Performance Assessment by Using Nondestructive Testing
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2006-02-01
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Abstract:This project was conducted to determine the correlation of field performance to Hamburg Wheel Tracking Device (HWTD) testing results. HWTD measures the combined effects of rutting and moisture damage by rolling a steel wheel across the surface of an asphalt concrete specimen that is immersed in hot water. The test results from this laboratory equipment have been promising in regard to evaluating the moisture susceptibility of hot mix asphalt mixtures. While there is some information on the relationship between the laboratory results from this test and the field performance, it is quite limited. This 5-year research project will be an important step in validating the test and ensuring that the test results could be reliably used to predict performance. Three designs (Superpave, CMHB-C, and Type C) and three aggregate sources (siliceous gravel, sandstone, and quartzite) were used for this study. The test sections including nine different mixture designs were constructed on IH-20 in Harrison County to observe the performance of the overlays under real traffic conditions. Field performance will be observed through visual pavement condition surveys and nondestructive tests for four years. This research report summarizes the nondestructive test results and visual pavement condition surveys in the third year of this study.
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