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Qualitative analysis of SBS modifier in asphalt pavements using field samples

机译：使用田间样本的沥青路面SBS改性剂的定性分析

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Series of tests are implemented to analysis the related characteristics of common asphalt and unknown asphalt mainly using Fourier Transform Infrared (FT-IR) and Dynamic Shear Rheometer (DSR) for chemical compositions and rheological properties of asphalt, respectively. In addition, a series of mechanical properties were performed on asphalt mixtures, including indirect tensile strength test and three point bending test at low temperature. Experimental results indicated that compared with common asphalt, the characteristic absorption peak of the unknown asphalt are appeared at 966cm-1and 699cm-1, which are accordant with the SBS modifier. The results of DSR indicated that the unknown asphalt's complex modulus is higher and the phase angle is lower. The mechanical tests indicated that some properties of the unknown mixture samples are increased by 24.7%～41.8% compared with common pavement sample, like the indirect tensile strength, the bending test at low temperature and indirect tensile resilient modulus. Comprehensive analysis indicates that SBS modifier is existed in the unknown asphalt pavement.
机译：实施系列测试以分析普通沥青和未知沥青的相关特征，主要是使用傅里叶变换红外（FT-IR）和动态剪切流变仪（DSR）分别用于化学成分和沥青的流变性质。此外，在沥青混合物上进行一系列机械性能，包括间接拉伸强度试验和低温下的三点弯曲试验。实验结果表明，与常见沥青相比，未知沥青的特征吸收峰出现在966cm-1和699cm-1中，其与SBS改性剂致法。 DSR的结果表明，未知的沥青的复杂模量较高，相位角较低。机械测试表明，与普通路面样品相比，未知混合物样品的一些性能增加24.7％〜41.8％，如间接拉伸强度，低温下的弯曲试验和间接拉伸弹性模量。综合分析表明，在未知的沥青路面中存在SBS改性剂。

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