基于生态路面减排理念下的CeO_(2)柱撑蒙脱土改性沥青及其催化性能研究  

Study on CeO_(2) Pillared Montmorillonite Modified Asphalt and Its Catalytic Performance Based on the Emission Reduction of Ecological Pavement

作　　者：金娇[1] 刘墨晗 刘帅 陈柏臻 刘欣宇 JIN Jiao;LIU Mohan;LIU Shuai;CHEN Bozhen;LIU Xinyu(School of Traffic and Transportation Engineering,Changsha University of Science and Technology,Changsha 410114,China;Hubei Communications Investment Construction Group Co.,Ltd.,Wuhan 430050,China)

机构地区：[1]长沙理工大学交通运输工程学院,长沙410114 [2]湖北交投建设集团有限公司,武汉430050

出　　处：《材料导报》2022年第16期26-32,共7页Materials Reports

基　　金：国家自然科学基金(52174237);湖南创新型省份建设专项(2020RC3039);湖南省杰出青年科学基金(2022JJ10051);长沙市科技计划项目(kq2106042)。

摘　　要：路面耐久性提升及功能性开发是目前道路领域现阶段研究的热点。本工作采用液相沉淀法制备了Ce-MMT新型绿色复合材料,对改性前后的蒙脱土的结构组成和微观形貌等进行分析对比,发现CeO_(2)成功进入蒙脱土层间形成柱撑结构,且新型复合材料在紫外光和可见光区域的吸收能力得到增强。此外,对不同掺量的Ce-MMT改性沥青的高低温性能、抗老化性能以及光催化降解尾气效率进行了探究。结果表明:在4%~6%(质量分数,下同)掺量范围内,Ce-MMT可以显著提高沥青的高温性能和抗老化性能,且6%掺量的改性沥青在模拟汽车尾气实验中反应120 min后,对NO的降解效率可高达50.8%。本研究基于功能型路面主动降解路域残余尾气能力的提升,旨在促进绿色道路领域新发展。The improvement of pavement durability and functional development are the current research hotspots in the field of road.The CeO_(2) pillared montmorillonite(Ce-MMT)composite modifier was prepared by the liquid-phase precipitation method.By analyzing the structural composition and microscopic characterization,it was found that CeO_(2) successfully entered the interlayer of montmorillonite to form a pillared structure,and the absorptive ability of the new composite material in the ultraviolet and visible light regions was significantly enhanced.The high and low-tempe-rature performance,anti-aging performance,and catalytic degradation efficiency of modified asphalt with different Ce-MMT content were also studied.The results show that Ce-MMT can effectively improve the high-temperature performance and the anti-aging performance of the asphalt,when the content range of the modifier is 4wt%—6wt%.Besides,the Ce-MMT modified asphalt with a content of 6%can degrade NO up to 50.8%after reacting for 120 min in the simulated automobile exhaust test.This study is based on the enhancement of the capability of functional pavement to actively degrade the residual exhaust gas in the road domain,and aims to promote the new development of green road field.

关 键 词：蒙脱土 纳米柱撑 改性沥青 老化 尾气降解 

分 类 号：U414[交通运输工程—道路与铁道工程]