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首页> 外文会议>Asphalt Rubber 2009 Conference(2009国际橡胶沥青大会） >Influence of Digestion Time on the Mechanical Properties of Gap-graded Hot Mixes Produced with Asphalt Rubber Binders
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Influence of Digestion Time on the Mechanical Properties of Gap-graded Hot Mixes Produced with Asphalt Rubber Binders

机译：消化时间对沥青胶黏剂产生的间隙分级热混合料力学性能的影响

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摘要

Asphalt rubber binders are produced by mixing crumb rubber obtained from ground used tires with a straight run binder at high temperatures during a period of time named as digestion time. This is one of many variables that influence the physical properties of asphalt rubber produced by wet process. Thus, the objective of this paper is to evaluate how many mechanical properties of gap-graded hot mixes produced with asphalt rubber binder are influenced by the digestion time used to produce this modified binder. The asphalt rubber binders were produced by incorporating 21% in weight of crumb rubber into a straight run binder at 210℃. The digestion times used were 60 and 300 minutes. These asphalt rubber binders were used to produce gap-graded hot mixes which were submitted to tensile strength, fatigue life, resilient modulus and permanent deformation tests. The results show that the increase of digestion time used to produce asphalt rubber binders led to a decrease of tensile strength, resilient modulus and permanent deformation. However, there was a significantly increase of fatigue life of asphalt hot mixes studied.
机译：沥青橡胶粘合剂是在高温下，将由磨碎的旧轮胎得到的橡胶屑与直馏粘合剂在高温下混合的过程中产生的，该时间称为消解时间。这是影响湿法生产的沥青橡胶的物理性能的众多变量之一。因此，本文的目的是评估由沥青橡胶粘合剂生产的间隙分级热混合物有多少机械性能受到用于生产这种改性粘合剂的消解时间的影响。沥青橡胶粘合剂是通过在210℃将21％重量的粒状橡胶掺入直馏粘合剂中来生产的。使用的消化时间分别为60分钟和300分钟。这些沥青橡胶粘合剂用于生产间隙分级的热混合料，这些混合料经受了拉伸强度，疲劳寿命，弹性模量和永久变形测试。结果表明，用于制备沥青橡胶粘合剂的消解时间的增加导致拉伸强度，弹性模量和永久变形的降低。但是，所研究的沥青热混合料的疲劳寿命显着增加。

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