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首页> 美国政府科技报告 >Investigation of Warm Mix Asphalt (WMA) Technologies and Increased Percentages of Reclaimed Asphalt Pavement (RAP) in Asphalt Mixtures.
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Investigation of Warm Mix Asphalt (WMA) Technologies and Increased Percentages of Reclaimed Asphalt Pavement (RAP) in Asphalt Mixtures.

机译：研究暖拌沥青（Wma）技术和沥青混合料中再生沥青路面（Rap）的百分比增加。

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The objective of this research project was three-fold: (1).evaluate the performance of SCDOT mixtures made with WMA technologies, (2) evaluate the effect of increased RAP contents on SCDOT asphalt mixtures, and (3) evaluate the influence of WMA technologies on SCDOT asphalt mixtures made with RAP. To accomplish the research objectives, the research was divided in to three separate phases, each addressing one of the three specific objectives. Additionally, an extensive literature review was conducted to establish the state-of-the-practice related to the use of WMA and RAP in asphalt mixtures. The effects of WMA technologies and RAP content on asphalt mixtures were evaluated for binders and mixtures. Two different WMA technologies (Evotherm and foaming) and five RAP contents (0, 20, 30, 40, and 50%) were selected for this study. SCDOT Surface Type B mix designs were conducted for HMA and each WMA technology using two binders and two aggregates for a total of 60 mix designs. Once the mix designs were complete, the performance of each mixture was determined by testing the indirect tensile strength, tensile strength ratio, rutting resistance, resilient modulus, and fatigue life. In addition, the effect of the WMA technologies on the relative compactibiliy of the mixtures was also quantified as the number of gyrations required to achieve the specified height of 95 mm for the ITS specimens. This research yielded several conclusions and recommendations for the implementation of WMA and higher RAP contents in SCDOT asphalt paving operations.

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