Compaction Testing of Granular Materials
| 项目名称： | Compaction Testing of Granular Materials |
| 摘要： | The South Dakota Department of Transportation (SDDOT) and many other state departments of transportation (DOT�s) have used the Ohio Department of Transportation�s (ODOT) Typical Moisture Density Curves for the compaction of granular soil materials. However, the ODOT Materials Manual states �Moisture-Density proctor curves and controls were originally developed to be used on cohesive (clays and silts) soils. Errors or complications arise when trying to extrapolate these principals to granular materials.� Therefore, additional information is needed by the SDDOT in assessing compaction of these materials. SDDOT is also using more materials recycled from portland cement concrete (PCC) pavements and asphalt concrete pavements as subbase and base courses. Recycled materials are placed using the test strip method to determine how much effort is needed to achieve acceptable levels of compaction. Test strips work well for large areas but become problematic for small areas. SDDOT has identified a need to reevaluate how they determine whether granular material has been compacted to the desired density. Most compaction testing has been performed using the nuclear gauge or sand cone methods, and the in-place density standard is determined by either the use of a test strip or a moisture density relation curve (Proctor). Some DOTs have started using newer methods such as the lightweight deflectometer (LWD), dynamic cone penetrometer (DCP), proof rolling and the use of intelligent compaction. The SDDOT wishes to examine how other DOTs determine the in-place density of granular materials. The SDDOT also wishes to determine whether the current Ohio curves are adequate for their needs or should be updated and whether the SDDOT needs to use different test methods to ensure adequate compaction. |
| 状态： | Active |
| 资金： | 65000 |
| 资助组织： | Research and Innovative Technology Administration |
| 管理组织： | Mountain-Plains Consortium |
| 项目负责人： | Kline, Robin |
| 执行机构： | Dept. of Civil and Environmental Engineering |
| 主要研究人员： | Jones, Allen L |
| 开始时间： | 20150819 |
| 预计完成日期： | 20190930 |
| 实际结束时间： | 0 |
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