Gas permeability of partially saturated cement-based materials considering water sensitivity

被引:0
|
作者
Zhu, Pinghua [1 ]
Zhang, Xudong [1 ,2 ]
Song, Yang [1 ,2 ]
Sheng, Yanmin [2 ]
Zhao, Li [2 ]
Ge, Pei [2 ]
Wang, Chuanrui [3 ]
机构
[1] Changzhou Univ, Sch Urban Construct, Changzhou 213164, Peoples R China
[2] Changzhou Inst Technol, Sch Civil Engn Architecture, Changzhou 213032, Peoples R China
[3] Univ Lille, CNRS, Cent lille, LaMcube, Lille, France
基金
中国国家自然科学基金;
关键词
Cement-based materials; Gas permeability; Nuclear magnetic resonance; Water sensitivity; Partially saturated; PORE STRUCTURE CHARACTERIZATION; QUANTITATIVE CHARACTERIZATION; LIQUID WATER; CONCRETE; CHLORIDE; PASTE; IONS; DIFFUSIVITY; PARAMETERS; POROSITY;
D O I
10.1016/j.conbuildmat.2024.138641
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Gas permeability is a crucial factor influencing the durability of cement-based materials, which are usually in a partially saturated state. This study examines the impact of the water-to-cement (w/c) ratio, water saturation and water sensitivity on the gas permeability of cement-based materials using Nuclear Magnetic Resonance (NMR) and Mercury Intrusion Porosimetry (MIP). The results indicate that the gas permeability of cement-based materials is strongly related to their porosity and pore size distribution. Relative gas permeability is directly influenced by water saturation and the initial state of the materials, with a noticeable hysteresis effect observed. Furthermore, the water sensitivity of cement-based materials results in no evident, but a slight decrease in gas permeability during water saturation.
引用
收藏
页数:16
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