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Density Profiling of Asphalt Pavements. Final rept.
| 题名： | Density Profiling of Asphalt Pavements. Final rept. |
| 作者： | SHULER, S. |
| 关键词： | *Asphalt-pavements; *Highway-construction.;Density-measurement; Segregation-; Hot-mixing-paving-mixtures; Design-; Indicators-; Voids-; Statistical-analysis; Nondestructive-testing. |
| 摘要： | Asphalt pavement density measurements were made using a conventional nuclear density gauge and a new electrical resistivity device called the Pavement Quality Indicator. Five sets of density tests were made at each of nine sites during, or immediately following paving operations between July and September, 2004. Testing at each site attempted to capture differences in density caused by segregation under five distinct sets of circumstances. These included strip segregation along the centerline created by the auger gearbox of the paver, other visible segregation caused by practices such as truck dumping practices and hopper wing folding, transverse segregation caused by inherent design configurations of the paver including the slat conveyor system, screed extensions and stopping of the paver. Control sections were included where segregation was not visible during construction. Tests were conducted at random for each data set and replicated so that rigorous statistical analysis could be conducted. Results indicate that for the strip and visible data sets, an average decrease in density apparently occurs in the location of the segregation when all nine sites are included in the analysis. |
| 报告类型： | 科技报告 |
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