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Results of Integrating Simple Performance Tests and Environmental Conditioning System

机译：简单性能测试与环境调节系统集成的结果

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Under the guidance of the Strategic Highway Research Program, an environmental conditioning system (ECS) was developed to simulate field conditions to identify the moisture sensitivity of asphalt concrete mixes. However, the system was not included in Superpave~® because of poor repeatability. Studies conducted at the University of Texas at El Paso improved the prediction capabilities of the conditioning system. The modified system uses resilient modulus as a moisture sensitivity indicator. Resilient modulus has been commonly used by highway practitioners as an indicator of hot-mix asphalt concrete performance. However, as an extension to the Superpave system, under NCHRP Project 9-19, researchers have proposed simple tests to evaluate the performance of asphalt concrete. These tests are referred to as dynamic modulus, flow number, and flow time. The objective of this study was to evaluate the potential of these tests, when integrated with an ECS, to predict moisture damage in lieu of the resilient modulus. Three mixes of known performance were selected and conditioned by using a conditioning procedure of the modified system. The simple performance tests were done on unconditioned as well as ECS-conditioned specimens. The integration results indicate that the flow number and flow time tests, as conducted during this study, do not have the potential to replace resilient modulus in ECS for identification of moisture-susceptible asphalt concrete in the present form. However, the dynamic modulus test demonstrated their potential as a performance indicator replacing the resilient modulus test. The results of the integration efforts are presented here.
机译：在战略公路研究计划的指导下，开发了一种环境调节系统（ECS）以模拟田间条件，以识别沥青混凝土混合物的湿度敏感性。但是，由于可重复性差，该系统未包含在Superpave®中。在德克萨斯大学埃尔帕索分校进行的研究提高了空调系统的预测能力。修改后的系统使用弹性模量作为湿度敏感性指标。弹性模量已被公路从业人员普遍用作热拌沥青混凝土性能的指标。但是，作为Superpave系统的扩展，在NCHRP项目9-19下，研究人员提出了一些简单的测试来评估沥​​青混凝土的性能。这些测试称为动态模量，流量和流量时间。这项研究的目的是评估与ECS集成时这些测试的潜力，以预测水分破坏来代替弹性模量。选择三种性能已知的混合物，并使用改良系统的调节程序进行调节。简单的性能测试是在无条件的和ECS条件的样品上进行的。综合结果表明，在这项研究中进行的流量和流量时间测试无法取代ECS中的弹性模量，从而无法识别目前形式的易受潮沥青混凝土。但是，动态模量测试证明了它们作为代替弹性模量测试的性能指标的潜力。集成工作的结果在此处显示。

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