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首页> 外文会议>Asphalt Rubber 2009 Conference(2009国际橡胶沥青大会） >Effect of Cryogenic and Ambient Crushed Rubber on the Mechanical Properties of Hot Mix Asphalts
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Effect of Cryogenic and Ambient Crushed Rubber on the Mechanical Properties of Hot Mix Asphalts

机译：低温和环境破碎橡胶对热拌沥青力学性能的影响

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摘要

The crumb rubber used to produce asphalt rubber binders can be obtained either through the ambient grinding or the cryogenic processes. The final product obtained usually presents significant differences which influence the physical properties of asphalt rubber binders and, consequently, the mechanical properties of the asphalt rubber hot mixes produced with these modified binders. The objective of the study presented in this paper is to learn about the influence that the type of crumb rubber used to produce asphalt rubber binders has on the mechanical properties of dense graded asphalt hot mixes. Asphalt rubber binders were produced with a 21% of crumb rubber obtained through the ambient grinding and cryogenic processes. The dense graded asphalt hot mixes were produced with asphalt rubber and straight binders for comparison. The tests used to evaluate the mechanical properties were: a) tensile strength; b) fatigue life: c) resilient modulus and d) permanent deformation (RSST-CH). The results show that the most significant difference in relation to the mechanical behavior of the asphalt rubber hot mixes tested was the resistance to permanent deformation which was enhanced by the use of crumb rubber obtained through the ambient grinding process.
机译：用于生产沥青橡胶粘合剂的粒状橡胶可通过环境研磨或低温工艺获得。所得的最终产品通常具有明显的差异，这些差异会影响沥青橡胶粘合剂的物理性能，进而影响由这些改性粘合剂生产的沥青橡胶热混合物的机械性能。本文提出的研究目的是要了解用于生产沥青橡胶粘合剂的碎胶类型对致密渐变沥青热混合料力学性能的影响。沥青橡胶粘合剂是用21％的通过室温研磨和低温工艺获得的粒状生胶生产的。为了进行比较，用沥青橡胶和直质粘合剂生产了高密度的沥青热混合料。用于评估机械性能的测试是：a）拉伸强度； b）疲劳寿命：c）弹性模量和d）永久变形（RSST-CH）。结果表明，与所测试的沥青橡胶热混物的机械性能有关的最显着差异是对永久变形的抵抗力，这是通过使用通过环境研磨工艺获得的粒状橡胶而得到增强的。

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