文献类型：期刊文献

英文题名：Investigation on Pore Structure and Permeability of Concrete-Rock Interfacial Transition Zones Based on Fractal Theory

作者：Yue, Juan[1];Sheng, Jinchang[1];Wang, Huimin[1];Hu, Yunjin[2];Zhang, Kailai[1];Luo, Yulong[1];Zhou, Qing[1];Zhan, Meili[1]

机构：[1]Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China

年份：2022

卷号：6

期号：6

外文期刊名：FRACTAL AND FRACTIONAL

收录：SCI-EXPANDED(收录号：WOS:000818429000001)、、Scopus(收录号：2-s2.0-85132401302)、WOS

基金：This research was funded by National Natural Science Foundation of China under Grant No. 51579078, 51679070, Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province under Grant No. PCMGH-2017-Z-02, Basic Research Youth Innovation Intersection Team of Qinghai Institute of Salt Lakes, Chinese Academy of Sciences under Grant No. ISLJCTD-2022-2, and HunanWater Conservancy Science and Technology Project under Grant No. XSKJ2021000-35, XSKJ2019081-04.

语种：英文

外文关键词：concrete-rock ITZ; pore structure; permeability; fractal theory

外文摘要：The concrete-rock interfacial transition zone (ITZ) is generally considered the weak layer in hydraulic engineering, for it is more permeable than the intact concrete or rocks. The water permeability of the ITZ is a critical parameter concerned with structural safety and durability. However, the permeability and pore structure of the ITZ has not been investigated previously, and the mathematical model of ITZ permeability has not been established. This study performed multi-scale experiments on the concrete-rock ITZ with various rock types (limestone, granite, and sandstone). A series of quantitative and qualitative analysis techniques, including NMR, SEM-EDS, and XRD, characterize the ITZ pore structures. The controlled constant flow method was used to determine the permeability of the concrete, rock, and ITZ. The mathematical model of ITZ permeability was proposed using the fractal theory. The consistency between the experimental data and the proposed model indicates the reliability of this study. The results of the experiment show that ITZ permeability is between 4.08 x 10(-18) m(2) and 5.74 x 10(-18) m(2). The results of the experiment and the proposed model could determine ITZ permeability in hydraulic structure safety and durability analysis.