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Crumb Rubber Modified Crack Sealants to Improve Performance.

机译：碎屑橡胶改性的裂缝密封胶，可提高性能。

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摘要

Crack sealing is considered one of the least expensive and cost effective maintenance activity used on pavements. In some cases, crack sealing suffers from premature failure due to various material, environmental, and construction issues. A survey that was conducted as part of this study showed that the highest sealant failure year occurring on the second year. Therefore, any attempt to increase the sealants' service life by addressing and improving the sealant properties and their resistance to failure will benefit the effectiveness of this treatment.;The goal behind this study was to evaluate the potential improvement in performance of hot applied sealant material commonly used in the Phoenix area, and evaluate the performance of using a neat binder modified with crumb rubber (at 5 and 10% by weight of binder) as a low-grade sealing material. The sealants was also modified with crumb rubber at 2.5, and 5% by weight fo the sealant. Six ASTM tests were conducted for the comparison. These tests are the Standard Penetration Test (SPT) and Cone Penetration Test (CPT), Resilience Test, Softening Point Test, Brookfield Viscometer Test, and Dynamic Shear Rheometer (DSR).;The results showed that adding only crumb rubber to a neat binder for its potential use as a crack sealant is inadequate to meet the specifications expected for sealants. However, the modification of the sealant with crumb rubber showed some benefits, such as increased elasticity and decreased temperature susceptibility. A crumb rubber content of 2.5% by weight of the sealant was recommended.
机译：裂缝密封被认为是人行道上最便宜，成本效益最高的维护活动之一。在某些情况下，由于各种材料，环境和构造问题，裂纹密封会过早失效。这项研究的一部分调查显示，密封剂失效的最高年份发生在第二年。因此，通过解决和改善密封剂性能及其抗破坏性来延长密封剂使用寿命的任何尝试都将有益于该处理方法的有效性。该研究的目的是评估热涂覆密封剂材料性能的潜在改善通常在Phoenix地区使用，并评估使用经碎屑橡胶改性的纯净粘结剂（粘结剂的含量为5％和10％）作为低等级密封材料的性能。密封胶也用2.5％和5％（重量）密封胶的碎胶改性。为了进行比较，进行了六次ASTM测试。这些测试是标准渗透率测试（SPT）和锥形渗透率测试（CPT），回弹力测试，软化点测试，Brookfield粘度计测试和动态剪切流变仪（DSR）。结果表明，在纯净粘合剂中仅添加粒状橡胶由于其潜在的用途是作为裂缝密封胶，因此不足以满足密封胶的预期规格。然而，用碎橡胶改性密封剂显示出一些好处，例如增加的弹性和降低的温度敏感性。推荐的碎屑橡胶含量为密封剂的2.5重量％。

著录项

  • 作者

    Thwaini, Talal.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Civil engineering.
  • 学位 M.S.
  • 年度 2016
  • 页码 115 p.
  • 总页数 115
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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