黑龙江科技大学学报2023，Vol.33Issue(6)：869-874,881,7.DOI:10.3969/j.issn.2095-7262.2023.06.015
冻融循环下红砂岩的微观孔隙结构与分形特征
Microscopic pore structure and fractal characteristics of red sandstone under freeze-thaw cycle
摘要
Abstract
This paper is an effort to investigate the evolution law behind the internal microscopic pore structure of red sandstone under freeze-thaw action.The study conducts freeze-thaw cycle test,mercury injection test and CT scan test,and analyzes the pore structure and fractal characteristics of red sandstone under freeze-thaw cycle based on image processing technology and fractal theory.The experimental results show that with the increase of freeze-thaw times,the most prominent change characteristics in the red sandstone is the number increase of the big pores,along with the continuely enhanced pore distribution curve,the increased pore connectivity,and the increased porosity by exponential function;The CT image is binarized by the optimal threshold value,and the statistical porosity of red sandstone is obtained by taking the"area"of micro pores,fractures and other defects as the parameter;The fractal dimension of red sandstone pores calculated by the box dimension method decreases with the increase of freeze-thaw times;The porosity of red sandstone is predicted by Menger sponge model,and the exponential function relationship exists between porosity and fractal dimension by analyzing data regression.关键词
冻融循环/微观孔隙结构/孔隙度/分形维数Key words
freeze-thaw cycle/microscopic pore structure/porosity/fractal dimension分类
建筑与水利引用本文复制引用
兰永伟,张泽晨,高宏伟..冻融循环下红砂岩的微观孔隙结构与分形特征[J].黑龙江科技大学学报,2023,33(6):869-874,881,7.基金项目
黑龙江省自然科学基金项目(LH2019D011) （LH2019D011）
黑龙江省省属高等学校基本科研业务费项目(2020-KYYWF-0691) （2020-KYYWF-0691）
