Relationship between glass transition temperature and low temperature properties of oil modified binders

材料科学 玻璃化转变 流变学 差示扫描量热法 沥青 流变仪 复合材料 断裂(地质) 转变温度 动态剪切流变仪 放松(心理学) 热力学 聚合物 超导电性 量子力学 社会心理学 物理 心理学
作者
Lei Zhang,Yiqiu Tan,Hussain U. Bahia
出处
期刊:Construction and Building Materials [Elsevier BV]
卷期号:104: 92-98 被引量:33
标识
DOI:10.1016/j.conbuildmat.2015.12.048
摘要

Oils can be used as modifiers to improve low temperature performance of asphalt. However, the relationship between phase transition of oil modified asphalt and their low temperature properties still need more detailed research to reveal the effect of the transition on rheological properties. To investigate this, 9 different oils of bio-base and refined waste oils are used as modifiers in this study. During the study, Modulated Differential Scanning Calorimetry (MDSC) test is used to study the phase transition, and the Bending Beam Rheometer (BBR) test and Single Edge Notched Beam (SENB) test are used to evaluate the rheological and fracture properties of oil modified asphalts, respectively. It is found that the glass transition temperatures of oil modifiers are significantly different but are all much lower than the glass transition temperatures of asphalts. The results show that there is a good linear relationship between glass transition temperature and stiffness of asphalts, but no good correlation with the relaxation parameter (m) measured with the BBR. There is a much stronger correlation of the glass transition temperatures with the fracture properties of asphalts. Considering this strong relationship with the fracture properties, DSC test shows the potential possibility for quickly and accurately evaluating the low temperature fracture performance of asphalts. The combination of BBR and DCS can therefore be used to select the type and amount of oil modifier to meet a specific low temperature performance. The study was limited to one asphalt source and thus validation of the relationships for other asphalts is needed before generalizing the results.
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