光谱技术在沥青材料领域的研究进展
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武汉科技大学汽车与交通工程学院

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U416.217

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国家自然科学基金面上项目(51778509);国家自然科学基金面上项目(51578430);国家重大科研仪器研制项目(51827812)


Research Progress of Spectroscopic Techniques in Asphalt Materials
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School of Automobile and Traffic Engineering,Wuhan University of Science and Technology

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    摘要:

    作为一种快速、准确地检测和分析有机材料的工具,红外光谱法(Infrared Spectroscopy,IR)在沥青材料中的研究中已经得到了广泛的应用。为了明确国内外红外光谱方法在沥青材料中的研究现状,对红外光谱技术的基本原理和测试方法、沥青材料的来源识别、改性沥青中改性剂的选择和剂量、沥青老化分析以及再生沥青的应用等热点问题研究进展进行了综述和总结。分析结果表明:沥青分子结构的红外特征吸收峰主要由饱和烃、芳香烃、羧基、羟基化合物、含氮化合物和含硫化合物吸收峰构成,不同品牌或来源的沥青材料的红外光谱图特征吸收峰的位置、相对强度大不相同,依据特征峰可实现对沥青油源品牌进行识别和沥青真伪的鉴定;对于不同改性剂含量的改性沥青,基质沥青分子和改性剂聚合物分子吸收峰位置大致相同,根据吸收峰的吸光度或面积的不同进一步分析处理可实现改性沥青改性剂含量的测定;在老化沥青的红外光谱图中,羰基(1700cm-1)和亚砜基(1030cm-1)两个特征峰均随老化时间延长而增大,反映了沥青的老化程度;而再生沥青的红外光谱图中羰基和亚砜基官能团的数量明显减少,对实现废弃旧沥青混合料的回收利用提供了依据。

    Abstract:

    Infrared spectroscopy (IR) has been widely used in the study of asphalt materials as a fast and accurate tool for the detection and analysis of organic materials. To understand the current status of research on infrared spectrum method in asphalt materials at home and abroad, the basic principle and test method of infrared spectroscopy, asphalt material source identification, selection and dosage of the modified asphalt modifier in, and the application of recycled asphalt, asphalt aging analysis such as hot topic research progress is reviewed and summarized. The analysis results show that the infrared characteristic absorption peak of asphalt molecular structure is mainly composed of saturated hydrocarbon, aromatic hydrocarbon, carboxyl, hydroxyl compounds, nitrogen compounds and sulfur absorption peaks, different brand or source of infrared spectra of asphalt material characteristic absorption peak position, relative strength is very different, according to the characteristic peak of asphalt oil source can be realized brand identification and asphalt authenticity identification; For modified asphalt with different modifier content, the position of molecular absorption peak of matrix asphalt and modifier polymer is roughly the same. Further analysis and treatment can realize the determination of modified asphalt modifier content according to the difference of absorbance or area of the absorption peak. In the infrared spectrogram of aged asphalt, the characteristic peaks of carbonyl group (1700cm-1) and sulfoxide group (1030cm-1) both increase with the extension of aging time, reflecting the degree of asphalt aging. However, the number of carbonyl and sulfoxyl functional groups in the infrared spectra of the recycled asphalt decreased significantly, which provided a basis for the recovery and utilization of the waste asphalt mixture.

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周兴林,赵子翔,冉茂平,等. 光谱技术在沥青材料领域的研究进展[J]. 科学技术与工程, , ():

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  • 收稿日期:2020-10-29
  • 最后修改日期:2021-07-30
  • 录用日期:2021-08-02
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