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Laboratory Evaluation of Asphalt Mixtures Containing Bio-Binder Technologies
The use of bio-binder as a replacement to petroleum-based asphalt binders has received considerable attention in recent years. The objective of this study was to conduct a comprehensive laboratory evaluation of asphalt mixtures containing bio-binder technology at a content of 20, 25.5, 30, and 50%. 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, the semi-circular bending (SCB) test, and the thermal stress restrained specimen (TSRST) test. Results of the experimental program showed that mixtures modified with bio-binder had similar or improved rutting performance when compared with the conventional mixes. With respect to moisture susceptibility, all mixtures, except the mixes prepared with PG 67-22, exceeded the 80% tensile strength ratio. Mixtures containing bio-binder exhibited reduced fracture resistance as compared with conventional mixes. Bio-binder modification improved the low temperature fracture performance of the mixtures when compared with conventional mixtures of similar performance grade.
Laboratory Evaluation of Asphalt Mixtures Containing Bio-Binder Technologies
The use of bio-binder as a replacement to petroleum-based asphalt binders has received considerable attention in recent years. The objective of this study was to conduct a comprehensive laboratory evaluation of asphalt mixtures containing bio-binder technology at a content of 20, 25.5, 30, and 50%. 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, the semi-circular bending (SCB) test, and the thermal stress restrained specimen (TSRST) test. Results of the experimental program showed that mixtures modified with bio-binder had similar or improved rutting performance when compared with the conventional mixes. With respect to moisture susceptibility, all mixtures, except the mixes prepared with PG 67-22, exceeded the 80% tensile strength ratio. Mixtures containing bio-binder exhibited reduced fracture resistance as compared with conventional mixes. Bio-binder modification improved the low temperature fracture performance of the mixtures when compared with conventional mixtures of similar performance grade.
Laboratory Evaluation of Asphalt Mixtures Containing Bio-Binder Technologies
Mohammad, Louay N. (author) / Elseifi, Mostafa (author) / Cooper, Samuel B. (author) / Challa, Harshavardhan (author) / Naidoo, Prem (author)
2013
25 Seiten, Bilder, Tabellen, Quellen
Conference paper
English
Laboratory Evaluation of Asphalt Mixtures Containing Sustainable Technologies
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Laboratory Evaluation of Asphalt Mixtures That Contain Biobinder Technologies
| British Library Online Contents | 2013