Evaluation of asphalt mixture behavior incorporating warm mix additives and reclaimed asphalt pavement
Evaluation of asphalt mixture behavior incorporating warm mix additives and reclaimed asphalt pavement
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DOI：
10.1016/j.jtte.2017.08.003
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发表时间：
2018-06
期刊：
影响因子：
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通讯作者：
S. R. Omranian;M. O. Hamzah;L. Gungat;S. Y. Teh
中科院分区：
文献类型：
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作者：
S. R. Omranian;M. O. Hamzah;L. Gungat;S. Y. Teh
温拌沥青(WMA)和再生沥青路面(RAP)的结合使沥青工业在许多方面受益，如减少对原始材料的需求，降低沥青生产和施工过程中的能源需求，以及减少温室气体排放。本研究从压实能指数(CEI)、间接拉伸强度(ITS)和回弹模数等方面评价了Evotherm®、RH-WMA和RAP对混合料性能的影响。结果表明，温拌添加剂降低了CEI、ITS和回弹模量值，而RAP则增加了相应的值。统计分析表明，加入Evotherm®和RAP的混合物对CEI有显著影响，而RH-WMA对相应值的影响在统计学上不显著。一般线性模型显示，Evotherm®、RAP和RH-WMA对ITS和回弹模数没有显著影响。单因素方差分析表明，Evotherm®显著影响混合物的行为，而RAP和RH-WMA的影响在统计学上并不显著。提出了具有高精度水平的回归方程，用于预测CEI、ITS和回弹模数与混合变量的修改，例如混合组分(Evotherm®、RH-WMA和RAP)和压实温度。
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.