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首页> 外文会议>Eighth International Conference on Low-Volume Roads 2003 Vol.2 Jun 22-25, 2003 Reno, Nevada >Determination of Superpave~(~R) Gyratory Compactor Design Compactive Effort for Cold In-Place Recycled Mixtures
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Determination of Superpave~(~R) Gyratory Compactor Design Compactive Effort for Cold In-Place Recycled Mixtures

机译：冷原地再生混合物Superpave〜（〜R）旋转压实机设计压实强度的确定

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Cold in-place recycling (CIR) is a viable pavement rehabilitation technique that recycles 100% of the reclaimed asphalt pavement (RAP) in place, without the addition of heat. One of the barriers to the use of CIR has been the lack of a suitable mixture design procedure. Researchers at the University of Rhode Island have shown that Super-pave~(~R) mix design technology is applicable to CIR mixtures if the mix design compactive effort [number of compaction revolutions or gyrations (N_(design))] can be established for the Superpave gyratory compactor (SGC). The two objectives of the present project were to determine the mix design compactive effort (N_(design)) with the SGC required to match the field densities of CIR mixtures and to evaluate the effect of sample compaction before and after breaking of the emulsion on the N_(design) compactive effort. RAPs from seven CIR projects were obtained, as was asphalt emulsion from each project. Samples were compacted with the SGC by use of the mix water and emulsion content from the field. The change in density with the number of compaction revolutions was monitored, and the N_(design) required to match the field density was determined. The effects of RAP physical properties, such as RAP gradation, the percentage of flat and elongated particles, aggregate gradation, and angularity, on N_(design) were evaluated. RAP shape, as measured by the percentage of flaky pieces, was found to influence the compacted field density. The N_(design) compactive effort for CIR mix design was also established.
机译：就地冷再生（CIR）是一种可行的路面修复技术，可在不增加热量的情况下就地回收100％的再生沥青路面（RAP）。使用CIR的障碍之一是缺乏合适的混合物设计程序。罗德岛大学的研究人员表明，如果可以确定混合设计的压实强度[压实转数或回转数（N_（design））]，则Super-pave〜（〜R）混合料设计技术可用于CIR混合料。 Superpave旋转压实机（SGC）。本项目的两个目标是确定与CIR混合物的场密度匹配所需的SGC所需的混合物设计压实度（N_（design）），并评估在乳液破乳之前和之后样品压实的效果。 N_（设计）压实工作。获得了七个CIR项目的RAP，每个项目的沥青乳液也是如此。通过使用来自现场的混合水和乳液含量，用SGC压实样品。监测密度随压实转数的变化，并确定与场密度匹配所需的N_（设计）。评估了RAP物理属性（如RAP灰度，扁平颗粒和细长颗粒的百分比，聚集体灰度和棱角）对N_（设计）的影响。发现通过薄片状片的百分比测量的RAP形状影响压实的场密度。还建立了CIR混合料设计的N_（设计）压实效果。

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