Fractal Study on the Evolution of Micro-Pores in Concrete Under Freeze-Thaw  

作　　者：孙浩然 邹春霞 XU Deru GUO Xiaosong HUANG Kun SUN Haoran;ZOU Chunxia;XU Deru;GUO Xiaosong;HUANG Kun(College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;Xi’an HaiTang Vocational College,Xi’an 710038,China)

机构地区：[1]College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China [2]Xi’an HaiTang Vocational College,Xi’an 710038,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第1期109-117,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Key Project of Science and Technology Research in Higher Educational Institutions of Inner Mongolia Autonomous Region (No.NJZZ22518);Inner Mongolia Natural Science Foundation Project (No.2022MS05043);Inner Mongolia Autonomous Region Water Conservancy Research Special Project(No.NSK2016-S11)。

摘　　要：After exposure to freeze-thaw cycles, scanning electron microscopy(SEM) and nuclear magnetic resonance(NMR) were used to test the four mixtures. The microstructure is qualitatively analyzed from the 2D SEM image and the 3D pore distribution curve before and after freezing and thawing. The fractal dimension is utilized to characterize the two-dimensional topography image and the three-dimensional pore distribution, quantitatively. The results reveal that the surface porosity and volume porosity increase as the freeze-thaw action increases. Self-similarity characteristics exist in micro-damage inside the concrete. In the fractal dimension, it is possible to characterize pore evolution quantitatively. The fractal dimension correlates with pore damage evolution. The fractal dimension effectively quantitatively characterizes micro-damage features at various scales from the local to the global level.

关 键 词：fractal dimension freeze-thaw cycle CONCRETE SEM NMR 

分 类 号：TU528.01[建筑科学—建筑技术科学]