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首页> 外文会议>Transportation Research Board Annual meeting >A Comparison of Virgin and Recycled Asphalt Pavements Using Long-Term Pavement Performance SPS-5 Data
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A Comparison of Virgin and Recycled Asphalt Pavements Using Long-Term Pavement Performance SPS-5 Data

机译：使用长期路面性能SPS-5数据比较原生沥青路面和再生沥青路面

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The Specific Pavement Studies 5 (SPS-5) in the Long Term Pavement Performance (LTPP)program was designed to study the effects of overlay rehabilitation type on typical distressmeasures. The different rehabilitation treatments compared overlay thickness, overlay type, andsurface preparation prior to rehabilitation. The two thicknesses used were 50 mm and 125 mmoverlays. The two overlay types were virgin asphalt mix and recycled asphalt containingapproximately 30% reclaimed asphalt pavement (RAP). Surface preparation consisted of eithermilling or not milling the existing pavement prior to rehabilitation. Eighteen states andprovinces in North America built SPS-5 projects between 1989 and 1998. Seven distressparameters from these test pavements were analyzed, including International Roughness Index(IRI), rutting, fatigue cracking, longitudinal cracking, transverse cracking, block cracking, andraveling. Analyses were conducted to determine which factors affected overlay performance asmeasured with the above parameters. Further statistical testing compared the performance of thevirgin mix sections directly to equivalent sections containing 30% RAP. Overlays with mixescontaining 30 percent RAP were found to perform as well as overlays with virgin mixes in termsof IRI, rutting, block cracking, and raveling. It was also determined that thicker overlaysimproved pavement performance except for rutting, and milling prior to rehabilitation decreasedIRI, fatigue cracking, and transverse cracking but increased rutting.
机译：长期路面性能（LTPP）中的特定路面研究5（SPS-5） 该程序旨在研究覆盖康复类型对典型窘迫的影响 措施。不同的康复治疗方法比较了覆盖层的厚度，覆盖层的类型和 康复前的表面准备。所使用的两种厚度分别为50毫米和125毫米 叠加层。两种铺面类型是原始沥青混合料和含再生沥青的混合料。 约30％的再生沥青路面（RAP）。表面处理包括以下任何一种 在修复之前对现有路面进行铣刨或不铣刨。十八个州和 1989年至1998年，北美各省建立了SPS-5项目。 分析了这些测试路面的参数，包括国际粗糙度指数 （IRI），车辙，疲劳开裂，纵向开裂，横向开裂，块状开裂和 闲逛。进行分析以确定哪些因素会影响覆盖效果 用以上参数测量。进一步的统计测试比较了 原始混合部分直接转换为包含30％RAP的等效部分。混合覆盖 发现包含30％RAP的效果与原始混合效果相同 IRI，车辙，块裂和断裂。还确定了较厚的覆盖层 除车辙外，路面性能得到改善，并且修复前的碾磨减少了 IRI，疲劳裂纹和横向裂纹，但车辙增加。

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