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首页> 外文期刊>Transportation Research Record >Performance-Based Fracture Criterion for Evaluation of Moisture Susceptibility in Hot-Mix Asphalt
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Performance-Based Fracture Criterion for Evaluation of Moisture Susceptibility in Hot-Mix Asphalt

机译：基于性能的断裂准则用于热拌沥青中水分敏感性的评估

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摘要

The laboratory testing procedures currently available for testing hot-mix asphalt moisture susceptibility all evaluate the effects of moisture damage in the laboratory by measuring the relative change of a single parameter before and after conditioning (i.e., tensile strength ratio, resilient modulus ratio). The use of a single parameter to evaluate moisture damage must be questioned. Instead, a single unified framework that accounts for changes in key mixture properties is needed to evaluate the effects of moisture damage in mixtures effectively. The use of a new performance-based fracture parameter, the energy ratio (ER), for quantifying the effects of moisture damage on the fracture resistance of mixtures is evaluated here. ER is used to determine the effects of moisture damage on changes in the fracture resistance of six granite mixtures prepared with and without the use of an antistripping additive. The granite aggregate used is a known stripping aggregate. In addition, one limestone mixture with a known high resistance to stripping was used. The results indicate that not only is the ER capable of detecting the effects of moisture damage on the fracture resistance of mixtures, it is also shown to detect the presence of antistripping agents in mixtures. Results indicate that the ER may form the basis of a promising combined performance-based fracture criterion for evaluating the effects of moisture damage in mixtures as well as the overall resistance to fracture.
机译：当前可用于测试热拌沥青湿气敏感性的实验室测试程序均通过测量调节前后单个参数的相对变化（即拉伸强度比，弹性模量比）来评估实验室中水分损伤的影响。必须质疑使用单个参数评估水分损害。取而代之的是，需要一个统一的框架来说明关键混合物特性的变化，以有效评估混合物中水分损坏的影响。在此评估了使用新的基于性能的断裂参数，即能量比（ER），以量化水分破坏对混合物的抗断裂性的影响。 ER用于确定水分损害对使用和不使用抗剥离添加剂制备的六种花岗岩混合物的抗断裂性变化的影响。所使用的花岗岩骨料是已知的剥离骨料。另外，使用了一种具有高抗剥离性的石灰石混合物。结果表明，ER不仅能够检测水分破坏对混合物抗断裂性的影响，而且还显示出能够检测混合物中抗剥离剂的存在。结果表明，ER可能构成有希望的基于性能的组合断裂准则的基础，该准则可用于评估混合物中水分破坏的影响以及整体抗断裂性。

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