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Temperature Correction Factor for Pavement Moduli Backcalculated from Falling Weight Deflectometer Test

机译:落锤挠度计试验反算的路面模量温度校正系数

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Falling Weight Deflectometer (FWD) deflections were collected from four in-service pavements in Shanghai. Moduli backcalculated with MODULUS 6.0 from all sites were used to develop the temperature correction factor. For validation purpose, moduli were obtained from a newly reconstructed pavement. Resilient moduli conducted with MTS 810 were used to verify the correction factor. There is a good exponential relationship between the pavement layer modulus and the asphalt layer temperature. The temperature correction factor in Shanghai is proposed. Comparisons with other reported temperature correction factor show satisfying agreement, the maximal difference error for two correction factors is 6.788% at the temperatures lower than 20°C. The differences between corrected moduli and measured moduli tested in August and December are 712MPa and 1503 MPa, respectively. The discrepancies between two moduli are due to the FWD test time and test site, and the mechanic states of the field and laboratory test.
机译:落锤挠度计(FWD)挠度是从上海的四处使用中的路面收集的。使用来自所有站点的MODULUS 6.0反计算的模量来得出温度校正因子。为了验证的目的,模量是从新重建的人行道上获得的。使用MTS 810进行的弹性模量用于验证校正系数。路面层模量与沥青层温度之间具有良好的指数关系。提出了上海的温度校正因子。与其他报道的温度校正因子的比较显示出令人满意的一致性,在低于20°C的温度下,两个校正因子的最大差异误差为6.788%。 8月和12月测试的校正模量与实测模量之差分别为712MPa和1503 MPa。两个模量之间的差异是由于FWD测试时间和测试地点以及现场和实验室测试的机械状态引起的。

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