引气剂对隧道防火涂料抗冻融性能影响的研究  

Study on the Influence of Air-entraining Agent on the Freeze-thaw Resistance of Tunnel Fireproof Coatings

作　　者：吕官记 季韬[2] 廖聪[2] LYU Guanji;JI Tao;LIAO Cong(Department of Management Engineering,Fujian Business University,Fuzhou 350116,China;School of Civil Engineering,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福建商学院管理工程系,福州350012 [2]福州大学土木工程学院,福州350116

出　　处：《武汉理工大学学报（交通科学与工程版）》2020年第6期1027-1031,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：十二五国家科技支撑计划项目(2012BAJ14B05);福建省科技计划项目(2020J01325)资助。

摘　　要：隧道防火涂料(简称“涂料”)抗冻融性能对其粘结性和耐久性有重要影响.文中研究了冻融循环下引气剂对涂料质量损失率、粘结强度、损伤度的影响规律,并采用氮吸附法和Matlab图像处理技术对涂料孔结构(微观孔和宏观孔)进行研究.研究表明:引气剂掺量增大时,涂料初始粘结强度减小,涂料微观孔体积减小,宏观孔隙平均直径和孔隙率均增大.相同冻融循环下,随着引气剂掺量增加,涂料微观孔体积和宏观孔平均直径减小;其掺量大于0.015%时,涂料抗冻融性能提高不明显.引气剂在涂料中的最优掺量为0.015%.The freeze-thaw resistance of tunnel fireproof coatings has an important influence on its adhesion and durability.The influence of air entraining agent on the mass loss rate,bond strength and damage degree of coatings under freeze-thaw cycle was studied,and the pore structure(micro-pore and macro-pore)of coatings was studied by nitrogen adsorption method and Matlab image processing technology.The results show that with the increase of air entraining agent content,the initial bonding strength of the coating decreases,the micro pore volume of the coating decreases,and the average diameter and porosity of macro pores increase.Under the same freeze-thaw cycle,with the increase of air-entraining agent content,the micro-pore volume and macro-pore average diameter of the coating decrease.When the content is more than 0.015%,the frost resistance of the coating is not obviously improved.The optimum content of air entraining agent in coating is 0.015%.

关 键 词：隧道防火涂料 引气剂 孔结构 冻融循环 粘结性 

分 类 号：U414.101[交通运输工程—道路与铁道工程]