The Effect of Different Freeze-Thaw Cycles on Mortar Gas Permeability and Pore Structure

被引：1

作者：

Chen, Wei ^{[1
]}

Xu, Ao ^{[1
]}

Zhang, Hejun ^{[1
]}

Sheng, Mingquan ^{[1
]}

Liang, Yue ^{[1
]}

Skoczylas, Frederic ^{[2
]}

机构：

[1] Hubei Univ Technol, Sch Civil Engn Architecture & Environm, Wuhan, Peoples R China

[2] Univ Lille, CNRS, Cent Lille, UMR9013,LaMcube Lab Mecan Multiphys & Multiechelle, Lille, France

来源：

FDMP-FLUID DYNAMICS & MATERIALS PROCESSING | 2023年 / 19卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Mortar; freeze; thaw cycles; gas permeability; pore structure; NMR; mechanical properties; OXYGEN PERMEABILITY; CONCRETE; STRENGTH; DURABILITY; ABSORPTION;

D O I：

10.32604/fdmp.2023.025083

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two different freeze-thaw cycles (FTC) are considered in this study to assess the related impact on gas permeability and micro-pore structure of a mortar. These are the water-freezing/water-thawing (WF-WT) and the air-freezing/air-thawing (AF-AT) cycles. The problem is addressed experimentally through an advanced nuclear magnetic resonance (NMR) technique able to provide meaningful information on the relationships among gas permeability, pore structure, mechanical properties, and the number of cycles. It is shown that the mortar gas permeability increases with the number of FTCs, the increase factor being 20 and 12.83 after 40 cycles for the WF-WT and AF-AT, respectively. The results also confirm that gas permeability hysteresis phenomena occur during the confining pressure loading and unloading process.

引用

页码：1623 / 1636

页数：14

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