Examination of Poly (Styrene-Butadiene-Styrene)-Modified Asphalt Performance in Bonding Modified Aggregates Using Parallel Plates Method
Examination of Poly (Styrene-Butadiene-Styrene)-Modified Asphalt Performance in Bonding Modified Aggregates Using Parallel Plates Method
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用平行板法检验聚（苯乙烯-丁二烯-苯乙烯）改性沥青在粘结改性骨料中的性能
DOI：
10.3390/polym11122100
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发表时间：
2019-12
期刊：
影响因子：
5
通讯作者：
Kaikai Hu
中科院分区：
文献类型：
--
作者：
Xiangbing Gong;Zejiao Dong;Zhiyang Liu;Huanan Yu;Kaikai Hu
沥青-集料粘结对热拌沥青混合料的接触强度有很大影响，但在动态剪切试验中，由于仅采用金属平行板，对沥青-集料粘结强度的影响还不清楚。采用不同类型集料为芯材的改进平行板模拟沥青混合料中集料-沥青-集料（AAA）夹层结构，旨在综合解释粘结对AAA夹层结构的影响。本研究从实验设计开始，将骨料板和接头夹加工成安装到流变仪中。骨料类型和加载条件被设置为基本变量。随后，利用微观测试，以获得集料的化学成分，界面的微观形貌，和板的粗糙度。对聚苯乙烯-丁二烯-苯乙烯改性沥青与集料板粘结进行了剪切试验。对照组采用金属板固定，实验步骤同前。结果表明，集料类型对粘结料流变特性的影响取决于试验变量，在沥青混合料设计中，集料的选择应考虑集料的微观特性和组分差异。
Although asphalt-aggregate bonding provides contacting strength for hot mix asphalt (HMA), it is still ignorant in dynamic shear test, due to the only use of metal parallel plate. Modified parallel plates cored from different types of aggregate were provided to simulate aggregate-asphalt-aggregate (AAA) sandwich in HMA, aiming at the comprehensive interpretation on bonding’s influence. This study began with an experimental design, aggregate plates, and joint clamps were processed to be installed into the rheometer. Aggregate type and loading conditions were set as essential variables. Subsequently, microscopic tests were utilized to obtain chemical components of aggregate, micro morphology of interface, and roughness of plates. The shearing tests for poly (styrene-butadiene-styrene)-modified asphalt were conducted in bonding with aggregate plates. Meanwhile, contrasting groups adopting metal plates followed the same experimental procedures. The results indicate that the influence of aggregate type on binder’s rheological characteristics is dependent on the experimental variables, and microscopic characteristics and component differences should be taken into consideration when selecting aggregates in designing asphalt mixtures.
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