...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Construction and Building Materials >Evaluation of moisture damage in hot mix asphalt using simple performance and superpave indirect tensile tests
【24h】

Evaluation of moisture damage in hot mix asphalt using simple performance and superpave indirect tensile tests

机译：使用简单的性能和超铺面间接拉伸试验评估热拌沥青中的水分破坏

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Moisture damage has been one of the major concerns for hot mix asphalt (HMA) pavements. In the present study, efforts have been made to evaluate the moisture damage of a dense-graded surface HMA mixture using simple performance test (SPT) and Superpave~(TM) indirect tensile test (IDT). Coarse gravels at three different angularity levels (100, 50 and 0% fractured surface counts) were used to produce mixtures with similar aggregate gradations. Asphalt binders (PG 64-22) with and without amine-based antistrip additive (ASA) were used to make mixtures for laboratory moisture damage evaluations. Specimens were conditioned by four different methods: (1) one cycle of freeze-thaw (F-T), (2) two cycles of F-T, (3) 500 cycles of pore pressure pulses with Moisture Induced Stress Tester (MIST), and (4) 1000 cycles with MIST. The dynamic modulus, Superpave IDT creep, resilient modulus and strength tests were performed on conditioned and unconditioned specimens. The results from this study indicated that the SPT dynamic modulus test and the Superpave IDT with F-T or MIST conditionings were effective to characterize lab-measured moisture susceptibility of HMA mixtures. Increasing F-T or MIST cycles would increase moisture damage in HMA mixtures. Amine-based antistrip additive was effective to decrease the moisture damage in HMA mixtures. Increasing coarse aggregate angularity (CAA) levels could increase dynamic modulus; however, it seemed that CAA had no significant effects on the lab-measured moisture resistance of HMA mixtures.
机译：湿气损坏一直是热拌沥青路面的主要问题之一。在本研究中，已努力使用简单性能测试（SPT）和Superpave〜TM间接拉伸测试（IDT）来评估致密渐变表面HMA混合物的水分破坏。使用三种不同的角度水平（100、50和0％的破裂表面数量）的粗砾石来生产具有相似聚集度的混合物。含和不含胺基抗条剂添加剂（ASA）的沥青粘合剂（PG 64-22）用于制备混合物，以评估实验室的湿气损害。样品通过四种不同的方法进行处理：（1）冻融（FT）的一个周期，（2）FT的两个周期，（3）使用水分诱导应力测试仪（MIST）的500个孔隙压力脉冲周期，以及（4 ）使用MIST进行1000次循环。动态模量，Superpave IDT蠕变，回弹模量和强度测试在条件和非条件试样上进行。这项研究的结果表明，SPT动态模量测试和具有F-T或MIST条件的Superpave IDT可有效表征实验室测量的HMA混合物的湿气敏感性。增加F-T或MIST循环会增加HMA混合物中的水分损坏。胺基抗剥离剂可有效减少HMA混合物中的水分损坏。增加粗骨料总角度（CAA）会增加动态模量。但是，CAA似乎对实验室测量的HMA混合物的耐湿性没有明显影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号