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首页> 外文会议>European symposium on performance of bituminous and hydraulic materials in pavements >Hardening and aging of bituminous materials in hot arid regions
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Hardening and aging of bituminous materials in hot arid regions

机译：热干旱地区沥青材料的硬化和老化

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In Libya a large network of thousands of kilometers of highways and airfields was constructed during the last three decades. Unfortunately, many of these pavements have suffered from early distress in form of surface cracks appearing at pavement outer edges and along the white and yellow road markings. Preliminary diagnoses of these cracks indicated that they are non load-associated thermal cracks caused by the action of the severe environment. The basic purpose of this study was to investigate the problem of rapid hardening and aging of bituminous materials in hot arid regions. An experimental program has been carried out to follow up the process of hardening by monitoring the loss of volatile components and measuring the viscosity of the bitumen. Test samples were taken from selected sites where this phenomenon is experienced, to find out the effect of hardening due to aging and exposure to solar radiation at different depths from the surface and at different ages. The Rheometer test was used to measure the viscosity of the bitumen binder. Two further tests for monitoring the hardening of the bitumen binder were carried out. These included a chemical analysis to measure the loss of volatile components of the binder using the Gas Chromatography technique, and the measurement of the apparent viscosity of the bitumen using the sliding plate viscometer. Finally, conclusions and recommendations drawn from this work are summarized.
机译：在利比亚在过去三十年中建造了大量高速公路和机场的大型网络。不幸的是，许多这些路面患有早期的痛苦，形成在路面外边缘的表面裂缝形式，沿着白色和黄色道路标记。这些裂缝的初步诊断表明它们是由严重环境的作用引起的非负载相关的热裂缝。本研究的基本目的是探讨热干旱地区沥青材料快速硬化和老化的问题。已经进行了实验计划，以便通过监测挥发性组分的损失并测量沥青的粘度来跟踪硬化过程。从经历这种现象的选定地点取出测试样品，以发现由于老化和暴露于来自表面和不同年龄的不同深度的老化和太阳辐射而导致的硬化的效果。流变仪试验用于测量沥青粘合剂的粘度。进行了监测沥青粘合剂的硬化的另外两个测试。这些包括化学分析，用于使用气相色谱技术测量粘合剂的挥发性组分的损失，以及使用滑板粘度计的沥青的表观粘度的测量。最后，总结了从这项工作中得出的结论和建议。

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