A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Resilient Modulus and the Fatigue Properties of Kansas Hot Mix Asphalt Mixes
This research study aimed to determine the dynamic modulus, bending stiffness and fatigue properties of four representative Superpave HMA mixtures used in the construction of base layers of Kansas flexible pavements and to compare the measured values with those predicted by the NCHRP Design Guide. To achieve these objectives, asphalt concrete beams were tested in third point-bending at constant strain, at four temperatures and four levels of strain. Dynamic resilient modulus tests were performed on asphalt cylindrical specimens at five temperatures and five loading frequencies. Multi-linear regression analysis was performed to develop a linear relationship between the bending stiffness and the fatigue life for the asphalt mixes tested. It was found that the dynamic modulus is not a good indicator of the fatigue performance of HMA mixes. At all temperatures and strain levels, the mix containing SBS polymer modified binder had a much longer fatigue life while having similar dynamic moduli with those of mixes with unmodified binders.
Resilient Modulus and the Fatigue Properties of Kansas Hot Mix Asphalt Mixes
This research study aimed to determine the dynamic modulus, bending stiffness and fatigue properties of four representative Superpave HMA mixtures used in the construction of base layers of Kansas flexible pavements and to compare the measured values with those predicted by the NCHRP Design Guide. To achieve these objectives, asphalt concrete beams were tested in third point-bending at constant strain, at four temperatures and four levels of strain. Dynamic resilient modulus tests were performed on asphalt cylindrical specimens at five temperatures and five loading frequencies. Multi-linear regression analysis was performed to develop a linear relationship between the bending stiffness and the fatigue life for the asphalt mixes tested. It was found that the dynamic modulus is not a good indicator of the fatigue performance of HMA mixes. At all temperatures and strain levels, the mix containing SBS polymer modified binder had a much longer fatigue life while having similar dynamic moduli with those of mixes with unmodified binders.
Resilient Modulus and the Fatigue Properties of Kansas Hot Mix Asphalt Mixes
S. A. Romanoschi (author) / N. I. Dumitru (author) / O. Dumitru (author)
2006
143 pages
Report
No indication
English
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