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首页> 外文会议>Airfield and Highway Pavement Specialty Conference; 20060430-0503; Atlanta,GA(US) >A PERFORMANCE BASELINE FOR STONE-MATRIX ASPHALT
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A PERFORMANCE BASELINE FOR STONE-MATRIX ASPHALT

机译：石基沥青的性能基准

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In 2003, Virginia launched an expanded commitment to stone-matrix asphalt (SMA). By the end of 2004, contracts that encompassed nearly 400,000 tons of SMA had been awarded for this two-year period. This paper documents many aspects of Virginia's 2003/2004 SMA "implementation initiative." It summarizes and presents detailed information on costs and quantities, volumetric properties, compaction, permeability, and initial functional characteristics (ride & friction) for SMA pavements placed during the two-year timeframe. The data presented in this work will be used to form the baseline for future pavement and material evaluations. Among the significant findings and conclusions are the higher initial costs for SMA, $10 to $20 per ton more than for the nearest equivalent dense-graded surface mixes. Further, the average daily production of SMA was approximately 900 tons, although as much as 1,500 tons per day (night) appeared achievable for nearly every mix (with "typical" project constraints). The SMA surface mixes had generally good (i.e., low) permeability characteristics, and production compaction results were generally within specification limits. In addition, the achieved smoothness levels for SMA improved slightly from 2003 to 2004. Finally, early-age friction improved rapidly under traffic for SMA. Then, the SMA tended to exhibit prototypical seasonal variation for friction, with the lowest test results in the summer months. Building on these findings, anticipated follow-up research will examine the economic differences between SMA and Superpave® in more detail. Additional research to monitor functional characteristics over time and to support selection and use criteria for SMA is also recommended.
机译：2003年，弗吉尼亚州开始对石基沥青（SMA）做出扩展承诺。到2004年底，为期两年的合同授予了近40万吨SMA。本文记录了弗吉尼亚州2003/2004 SMA“实施计划”的许多方面。它总结并提供了有关在两年时间内铺设的SMA路面的成本和数量，体积特性，压实度，渗透性和初始功能特性（骑乘和摩擦）的详细信息。这项工作中提供的数据将被用作未来路面和材料评估的基准。在重要的发现和结论中，SMA的初始成本较高，比最接近的同等密度梯度表面混合物高10至20美元/吨。此外，SMA的平均日产量约为900吨，尽管对于几乎每种混合物而言，每天（每晚）多达1500吨（具有“典型”项目约束）看来都是可以实现的。 SMA表面混合物通常具有良好的（即，低）渗透性特征，并且生产压实结果通常在规格范围内。此外，SMA的平滑度从2003年到2004年略有改善。最后，SMA流量下的早期摩擦迅速改善。然后，SMA倾向于表现出典型的摩擦季节性变化，在夏季月份测试结果最低。基于这些发现，预期的后续研究将更详细地研究SMA和Superpave®之间的经济差异。还建议进行其他研究，以随时间监视功能特性并支持SMA的选择和使用标准。

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