Sengoz Burak, Isikyakar Giray
Dokuz Eylul University, Faculty of Engineering, Department of Civil Engineering, 35160 Buca, Izmir, Turkey.
J Hazard Mater. 2008 Jan 31;150(2):424-32. doi: 10.1016/j.jhazmat.2007.04.122. Epub 2007 May 3.
This paper presents a laboratory study of modified bitumen containing styrene-butadiene-styrene (SBS) copolymer. Polymer modified bitumen (PMB) samples have been produced by mixing a 50/70 penetration grade unmodified (base) bitumen with SBS Kraton D1101 copolymer at five different polymer contents. The fundamental characteristics of the SBS PMB samples have been determined using conventional methods. The morphology of the samples as well as the percent area (%) distribution of SBS polymers throughout the base bitumen have been characterized and determined by means of fluorescence microscopy and Qwin Plus image analysis program, respectively. The mechanical properties of the hot-mix asphalt (HMA) containing SBS PMBs have also been analyzed and compared with HMA incorporating base bitumen. The effect of polymer addition on the short and long term aging characteristics of HMA have been evaluated by indirect tensile strength (ITS) test. The results indicated that polymer modification improved the conventional properties (penetration, softening point, etc.) and the mechanical properties (Marshall, ITS, etc.) of the base bitumen. It was also concluded that at low polymer contents, the samples revealed the existence of dispersed polymer particles in a continuous bitumen phase, whereas at high polymer contents a continuous polymer phase has been observed. Moreover, it was found out that the polymer addition minimizes the short and long term aging of HMA.
本文介绍了一项关于含有苯乙烯-丁二烯-苯乙烯（SBS）共聚物的改性沥青的实验室研究。通过将50/70针入度等级的未改性（基础）沥青与SBS科聚亚D1101共聚物以五种不同的聚合物含量进行混合，制备了聚合物改性沥青（PMB）样品。使用常规方法测定了SBS PMB样品的基本特性。分别通过荧光显微镜和Qwin Plus图像分析程序对样品的形态以及SBS聚合物在整个基础沥青中的面积百分比（%）分布进行了表征和测定。还对含有SBS PMB的热拌沥青（HMA）的力学性能进行了分析，并与含有基础沥青的HMA进行了比较。通过间接拉伸强度（ITS）试验评估了聚合物添加对HMA短期和长期老化特性的影响。结果表明，聚合物改性改善了基础沥青的常规性能（针入度、软化点等）和力学性能（马歇尔试验、ITS等）。研究还得出结论，在低聚合物含量下，样品显示出在连续沥青相中存在分散的聚合物颗粒，而在高聚合物含量下，则观察到连续的聚合物相。此外，还发现聚合物的添加使HMA的短期和长期老化最小化。
