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楚晓辉

（ 河南交院工程技术有限公司 ，河南 郑州 450000)

摘   要 ：通过车辙试验 、低温弯曲试验 、浸水马歇尔试验和冻融劈裂试验研究了蒙脱土掺量对丁苯橡胶改性沥青混合料的高低温和水稳定性影响，采用邓氏关联度分析蒙脱土掺量对路用性能的影响规律。结果表明： 蒙脱土可改变丁苯橡胶改性沥青混合料的高温稳定性和水稳定性，且掺量超过 4% 后会对水稳定性产生不利影响，掺入蒙脱土会使低温抗裂性变差；蒙脱土掺量对丁苯橡胶改性沥青混合料路用性能指标的影响程度大小依次为高温性能＜水稳定性 ＜低温性能。综合考虑各方面性能影响及其影响程度大小，蒙脱土掺量适宜为2% ~   4% ,  建议蒙脱土掺量为 3% 。

关键词：蒙脱土 ；丁苯橡胶 ；沥青混合料 ；路用性能

中图分类号：U414           

文献标志码：A           

文章编号： 1005- 8249   (2024)  04- 0134- 04 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.04.024

 

CHU Xiaohui

(Henan Jiaotong Institute Engineering Technology Co. ，Ltd. ，Zhengzhou 450000 ,   China)

Abstract : The effects of montmorillonite content on the high and low temperature and water stability of styrene butadiene rubber modified asphalt mixture were studied by rutting test, low temperature bending test, immersion Marshall test and freeze-thaw splitting test, and the influence of montmorillonite content on road performance was analyzed by Deng 's correlation degree. The results show that montmorillonite can improve the high temperature stability and water stability of styrene butadiene rubber modified asphalt mixture, and the water stability will be adversely affected when the content exceeds 4 %. The results show that addition of montmorillonite will make the low temperature crack resistance worse. The influence of montmorillonite content on the road performance index of styrene-butadiene rubber modified asphalt mixture was in the order of high temperature performance < water stability < low temperature performance. Considering the influence of various aspects of performance and the degree of influence, the suitable content of montmorillonite is 2 % ~ 4 %,recommended content of montmorillonite is 3 %.

Keywords: montmorillonite; butadiene styrene rubber; asphalt mixture; road performance

作者简介： 楚晓辉  (1975—) ,   男 ，本科 ， 高级工程师 ，研究方向：公路与桥梁及城市道路。

收稿日期：2023- 03- 1 1