Rutting

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Benan Shu - One of the best experts on this subject based on the ideXlab platform.

  • multi stress loading effect on Rutting performance of asphalt mixtures based on wheel tracking testing
    Construction and Building Materials, 2017
    Co-Authors: Barugahare Javilla, Fang Hao, Benan Shu
    Abstract:

    Abstract Wheel tracking testing on AC-20 limestone asphalt mixtures was carried out to determine the effect of multi-stress loading on Rutting development. Rutting rates increased with the application of higher levels of stress, however, they reduced with the subsequent application of lower stresses. The primary densification rates were highest in the first loading phase, after which Rutting development became solely dependent on the secondary Rutting rates. 50 °C was the shift temperature for Rutting development, below which Rutting rates increased linearly, but the increase became exponential at higher temperatures. Heavier loads applied first caused accelerated damage, but their effect was minimised when lighter stresses were applied beforehand. A Rutting index based on a new multi-stress analytical model was proposed, and could be used to evaluate the Rutting performance of mixtures under more realistic loadings.

  • Test evaluation of Rutting performance indicators of asphalt mixtures
    Construction and Building Materials, 2017
    Co-Authors: Barugahare Javilla, Hao Fang, Benan Shu
    Abstract:

    Abstract Rutting indicators of asphalt mixtures were evaluated using wheel tracking testing results of AC-13 and AC-20 asphalt mixtures. A short term Rutting period of 2520 cycles could be adequate for simulating heavy traffic and for prediction of long term Rutting. Secondary Rutting based indicators had higher Rutting correlation coefficients than primary Rutting based indicators (PRBI). The reliability of PRBI indicated that mixtures could be characterised based on primary Rutting. The Rutting at 2 cycles could be used for quick Rutting prediction, but since the earliest recorded cycle was 2, it was hypothesised that even one cycle could as well be equally significant. A/C index, complex stability index and shear index were the most reliable indicators based on validating results of recycled hot mix asphalt mixtures. However, only A/C index could reliably screen mixtures with nearly the same secondary Rutting rates. It was considered the best indicator, which could as well assess the performance of indirect Rutting indicators. Its limiting mixture design values could be determined and validated.

  • Significance of initial Rutting in prediction of Rutting development and characterization of asphalt mixtures
    Construction and Building Materials, 2017
    Co-Authors: Barugahare Javilla, Fang Hao, Benan Shu
    Abstract:

    Abstract Wheel tracking testing on AC-20 limestone and AC-13 basalt asphalt mixtures was carried out to investigate the significance of initial Rutting in prediction of Rutting development and characterization of asphalt mixtures. Stress, temperature and moisture affected Rutting, however, the effect of temperature and stress on Rutting became significant at temperatures higher than 50 °C and loading cycles greater than 1000. Short-term and long-term Rutting development could well be predicted from initial Rutting values using linear and exponential functions respectively, with 1000 cycles considered the shift loading cycles for Rutting prediction. Threshold initial Rutting values for mixture characterization were determined based on past studies and JTG E20-2011 standard. They were validated using wheel tracking results of AC-25 recycled hot mix asphalt and AC-20 mixtures under water immersion, and could thus be used for quick Rutting prediction and mixture optimization.

Barugahare Javilla - One of the best experts on this subject based on the ideXlab platform.

  • multi stress loading effect on Rutting performance of asphalt mixtures based on wheel tracking testing
    Construction and Building Materials, 2017
    Co-Authors: Barugahare Javilla, Fang Hao, Benan Shu
    Abstract:

    Abstract Wheel tracking testing on AC-20 limestone asphalt mixtures was carried out to determine the effect of multi-stress loading on Rutting development. Rutting rates increased with the application of higher levels of stress, however, they reduced with the subsequent application of lower stresses. The primary densification rates were highest in the first loading phase, after which Rutting development became solely dependent on the secondary Rutting rates. 50 °C was the shift temperature for Rutting development, below which Rutting rates increased linearly, but the increase became exponential at higher temperatures. Heavier loads applied first caused accelerated damage, but their effect was minimised when lighter stresses were applied beforehand. A Rutting index based on a new multi-stress analytical model was proposed, and could be used to evaluate the Rutting performance of mixtures under more realistic loadings.

  • Test evaluation of Rutting performance indicators of asphalt mixtures
    Construction and Building Materials, 2017
    Co-Authors: Barugahare Javilla, Hao Fang, Benan Shu
    Abstract:

    Abstract Rutting indicators of asphalt mixtures were evaluated using wheel tracking testing results of AC-13 and AC-20 asphalt mixtures. A short term Rutting period of 2520 cycles could be adequate for simulating heavy traffic and for prediction of long term Rutting. Secondary Rutting based indicators had higher Rutting correlation coefficients than primary Rutting based indicators (PRBI). The reliability of PRBI indicated that mixtures could be characterised based on primary Rutting. The Rutting at 2 cycles could be used for quick Rutting prediction, but since the earliest recorded cycle was 2, it was hypothesised that even one cycle could as well be equally significant. A/C index, complex stability index and shear index were the most reliable indicators based on validating results of recycled hot mix asphalt mixtures. However, only A/C index could reliably screen mixtures with nearly the same secondary Rutting rates. It was considered the best indicator, which could as well assess the performance of indirect Rutting indicators. Its limiting mixture design values could be determined and validated.

  • Significance of initial Rutting in prediction of Rutting development and characterization of asphalt mixtures
    Construction and Building Materials, 2017
    Co-Authors: Barugahare Javilla, Fang Hao, Benan Shu
    Abstract:

    Abstract Wheel tracking testing on AC-20 limestone and AC-13 basalt asphalt mixtures was carried out to investigate the significance of initial Rutting in prediction of Rutting development and characterization of asphalt mixtures. Stress, temperature and moisture affected Rutting, however, the effect of temperature and stress on Rutting became significant at temperatures higher than 50 °C and loading cycles greater than 1000. Short-term and long-term Rutting development could well be predicted from initial Rutting values using linear and exponential functions respectively, with 1000 cycles considered the shift loading cycles for Rutting prediction. Threshold initial Rutting values for mixture characterization were determined based on past studies and JTG E20-2011 standard. They were validated using wheel tracking results of AC-25 recycled hot mix asphalt and AC-20 mixtures under water immersion, and could thus be used for quick Rutting prediction and mixture optimization.

Maureen Jense - One of the best experts on this subject based on the ideXlab platform.

  • local calibration of mechanistic empirical pavement design guide Rutting model minnesota road research project test sections
    Transportation Research Record, 2010
    Co-Authors: Kyle Hoegh, Lev Khazanovich, Maureen Jense
    Abstract:

    The AASHTO interim Mechanistic-Empirical Pavement Design Guide (MEPDG) was recently introduced in the United States. Many state agencies have conducted validation and local calibration of the MEPDG performance prediction models. In this study, time history Rutting performance data for pavement sections at the Minnesota Department of Transportation full-scale pavement research facility [Minnesota Road Research Project (MnROAD)] have been used for an evaluation and local calibration of the MEPDG Rutting model. A detailed comparison of the predicted total Rutting, asphalt layer Rutting, and measured Rutting is presented. The reason that a conventional MEPDG model calibration was not feasible is discussed. Also, a modification of the Rutting model is recommended. It was found that the locally calibrated model greatly improved the MEPDG Rutting prediction for various pavement designs in MnROAD conditions.

Weizheng Liu - One of the best experts on this subject based on the ideXlab platform.

  • a review on solutions for improving Rutting resistance of asphalt pavement and test methods
    Construction and Building Materials, 2018
    Co-Authors: Jiaqi Chen, Zheng Han, Weizheng Liu
    Abstract:

    Abstract Permanent deformation, mainly referring to Rutting, is one of the main distress modes of asphalt pavement. Exploring effective methods to mitigate the Rutting distress is of great significance for providing a long-life and safe road. The Rutting solutions were first reviewed. It was found that the efforts from academic and engineering industries focused on enhancing the rheological properties of asphalt binder by adding modifying powder, fiber or mixture into binder or mixture, as well as strengthening aggregate interlock and applying novel pavement structure. Semi-flexible asphalt pavement was suggested to be a promising method to fight the Rutting distress, because it has a high mechanical property without scarifying the flexibility of asphalt pavement. In order to consider the influence of temperature on Rutting occurrence, cool asphalt pavements, especially heat-transfer induced structures, were reviewed and deemed to be a new strategy for reducing Rutting susceptibility of asphalt pavement. In order to evaluate the effectiveness of above Rutting solutions, many tests, such as multi-stress creep recovery test for asphalt binder and wheel tracking test for asphalt mixture, were reviewed. By linking the reported results of wheel tracking test with high-temperature Rutting mechanism it was advised to develop a test method that could reproduce the real field pavement environment, including multiple stress mode, temperature gradient control system and pavement structure, to assess the Rutting response of asphalt mixture. This review is expected to provide an overall insight on the existing Rutting solutions and test methods, and recommend future studying areas relevant to Rutting distress.

Kyle Hoegh - One of the best experts on this subject based on the ideXlab platform.

  • local calibration of mechanistic empirical pavement design guide Rutting model minnesota road research project test sections
    Transportation Research Record, 2010
    Co-Authors: Kyle Hoegh, Lev Khazanovich, Maureen Jense
    Abstract:

    The AASHTO interim Mechanistic-Empirical Pavement Design Guide (MEPDG) was recently introduced in the United States. Many state agencies have conducted validation and local calibration of the MEPDG performance prediction models. In this study, time history Rutting performance data for pavement sections at the Minnesota Department of Transportation full-scale pavement research facility [Minnesota Road Research Project (MnROAD)] have been used for an evaluation and local calibration of the MEPDG Rutting model. A detailed comparison of the predicted total Rutting, asphalt layer Rutting, and measured Rutting is presented. The reason that a conventional MEPDG model calibration was not feasible is discussed. Also, a modification of the Rutting model is recommended. It was found that the locally calibrated model greatly improved the MEPDG Rutting prediction for various pavement designs in MnROAD conditions.