混凝土界面过渡区不均匀特性研究_陈露一.pdf

29 　9 武　汉　理　工　大　学　学　报 Vol.29 　No.9 2007 9 JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY 　Sep.2007 1 2 3 4 陈露 一,郑志河 ,邵慧权 , 范鹏云 (1., 430070;2., 024000;3., 028000;4., 024000) 　:　在新拌混凝土制备过程中, 因混凝土内部的微泌水效应和宏观泌水作用会对处于不同 置的骨料周围区域内 产生水分的不均匀分布, 进而影响界面过渡区的均匀性。利用显微硬度测试技术研究了混凝土界面过渡区的不均匀特 性。结果表明, 单骨料上、下以及侧面等不同界面处显微硬度值存在较大差别, 其中上界面显微硬度值最大。表层骨料 周围界面过渡区宽度略大于内部骨料界面过渡区;硅灰的掺加能明显改善混凝土界面过渡区的不均匀性。 :　界面过渡区;　不均匀性;　显微硬度;　硅灰 :　T U 528 :　A :1671-4431(2007)09-0 111-04 Research on Asymmetry of Interfacia Transition Zone in Concrete 1 2 3 4 CHEN Lu -y i , ZHEN G Zh i-he , S HA O H u i-quan ,F AN P eng -y un (1.Key Laboratory of Silicate M aterial Science and Engineering of Mini try of Education, Wuhan Univer ity of Technology, Wuhan 430070, China;2.Chifeng Ke hiketengqi Highw ay M anagement Work A rea of Inner Mo ngolia, Chifeng 024000, China;3.Tongliao T raffic Planning and De ig n In titute of Inner Mongolia, Tongliao 028000, China;4.Chifeng Highway Engineering Quality Supervi ing Statio n of Inner Mongolia, Chifeng 024000, China) Abstract:　In the preparation proce of fre h concrete, there i an uneven w ater di tribution develop around the aggreg ate particle .T he micro-bleeding and macro-bleeding during ca ting, can influence the y mmetry of the interfacial tran ition zone (IT Z).T hi paper pre ented the a y mmetry of the ITZ by mean of the microhardne te ting .T he re ult howed that there wa a di tingui hed difference for the microhardne of the top, bottom and profile of a ingle aggreg ate, and the top face micro- hardne wa the big ge t.T he IT Z of aggregate located in the near-urface region