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A Material Testing Methodology for In Situ Quality Control of Low Temperature Performance in Asphalt Pavements

机译：沥青路面低温性能原位质量控制的材料测试方法

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A material testing protocol using asphalt mixture beams in the Bending Beam Rheometer (BBR) is presented in the paper to provide a methodology that can be used by highway agencies in day-to-day quality control and mix design. The objectives of the study are to (1) present an experiment plan that describes the processes of asphalt mixture specimen production and material testing procedures using the BBR instrument, and (2) provide future research work with a starting point to develop a specification of using asphalt mixture beams in the BBR for evaluating the low temperature performance of asphalt materials. Several factors that influence the accuracy of a BBR test are taken in consideration. Air void consistency between compacted samples and asphalt mixture beams is evaluated. Statistical approaches are used to determine the number of replicates in order for a BBR test to be valid. An asphalt pavement construction project in Salt Lake City, Utah is used to demonstrate the applicability of using asphalt mixture beams in the BBR for in situ quality control of asphalt pavements. Based on testing results, there was an anomaly on three paving days that indicates an irregularity on asphalt materials placed in the field. The paper concludes that the material testing methodology using asphalt mixture beams in the BBR is capable of evaluating low temperature performance of asphalt mixtures. The material testing methodology can quickly settle any dispute, and can be adopted by highway agencies to perform in situ quality control of low temperature performance in asphalt pavements.
机译：本文介绍了一种在弯曲梁流变仪（BBR）中使用沥青混合梁的材料测试方案，以提供一种可供公路部门用于日常质量控制和混合设计的方法。研究的目的是（1）提出一个实验计划，该计划描述了使用BBR仪器生产沥青混合物标本的过程和材料测试程序，以及（2）为将来的研究工作提供了起点，以制定使用规范BBR中的沥青混合料梁用于评估沥青材料的低温性能。考虑了影响BBR测试准确性的几个因素。评估压实样品和沥青混合料梁之间的气孔一致性。统计方法用于确定重复次数，以使BBR测试有效。犹他州盐湖城的沥青路面建设项目用于演示在BBR中使用沥青混合料梁进行沥青路面原位质量控制的适用性。根据测试结果，在三天的摊铺过程中出现异常，表明在田间放置的沥青材料存在不规则性。本文得出的结论是，在BBR中使用沥青混合料梁的材料测试方法能够评估沥青混合料的低温性能。该材料测试方法可以迅速解决任何争议，并且可以被公路部门采用，以对沥青路面的低温性能进行现场质量控制。

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