- 期刊
Determining Mixing and Compaction Temperatures of Evotherm Warm Mix Asphalt Using 100% Reclaimed Asphalt Pavement
並列摘要
Laboratory viscosity testing of asphalt binder and compaction testing of asphalt mixture were performed to develop a rational method for determining mixing and compaction temperatures of warm mix asphalt (WMA) using 100% reclaimed asphalt pavement (RAP), RAP-WMA, with Evotherm DAT technology. Results of laboratory tests and analyses of the results indicate that traditional equiviscous principle is not applicable to the RAP-WMA. Compared with RAP hot mix asphalt (HMA), RAP-HMA, the reductions in mixing and compaction temperatures of RAP-WMA determined using the equiviscous principle are only less than 1°C. An equivolumetric principle can be used for determining average compaction temperature of RAP-WMA, which is defined as the temperature corresponding to a prescribed value of air voids of asphalt mixture. A method, termed ＂equi-viscous-volumetric principle,＂ developed in this study, can be used for determining mixing and compaction temperatures of RAP-WMA, which is a combination of the equiviscous principle and the equivolumetric principle. Compared with RAP-HMA, the reductions in mixing and compaction temperatures of RAP-WMA determined using this method are around 25°C. These reductions are close to the values recommended by the Evotherm DAT additive manufacturer and used in paving practice.
延伸閱讀
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