Open Access

ARTICLE

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

by Wei Chen^1,*, Ao Xu¹, Hejun Zhang¹, Mingquan Sheng¹, Yue Liang¹, Frederic Skoczylas²

1 School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, China
2 CNRS, Centrale Lille, UMR9013-LaMcube-Laboratoire de Mécanique Multiphysique et Multiéchelle, Université de Lille, Lille, France

* Corresponding Author: Wei Chen. Email:

(This article belongs to the Special Issue: Advances in Fluid Dynamics and Functional Materials)

Fluid Dynamics & Materials Processing 2023, 19(6), 1623-1636. https://doi.org/10.32604/fdmp.2023.025083

Received 21 June 2022; Accepted 02 September 2022; Issue published 30 January 2023

Abstract

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.

---

Keywords

---