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Evaluation of foamed warm mix asphalt with reclaimed asphalt pavement: field and laboratory experiments

机译：用再生沥青路面评估泡沫热拌沥青：现场和实验室实验

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摘要

Warm mix asphalt (WMA) technology and reclaimed asphalt pavement (RAP) materials have been increasingly used in asphalt paving mixtures due to environmental and cost benefits. Combining WMA and RAP offers more economic and environmental benefits compared to using either alone. To evaluate the combined effect of WMA and RAP, two WMA mixtures with 20% and 30% RAP were produced using water-injection plant foaming, and they were compared with two comparable hot-mix asphalt (HMA) mixtures with 20% and 30% RAP. The four mixtures were paved on I-70 near Eagle, Colorado in May 2013. Laboratory performance properties of plant-produced mixes and field performance of the four test sections after 13, 25, 38 months were evaluated. The research results showed that the effect of water foaming WMA and RAP was not significant on the laboratory performance properties, construction quality and field performance. Thus, water-injection plant foaming WMA could be used to produce WMA mixtures with 20% and 30% RAP at a lower production temperature. These sections will continue to be monitored to evaluate their long-term performance and compare with the laboratory test results.
机译：由于环保和成本优势，温拌沥青（WMA）技术和再生沥青路面（RAP）材料已越来越多地用于沥青路面混合物中。与单独使用WMA和RAP相比，将WMA和RAP结合使用可提供更多的经济和环境效益。为了评估WMA和RAP的组合效果，使用注水设备发泡法生产了两种RAP分别为20％和30％的WMA混合物，并将它们与两种可比较的20％和30％的热混合沥青（HMA）混合物进行比较说唱四种混合物于2013年5月在科罗拉多州伊格尔附近的I-70路面上铺设。评估了13、25、38个月后植物产生的混合物的实验室性能和四个测试部分的田间性能。研究结果表明，水发泡WMA和RAP对实验室性能，施工质量和现场性能影响不大。因此，注水工厂发泡WMA可用于在较低的生产温度下生产RAP为20％和30％的WMA混合物。这些部分将继续受到监控，以评估其长期性能并与实验室测试结果进行比较。

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