Evaluation of Asphalt Mixtures Containing Renewable Binder Technologies

10.6135/ijprt.org.tw/2013.6(5).570

Samuel B. Cooper III；Louay N. Mohammad；Mostafa Elseifi

Bio-binder ； HMA ； Sustainability ； WMA

International Journal of Pavement Research and Technology

6卷5期（2013 / 09 / 01）

570 - 575

英文

Recently, the use of bio-oil as a replacement to petroleum-based asphalt binder has been proposed. The objective of this study was to conduct a comprehensive laboratory evaluation of asphalt mixtures containing green asphalt technology. To achieve this objective, a suite of laboratory tests was conducted to capture the mechanistic behavior of the mixtures against major distresses. Laboratory testing evaluated the rutting performance, moisture resistance, and fracture resistance of the produced mixtures using the Hamburg loaded-wheel tester, the modified Lottman test, and the semi-circular bending (SCB) test. Results of the experimental program showed mixtures modified with bio-binder had similar or improved rutting performance when compared to the conventional mixes. With respect to moisture susceptibility, all mixtures, except the mixes prepared with PG 64-22, exceeded the 80% tensile strength ratio. However, when an anti-stripping agent was added, the tensile strength ratio of the mix with 50% bio-binder exceeded 80%. With respect to fracture resistance at intermediate temperatures, the mixes containing bio-binder exhibited reduced fracture resistance as compared to conventional mixes.