Characteristics of elastomeric and plastomeric binders in contact with natural asphalts
Characteristics of elastomeric and plastomeric binders in contact with natural asphalts
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DOI：
10.1016/j.conbuildmat.2005.12.025
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发表时间：
2008-03
影响因子：
7.4
通讯作者：
I. Widyatmoko;R. Elliott
中科院分区：
文献类型：
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作者：
I. Widyatmoko;R. Elliott
已知沥青粘合剂具有简单的流变特性。天然沥青，如特立尼达湖沥青 (TLA) 和 Uintaite，通常用于沥青改性，以获得各自沥青混合料的改进性能（如刚度和抗变形能力）。本文介绍了对含有天然沥青（特别是 TLA 和 Uintaite）和/或聚合物改性剂的沥青粘合剂的“经验”和流变性能进行一系列评估的结果。通过针入度和环球软化点测试测量的粘合剂“经验”特性表明，天然沥青在“传统混合配方”预期的水平上降低或增加了这些各自的“经验”值。然而，流变学分析表明，添加天然沥青所引起的“硬化”效应（通常在掺入未改性沥青的沥青中预计会出现这种现象）如果还使用聚合物改性剂，则会以不同的方式发生。
Bituminous binders are known to have simple rheological properties. Natural asphalts, such as Trinidad Lake Asphalt (TLA) and Uintaite, are often used for bitumen modification in order to obtain improved performance of the respective asphalt mixture (such as stiffness and deformation resistance). This paper presents the results from a series of assessments of ‘empirical’ and rheological properties of bituminous binders, which incorporate natural asphalts (specifically TLA and Uintaite) and/or polymer modifiers. Binder ‘empirical’ properties, measured by penetration and Ring and Ball softening point tests, showed that natural asphalts reduce or increase these respective “empirical” values at the level anticipated by “conventional blending formulas”. However, rheological analysis showed that the “stiffening” effect caused by addition of natural asphalts, which is normally anticipated in the case of asphalt incorporating unmodified bitumen, took place in a different way if a polymer modifier was also used.