Walubita, LFFaruk, ANMZhang, JKomba, Julius JAlrashydah, EISimate, GS2020-08-182020-08-182019-04Walubita, L.F., Faruk, A.N.M., Zhang, J. et al. 2019. The Hamburg Rutting Test (HWTT) alternative data analysis methods and HMA screening criteria. International Journal of Pavement Research and Technology, vol 12, pp. 110–1161996-68141997-1400https://doi.org/10.1007/s42947-019-0014-3https://link.springer.com/article/10.1007%2Fs42947-019-0014-3http://hdl.handle.net/10204/11537Copyright: 2019 Springer Nature. The attached pdf contains the preprint version of the published item.The Hamburg Wheel Tracking Test (HWTT) is a widely used routine laboratory test for identifying and screening hot-mix asphalt (HMA) mixes that are prone to rutting. The standard HMA pass-fail screening criterion under the current HWTT protocol is 12.5 mm rutting at 50°C. However, Texas has experienced record high summer temperatures in the recent years (i.e., over 122°F), and several rutting failures have occurred in the field with some surface HMA mixes that had passed the HWTT in the laboratory. These failures occurred mostly in high shear-stress locations, in particular with slow moving (accelerating/decelerating) traffic at controlled highway intersections, stop-go sections, in areas of elevated temperatures, heavy/high traffic loading, and/or where lower performance grade (PG) of asphalt binders have been used. This laboratory hybrid study was thus initiated to explore new data analysis methods and introduce new alternative rutting parameters to supplement the traditional HWTT pass-fail screening criteria (= 12.5 mm rut depth at 50°C) for surface HMA mixes. Several HMA mixes commonly used in Texas were evaluated in the laboratory and new HWTT analysis parameters, such as the rutting area ( A), the normalized rutting area (Rut ), and the shape factor (SF) with the potential to capture the HMA rutting path-history, were formulated. In addition, a comparison between the newly formulated and traditional rutting parameters with field performance observations was conducted and yielded plausible results in terms of predicting the early-life rutting performance of HMA mixes.enHamburg Wheel Tracking TestHWTTHot-mix asphaltHMAArticleWalubita, L., Faruk, A., Zhang, J., Komba, J. J., Alrashydah, E., & Simate, G. (2019). The Hamburg Rutting Test (HWTT) alternative data analysis methods and HMA screening criteria. http://hdl.handle.net/10204/11537Walubita, LF, ANM Faruk, J Zhang, Julius J Komba, EI Alrashydah, and GS Simate "The Hamburg Rutting Test (HWTT) alternative data analysis methods and HMA screening criteria." (2019) http://hdl.handle.net/10204/11537Walubita L, Faruk A, Zhang J, Komba JJ, Alrashydah E, Simate G. The Hamburg Rutting Test (HWTT) alternative data analysis methods and HMA screening criteria. 2019; http://hdl.handle.net/10204/11537.TY - Article AU - Walubita, LF AU - Faruk, ANM AU - Zhang, J AU - Komba, Julius J AU - Alrashydah, EI AU - Simate, GS AB - The Hamburg Wheel Tracking Test (HWTT) is a widely used routine laboratory test for identifying and screening hot-mix asphalt (HMA) mixes that are prone to rutting. The standard HMA pass-fail screening criterion under the current HWTT protocol is 12.5 mm rutting at 50°C. However, Texas has experienced record high summer temperatures in the recent years (i.e., over 122°F), and several rutting failures have occurred in the field with some surface HMA mixes that had passed the HWTT in the laboratory. These failures occurred mostly in high shear-stress locations, in particular with slow moving (accelerating/decelerating) traffic at controlled highway intersections, stop-go sections, in areas of elevated temperatures, heavy/high traffic loading, and/or where lower performance grade (PG) of asphalt binders have been used. This laboratory hybrid study was thus initiated to explore new data analysis methods and introduce new alternative rutting parameters to supplement the traditional HWTT pass-fail screening criteria (= 12.5 mm rut depth at 50°C) for surface HMA mixes. Several HMA mixes commonly used in Texas were evaluated in the laboratory and new HWTT analysis parameters, such as the rutting area ( A), the normalized rutting area (Rut ), and the shape factor (SF) with the potential to capture the HMA rutting path-history, were formulated. In addition, a comparison between the newly formulated and traditional rutting parameters with field performance observations was conducted and yielded plausible results in terms of predicting the early-life rutting performance of HMA mixes. DA - 2019-04 DB - ResearchSpace DP - CSIR KW - Hamburg Wheel Tracking Test KW - HWTT KW - Hot-mix asphalt KW - HMA LK - https://researchspace.csir.co.za PY - 2019 SM - 1996-6814 SM - 1997-1400 T1 - The Hamburg Rutting Test (HWTT) alternative data analysis methods and HMA screening criteria TI - The Hamburg Rutting Test (HWTT) alternative data analysis methods and HMA screening criteria UR - http://hdl.handle.net/10204/11537 ER -