achieve density. To account for acceleration and deceleration when changing directions, add 10% to the average roller speed to calculate a running speed. If it is desired to keep the rolling speed under 3 mph, how many rollers are required for the project?
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