中国塑料 ›› 2023, Vol. 37 ›› Issue (8): 45-54.DOI: 10.19491/j.issn.1001-9278.2023.08.007

• 材料与性能 • 上一篇    下一篇

SBS/纳米碳酸钙复合改性沥青热稳定性研究

杨喜英1,2(), 陈梦3, 张文才4,5, 裴强5   

  1. 1.山西工程科技职业大学交通工程学院,山西 晋中 030619
    2.山西省交通工程低碳新材料研究中心,太原 030006
    3.山西省交通建设工程质量检测中心(有限公司),太原 030006
    4.太原理工大学化学化工学院,太原 030024
    5.山西省交通科技研发有限公司,太原 030031
  • 收稿日期:2023-05-22 出版日期:2023-08-26 发布日期:2023-08-21
  • 作者简介:杨喜英(1979—),女,正高级工程师,从事道路材料研发及仪器分析技术研究,403099529@qq.com
  • 基金资助:
    山西省应用基础研究计划(201901D211552);山西交通控股集团有限公司科技项目(2022?JKKJ?33)

Study on thermal stability of asphalt modified with styrene butadiene styrene/nano calcium carbonate composite

YANG Xiying1,2(), CHEN Meng3, ZHANG Wencai4,5, PEI Qiang5   

  1. 1.College of Transportation Engineering,Shanxi Vocational University of Engineering Science and Technology,Jinzhong 030619,China
    2.Provincial Technical Innovation Center for Low Carbon Materials in Transportation,Taiyuan 030006,China
    3.Shanxi Transportation Construction Engineering Quality Detection Center (Co,Ltd),Taiyuan 030006,China
    4.College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China
    5.Shanxi Transportation Technology Research & Development Co,Ltd,Taiyuan 030006,China
  • Received:2023-05-22 Online:2023-08-26 Published:2023-08-21

摘要:

为研究苯乙烯⁃丁二烯⁃苯乙烯嵌段共聚物(SBS)/纳米碳酸钙复合改性沥青的热稳定性,通过红外光谱和荧光显微镜技术及材料表界面化学理论,分析了稳定机理及定性判断方法;通过软化点关联法和红外光谱技术关联法分别拟合了软化点、SBS特征峰面积与改性剂含量的回归方程;建立了软化点与SBS特征峰面积的数据模型。结果表明,纳米碳酸钙通过物理作用提高SBS改性沥青的热稳定性;当软化点差(ΔT)≤2.5 ℃时,SBS含量差值(ΔwSBS)≤0.34 %,CaCO3含量差值(ΔwCaCO3)≤0.15 %,体系稳定性良好;红外光谱关联法揭示了体系稳定性内因,当966 cm-1处特征峰面积差值(ΔS966 cm-1)≤0.24时ΔT≤2.5 ℃,体系稳定;回归结果显示,建立的软化点与SBS特征峰面积的数据模型具有统计学意义,可为SBS/纳米材料复合改性沥青热稳定性的研究构建新的评价体系。

关键词: 苯乙烯?丁二烯?苯乙烯嵌段共聚物改性剂, 纳米碳酸钙, 改性沥青, 热稳定性

Abstract:

To determine the thermal stability of styrene⁃butadiene⁃styrene block copolymer (SBS)/nano⁃calcium carbonate composite⁃modified asphalt, the stability mechanism and qualitative judgment method were studied by using infrared spectroscopy, fluorescence microscopy, and material surface interface chemistry theory. Through using a softening point correlation method and an infrared spectroscopy technology correlation method, the regression models of softening point, SBS characteristic peak area, and modifier content were fitted, and a data model for softening point and SBS characteristic peak area was established. The results indicated that nano⁃calcium carbonate improved the thermal stability of SBS⁃modified asphalt through a physical action. The stability of the system was good a softening point difference ≤ 2.5 ℃, a SBS content difference ≤ 0.34 %, and a CaCO3 content difference ≤ 0.15 %. The infrared spectral correlation method revealed the internal factors of the system stability. The system was stable when the difference of characteristic peak area at 966 cm-1 was less than 0.24 and the softening point difference was less than 2.5 °C. The regression results indicated that the data model of softening point and SBS characteristic peak area established by this study was statistically significant, which could construct a new evaluation system for the study of the thermal stability of SBS/nanomaterials composite⁃modified asphalt.

Key words: styrene?butadiene?styrene block copolymer modifier, nano calcium carbonate, modified asphalt, thermal stability

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