摘要
为提供一种可用于隧道管片破损及裂缝修补的高效修补材料,研发一种高强、高黏结性的水性环氧树脂改性水泥砂浆,研究改性砂浆抗折强度、抗压强度和黏结强度,并采用SEM等方法进行微观结构分析。试验结果表明：1）随聚灰比增大,抗折强度和抗压强度先增大后减小;2）在研究范围内,黏结强度随聚灰比的增加而减小;3）改性后砂浆黏结强度增大20%~40%。
A kind of modified aqueous epoxy mortar with high performance and high bond strength for rehabilitation of tunnel segment cracks is developed. The properties of the mortar,including flexural strength,compressive strength and bond strength,are studied; then the microstructure of the mortar is analyzed by means of scanning electron microscope（ SEM）method. The testing results show that： 1） The flexural strength and compressive strength increase with the polymer-cement ratio increases; and then they decrease at a peak. 2） The bond strength decreases with the polymer-cement ratio increases.3） Compared to the traditional mortar,the bond strength of modified mortar increases by 20%-40%.
出处
《隧道建设》
北大核心
2016年第4期398-402,共5页
Tunnel Construction
基金
江苏省建设厅项目(2013ZD12)
江苏省六大人才项目(JZ-010)
无锡地铁项目(JS-201400361001)
关键词
管片修补
改性砂浆
黏结强度
微观分析
隧道裂缝
segment rehabilitation
modified mortar
bond strength
microcosmic analysis
tunnel crack
