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Evaluation of Long-Lasting Perpetual Asphalt Pavement Using Life-Cycle Cost Analysis

机译:生命周期成本分析法评估永久性永久沥青路面

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In 2006, the Oklahoma Department of Transportation (OKDOT) sponsored work at the NationalCenter for Asphalt Technology (NCAT) Pavement Test Track to compare the performance oftwo sections that were designed to determine the thickness required to obtain a perpetualpavement. One section (Section N9) was designed to be a perpetual pavement (14 inches thick)and the thickness of the other section was reduced to 10 inches (based on AASHTO 1993 designguide) to see how well it performed and to help identify the thickness needed for a perpetualpavement. This paper presents a life-cycle cost analysis (LCCA) to quantify the benefits ofbuilding the perpetual pavement section compared to the long term cost of the thinner section.LCCA was conducted using RealCost 2.5, which is available through FHWA, to determinequantitative estimates of construction schedule, work zone user costs, and agency costs for initialconstruction and rehabilitation activities. The perpetual pavement section was found to have alower life-cycle cost than the conventional pavement section and provide better service tohighway users. Furthermore, to help better planning for future preservation study the estimatedpresent serviceability rating (PSR) as a function of international roughness index (IRI) for twodifferent designs (perpetual and non-perpetual) was carefully evaluated. The findings of surfacemeasurements for both sections clearly demonstrate a difference between perpetual andconventional pavement serviceability for a given level of roughness and accumulated traffic.These results are also helpful to assess the improvement of conventional pavement after eachrehabilitation treatments.
机译:2006年,俄克拉荷马州交通运输部(OKDOT)赞助了国家 沥青技术中心(NCAT)路面测试轨迹,以比较路面的性能 设计两个部分来确定获得永久性所需的厚度 路面。一节(第N9节)被设计为永久性路面(14英寸厚) 并且另一部分的厚度减小到10英寸(基于AASHTO 1993设计 指南),以查看其效果如何,并帮助确定永久涂层所需的厚度 路面。本文提出了生命周期成本分析(LCCA),以量化 与较薄部分的长期成本相比,建造永久性人行道部分。 LCCA使用可通过FHWA获得的RealCost 2.5进行,以确定 初步估算施工进度,工作区用户成本和代理成本 建设和恢复活动。发现永久路面部分有一个 与传统的人行道相比,降低了生命周期成本,并提供了更好的服务 高速公路使用者。此外,为了帮助更好地计划未来的保存,请研究估计的 当前的可维修性等级(PSR)与两个国家的国际粗糙度指数(IRI)的关系 仔细评估了不同的设计(永久性和非永久性)。表面的发现 这两个部分的测量值清楚地表明了永久性和永久性之间的区别 在给定的粗糙度和累积交通量的情况下,传统的路面可使用性。 这些结果也有助于评估每次使用后传统铺装的改善情况。 康复治疗。

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