冻融循环下隧道防火涂料粘结性能研究  

Research for bonding behavior of tunnel fireproof coating under freeze-thaw cycles

作　　者：廖聪[1] 季韬[1] 江其东 

机构地区：[1]福州大学土木工程学院,福建福州350116 [2]福建同利建材科技有限公司,福建福州350001

出　　处：《福州大学学报（自然科学版）》2015年第2期245-248,共4页Journal of Fuzhou University(Natural Science Edition)

基　　金：十二五国家科技支撑计划资助项目(2012BAJ14B05);福建省高校产学合作科技重大项目(2013H6013)

摘　　要：采用快速冻融试验机和孔结构分析仪等,分别从宏观和微观角度研究隧道防火涂料冻融后的粘结性能.聚丙烯纤维可减缓冻融循环下隧道防火涂料的剥落,有益于行车安全.冻融循环15、30、45和60次时,隧道防火涂料可测得的最小孔径依次为14.8、8.6、8.0和7.3 nm,累计孔体积分别为9.34、18.61、20.72和22.83μL·g-1.随着冻融循环次数的增加,隧道防火涂料粘结强度损失增大、孔径恶化.在冻融循环的前30次,隧道防火涂料粘结性能降低显著,而后降低不明显.The bonding property of tunnel fireproof coating （ TFC ） after freeze - thaw cycles was stud- ied by a rapid freeze -thaw testing machine （macro test） and a pore structural analyzer （micro test） et al. Polypropylene fibers could retard the peeling of TFC under freeze - thaw cycles, which was ben- eficial for the safety of tunnel transportation. When the numbers of freeze - thaw cycles were 15, 30, 45, 60 respectively, the minimum porosity of TFC that could be measured were 14.8, 8.6, 8.0 and 7.3 nm respectively, and the cumulative pore volumes of TFC were 9.34, 18. 61, 20.72 and 22.83 μL·g-1, respectively. With the increase of the number of freeze - thaw cycles, the loss of bonding strength of TFC increased, and the pore structure of TFC deteriorated. Therefore, the bonding behavior of TFC reduced evidently in the first 30 freeze - thaw cycles, and then the decrease of TFC＇ s bonding behavior was not obvious.

关 键 词：隧道防火涂料 冻融循环 粘结性能 孔结构 聚丙烯纤维 

分 类 号：TU545[建筑科学—建筑技术科学]