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Evaluation of asphalt mixture behavior incorporating warm mix additives and reclaimed asphalt pavement

Journal of Traffic and Transportation Engineering(English Edition) 2018年第3期5卷 181-196页

作者： Seyed Reza Omranian Meor Othman Hamzah lillian gungat Sek Yee Teh School of Civil Engineering Universiti Sains Malaysia Engineering Campus Civil Engineering Programme Faculty of Engineering Universiti Malaysia Sabah

Incorporation of warm mix asphalt （WMA） and reclaimed asphalt pavement （RAP） has benefited the asphalt industry in many ways such as reducing the demand for virgin materials, lowering energy requirement during the asphalt production and construction, in addition to reducing greenhouse-gas emissions. This study evaluated the effects of Evotherm and RH-WMA and RAP on mixtures＇ behavior in terms of the compaction energy index （CEI）, indirect tensile strength （ITS） and resilient modulus. The results showed that warm mix additives reduced the CEI, ITS and resilient modulus; while RAP increased the corresponding values. Statistical analysis showed that mixtures incorporating Evotherm and RAP had significant effects on CEI, while the effects of RH-WMA on the corresponding value were found to be statistically insignificant. General Linear Model showed that Evotherm, RAP and RH-WMA exhibited no significant effects on the ITS and resilient modulus. The one-way analysis of variance showed that Evotherm influenced mixture behavior significantly, while RAP and RH-WMA effects were found to be statistically insignificant. Regression equations with high accuracy levels were proposed to predict CEI, ITS and resilient modulus with respect to modification of mixture variables such as mix constituents （Evotherm, RH-WMA, and RAP） and compaction temperature.

关键词： Warm mix asphalt Reclaimed asphalt pavement Workability Compaction energy index Indirect tensile strength Resilient modulus

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