湿养护方式对混凝土表面电阻率影响的试验研究  

Experimental Study on Influence of Wet Curing Method on the Concrete Surface Resistivity

作　　者：牛维宏 徐清[1] 党玉栋[2] 宋进平 张凯 马忍 NIU Wei-hong;XU Qing;DANG Yu-dong;SONG Jin-ping;ZHANG Kai;MA Ren(School of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650504,China;Yunnan Key Laboratory of Building Structure and New Materials,Yunnan Institute of Building Research,Kunming 650223,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650504 [2]云南省建筑科学研究院云南省建筑结构与新材料企业重点实验室,云南昆明650223

出　　处：《中北大学学报（自然科学版）》2020年第6期538-542,549,共6页Journal of North University of China(Natural Science Edition)

基　　金：中国博士后科学基金项目(2016M592723)。

摘　　要：为探究湿养护方式对混凝土表面电阻率的影响,对C30无筋混凝土及C30钢筋混凝土在不同湿养护方式下,表面电阻率随养护龄期的增长进行测试,研究了不同湿养护方式对混凝土表面电阻率的影响规律.结果表明:湿养护时间与混凝土表面电阻率呈负相关,湿养护时间越长,混凝土表面电阻率变化幅度越小.钢筋保护层厚度对混凝土表面电阻率有影响,但混凝土表层水分是否充足对其表面电阻率影响较大.在湿养护充分的条件下,表面电阻率随养护龄期的增长,其变化幅度较小且变化相对平缓.To explore the effect of wet curing methods on the surface resistivity of concrete,the paper mainly analyzed surface resistivity of C30plain concrete and C30reinforced concrete under different wet curing modes with curing age,which revealed the influence of different wet curing methods on the surface resistivity of concrete.The results show that the wet curing time is negatively correlated with the concrete surface resistivity,the longer the wet curing time,the smaller the change of concrete surface resistivity.The thickness of the steel bar protective layer has an effect on the surface resistivity of the concrete,but whether the surface water of the concrete is sufficient has a great influence on its surface resistivity.Under the condition of sufficient wet curing,the surface resistivity increases with the curing age,the amplitude of change is small and relatively flat.

关 键 词：混凝土 湿养护方式 养护龄期 表面电阻率 

分 类 号：TU528.1[建筑科学—建筑技术科学]