水利工程流道混凝土结构修复材料及应用  

Repair material of concrete structures and its application to hydraulic flow channels

作　　者：崔懂文 张贵金[1,2] 范明 赵雪瑜 CUI Dongwen;ZHANG Guijin;FAN Ming;ZHAO Xueyu(School of Hydraulic Engineering,Changsha University of Science&Technology,Changsha 410114;Key Laboratory of Water&Sediment Science and Water Hazard Prevention of Hunan Province,Changsha 410114;Changsha Puzhao Biochemical Technology Co.,Ltd.,Changsha 410007)

机构地区：[1]长沙理工大学水利工程学院,长沙410114 [2]水沙科学与水灾害防治湖南省重点实验室,长沙410114 [3]长沙普照生化科技有限公司,长沙410007

出　　处：《水力发电学报》2021年第1期24-31,共8页Journal of Hydroelectric Engineering

基　　金：湖南省重大水利科技项目[湘水科计(2017)230-37]。

摘　　要：水工流道混凝土冲蚀破坏十分常见,现有修复材料难以获得耐久性良好的修复结构。为达到更好的修复效果,通过室内试验对研发的组合修复材料进行水工环境下的力学性能、抗冲磨性能及热相容性测试;进行修复结构力学分析,最后在工程引水流道和溢流面进行了现场修复试验。结果表明:环氧界面剂与原混凝土之间的湿黏结强度达3.95 MPa,水下抗冲磨砂浆抗压强度达85.99 MPa,在柔性纳米陶瓷涂料保护下抗冲磨强度可达2545.2 h/(kg/m^2),优于国内已有其他同类修复材料;与混凝土相容性好,可在高低温环境中适应混凝土的变形;该组合材料修复结构在-20℃~40℃环境下不会发生开裂或剥离破坏,结构整体性良好;现场修复效果良好,经过多次泄洪后,表面未出现任何明显损伤,可推广应用于同类工程。Erosion damage to concrete structures is often observed in various flow channels,and usually using existing repair materials cannot insure a good durability of the repaired structure.To achieve better repair effect,we develop new composite materials and conduct laboratory tests on their abrasion resistant properties,thermal compatibility,and mechanical properties under hydraulic environment.Mechanical analysis of the repaired structures and field repair tests of a diversion channel and an overflow surface have been carried out.The results show that our new composite materials achieve better performances than the other similar materials in China–wet adhesive strength of up to 3.95 MPa between epoxy interface agent and original concrete,compressive strength of underwater abrasion resistant mortar of up to 85.99 MPa,and abrasion resistant strength of up to 2545.2 h/(kg/m^2)when protected with a flexible nano-ceramic coating.And they have good compatibility with concrete and can adapt to the deformation of concrete both in high and low temperature environments;in the range of-20℃~40℃,the structures repaired using them will not crack or be corroded,keeping structural integrity.The site repair effect is considerably fine,and no obvious damage to the surface has been observed after sufficient times of flood discharge.Thus,we suggest that these new composite materials be widely applied to similar projects to achieve a good durability and better effect of concrete structure repair.

关 键 词：水工材料 组合修复材料 抗冲磨砂浆 适用性 冲磨和空蚀 

分 类 号：TV49[水利工程—水工结构工程]