Study on Air-Purifying Performance of Semi-Flexible Asphalt Samples Coated with Titanium Dioxide Using Different Methods  

作　　者：Shoujing Yan Yangyang Wang Fengxia Chi Xue Luo Tianjie Zhang Chenchen Xi 

机构地区：[1]Institute of Road Engineering,Zhejiang Scientific Research Institute of Transport,Hangzhou,310023,China [2]Department of Architecture and Civil Engineering,Zhejiang University,Hangzhou,310027,China [3]Department of Computer Science,Boise State University,Boise,83725-1145,USA

出　　处：《Journal of Renewable Materials》2022年第5期1321-1335,共15页可再生材料杂志（英文）

基　　金：The authors would like to acknowledge the Science Technology Department of Zhejiang Province(Grant Nos.2018F10045 and 2021C01106)for the funding support and the technical guidance in 3D laser scanning by Dr.Fengxia Chi from the Institute of Road Engineering of Zhejiang Scientific Research Institute of Transport;The constant of this paper reflects the views of authors,who are responsible for the facts and the accuracy of the data shown herein.The authors gratefully acknowledge their financial and technical supporting.

摘　　要：Titanium dioxide(TiO_(2))was recently employed to apply onto road surfaces to degrade the harmful compounds from vehicle emissions.However,it remains a challenging task to find a highly compatible pavement type for TiO_(2)application to achieve durable and efficient air-purifying performance.This study proposed to coat TiO_(2)particles onto semi-flexible pavement surface and tried to investigate an optimum coating method.Three coating methods,including direct mixing TiO_(2)(MT)with asphalt mixture,spraying dry TiO_(2)(ST)coating and watersolution-based TiO_(2)(WT)coating on semi-flexible pavement surface.To achieve this objective,semi-flexible samples were prepared to evaluate and compare the performances of three coating methods by employing resistance to wearing,NO removal efficiency tests and residual texture depth tests.It was found that the ST method not only provided better NO degrading efficiency but also improved the resistance to wearing than the other two methods.

关 键 词：Titanium dioxide air-purifying performance semi-flexible pavement coating methods 

分 类 号：X51[环境科学与工程—环境工程] TB383[一般工业技术—材料科学与工程]