混凝土对水溶性渗透结晶材料吸收特性的动力学研究  

Dynamic study on concrete absorption of water-soluble permeable crystal infiltration materials

作　　者：张祥富 岳金文 袁涛 李杨 周世华[2] 石妍[2] ZHANG Xiangfu;YUE Jinwen;YUAN Tao;LI Yang;ZHOU Shihua;SHI Yan(Hunan Pingjiang Pumped Storage Power Station Co.,Ltd.,Yueyang 414000,China;Yangtze River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]湖南平江抽水蓄能有限公司,湖南岳阳414000 [2]长江水利委员会长江科学院,湖北武汉430010

出　　处：《混凝土》2023年第12期166-169,174,共5页Concrete

基　　金：国家自然科学基金“长江中上游大坝混凝土耐久性提升理论与方法研究”(U2040222);中央级公益性科研院所基本科研业务费“基于均匀化理论的水工混凝土弹性模量多尺度计算研究”(CKSF2021456/CL);水利部示范项目“基于渗透结晶原理的输水建筑物裂缝修复与防护技术集成示范”(SF-2021-02)。

摘　　要：渗透结晶材料对混凝土具有较好的裂纹修补能力和损伤修复效果。借助吸水动力学方法,比较混凝土对水和吸水溶性渗透结晶(DPS)材料吸收性能的差异,研究了混凝土对DPS材料的吸收特性。结果表明:混凝土对水和DPS材料都具有相似的吸收规律,但DPS材料的饱和吸收率小于水。混凝土吸收DPS材料的动力学参数随养护龄期延长而降低,动力学参数与混凝土养护龄期之间有较好的对数函数关系。DPS材料在混凝土养护初期的吸收效果较好,长龄期有所降低,但DPS材料喷洒后4 h内需注意混凝土表面保湿,并适当延长高强度等级混凝土的保湿时间。Crystal infiltration materials could enhance self-healing ability of concrete.It focuses on the absorption properties of concrete to water and water-soluble crystal infiltration materials,which are also named as DPS materials,using water absorption kinetics method as the main analysis route.It is revealed that concrete has similar absorption laws to both water and DPS materials,but the saturated absorption rate of DPS materials is slightly lower than that of water.Moreover,absorption kinetic parameters of concrete to DPS materials decrease with the curing age,and there is a good logarithmic function relationship between the kinetic parameters and curing age.Conclusions can be drawn that DPS material has a better penetration effect in initial stage of concrete curing,and concrete surface should be kept moisture after DPS material sprayed 4 hours.

关 键 词：渗透结晶 混凝土 孔结构 吸水动力学 

分 类 号：TU528.041[建筑科学—建筑技术科学]