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首页> 外文期刊>Energy & fuels >Comparison of Chemical and Microstructural Properties of Virgin and Reclaimed Asphalt Pavement Binders and Their Saturate, Aromatic, Resin, and Asphaltene Fractions
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Comparison of Chemical and Microstructural Properties of Virgin and Reclaimed Asphalt Pavement Binders and Their Saturate, Aromatic, Resin, and Asphaltene Fractions

机译：原始沥青路面和再生沥青路面粘结剂及其饱和，芳香，树脂和沥青组分的化学和微观结构性质的比较

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摘要

The chemical properties and microstructural features of two straight-run virgin asphalt binders (PG 52-34 and 58-28) and a reclaimed asphalt pavement (RAP) binder as well as their corresponding saturate, aromatic, resin, and asphaltene (SARA) fractions were examined. Additionally, the properties of the binders with laboratory and plant mixture blending were also observed. Examining the corresponding SARA fractions revealed that the increases in the carbonyl index of RAP relative to the virgin binders were mainly found in the resin and asphaltene fractions, while the increase in the sulfoxide index is mainly found in the asphaltene fraction. The chemical properties were examined using Fourier transform infrared spectrometry. The RAP binder showed a significant increase in the indices of the carbonyl (I-c=0 ) and sulfoxide (I-s=0 ) functional groups compared to the virgin binders. The plant blended binders showed that additional silo storage at the plant increases the carbonyl index. The microstructural features of the binders were examined using environmental scanning electron microscopy (ESEM). The fibril microstructure of the virgin binders was found to be relatively sparse. On the other hand, this microstructure was not visible in the RAP binder, possibly as a result of the severity of the aging, with a severly aged blended binder structure only becoming visible at higher irradiation intensity. The ESEM observation of the resin and naphthene aromatic fractions did not reveal a fibril microstructure as it did in the binders.
机译：两种直馏纯沥青粘合剂（PG 52-34和58-28）和再生沥青路面（RAP）粘合剂及其相应的饱和，芳族，树脂和沥青质（SARA）馏分的化学性质和微观结构特征被检查。另外，还观察到了通过实验室和植物混合物共混的粘合剂的性能。检查相应的SARA馏分表明，相对于原始粘合剂，RAP的羰基指数增加主要出现在树脂和沥青质馏分中，而亚砜指数的增加主要出现在沥青质馏分中。使用傅里叶变换红外光谱法检查化学性质。与原始粘合剂相比，RAP粘合剂的羰基（I-c = 0）和亚砜（I-s = 0）官能团的指数显着增加。植物掺合的粘合剂表明，工厂中额外的料仓存储会增加羰基指数。使用环境扫描电子显微镜（ESEM）检查了粘合剂的微观结构特征。发现原始粘合剂的原纤维微结构相对稀疏。另一方面，可能由于老化的严重性，在RAP粘结剂中看不到这种微观结构，严重老化的共混粘结剂结构只有在较高的照射强度下才可见。 ESEM对树脂和环烷芳烃馏分的观察没有像在粘合剂中那样显示原纤维的微观结构。

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  • 来源
    《Energy & fuels》 |2019年第4期|2633-2640|共8页
  • 作者

    Mikhailenko Peter; Baaj Hassan;

  • 作者单位

    Univ Waterloo, Dept Civil & Environm Engn, Ctr Pavement & Transportat Technol CPATT, Waterloo, ON N2L 3G1, Canada|Empa, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland;

    Univ Waterloo, Dept Civil & Environm Engn, Ctr Pavement & Transportat Technol CPATT, Waterloo, ON N2L 3G1, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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