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

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2024年 / 450卷

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

页数：16

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