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.
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)
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)。
