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首页> 外文会议>Proceedings of the Fifty-Third annual conference of the Canadian Technical Asphalt Association(CTAA) >Preliminary Findings from Saskatchewan’s Asphalt Rubber Project
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Preliminary Findings from Saskatchewan’s Asphalt Rubber Project

机译：萨斯喀彻温省沥青橡胶项目的初步发现

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Use of crumb rubber as an additive in asphalt concrete mixes has been predominantly limited to milderrnclimates and the performance of asphalt rubber pavements in Canada has been variable. Some of thernbenefits of rubber asphalt are thought to be improved resistance to cracking and improved structuralrncapacity, which in turn may allow reduction of structural layer thickness. Since these concepts are ofrninterest to the Saskatchewan Ministry of Highways and Infrastructure (MHI), an asphalt rubber pavementrnwas designed and constructed on Highway 11, near Findlater, as part of a rehabilitation strategy for thisrnstructural asphalt concrete pavement highway.rnTest sections were constructed in July 2005 to evaluate the effectiveness of the rubber asphalt mix as arnrehabilitation overlay treatment for typical Saskatchewan asphalt concrete pavements, in comparison tornthe dense-graded asphalt mixes used by MHI. Laboratory testing was carried out to complement the fieldrnevaluation, and to quantify the mechanistic properties of the asphalt rubber mix. As well, structural fieldrntesting was performed to evaluate in-situ properties of the asphalt rubber and the conventional dense-gradedrnasphalt mix.rnTo date both the conventional mix and the asphalt rubber are performing well in the field. Based on thernlaboratory characterization results, minimal difference in material properties was observed between thernconventional asphalt mix and asphalt rubber mix at 20°C. Additionally, the non-destructive structuralrncharacterization results indicate that to date the conventional mix and the asphalt rubber are performingrncomparably in terms of deflections.
机译：在沥青混凝土混合物中使用碎橡胶作为添加剂主要限于温和气候，并且加拿大的沥青橡胶路面的性能是可变的。橡胶沥青的某些优点被认为是改进的抗裂性和改进的结构容量，这继而可以减小结构层的厚度。由于萨斯喀彻温省公路和基础设施部（MHI）对这些概念不感兴趣，因此在Findlater附近的11号公路上设计和建造了沥青橡胶路面，作为该结构沥青混凝土路面公路修复策略的一部分。 2005年评估了橡胶沥青混合料作为典型的萨斯喀彻温省沥青混凝土路面的arnerhabilitation覆盖处理的有效性，与MHI所使用的致密分级沥青混合料相比。进行了实验室测试以补充现场评估，并量化沥青橡胶混合物的机械性能。同样，进行结构现场测试以评估沥青橡胶和常规致密级鼻沥青混合料的原位性能。迄今为止，常规混合料和沥青橡胶在现场均表现良好。根据实验室表征结果，在20°C下观察到常规沥青混合料和沥青橡胶混合料在材料性能上的差异最小。另外，非破坏性结构表征结果表明，迄今为止，常规混合物和沥青橡胶在挠度方面具有可比性。

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