Experimental characterisation of transient condensed water vapour migration through cracked concrete as revealed by neutron and x-ray imaging: Effect of initial saturation

被引：11

作者：

Gupta, Ritesh ^{[1
]}

Lukic, Bratislav ^{[2
]}

Tengattini, Alessandro ^{[1
,3
]}

Dufour, Frederic ^{[1
]}

Briffaut, Matthieu ^{[4
]}

机构：

[1] Univ Grenoble Alpes, CNRS, Grenoble INP, 3SR, F-38000 Grenoble, France

[2] European Synchrotron Radiat Fac, F-38043 Grenoble 9, France

[3] Inst Laue Langevin, 71 Ave Martyrs,CS 20156, F-38042 Grenoble 9, France

[4] Univ Lille, LaMcube Lab mecan Multiphys & Multiechelle, CNRS, Cent Lille,UMR9013, F-59000 Lille, France

来源：

CEMENT AND CONCRETE RESEARCH | 2022年 / 162卷

关键词：

Neutron and x-ray imaging; Two-phase flow; Cracked concrete; Capillarity; Condensed water migration; AIR-STEAM MIXTURE; FLUID-FLOW; PERMEABILITY; VISUALIZATION; PENETRATION; DURABILITY; PRESSURE; MEDIA;

D O I：

10.1016/j.cemconres.2022.106987

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Understanding the migration of high-temperature fluids through the porous medium of cement-based materials has a pivotal role in many engineering applications. The space and time evolution of the free water content and the crack network in these materials creates a complex migration process. In this work, we experimentally investigate water vapour migration in pre-cracked porous media of dry and saturated initial saturation states. Besides studying the mean temperature and pressure evolution, we quantify the rapid spatial distribution of the condensed water operando through high-speed neutron radiography. The associated physical phenomena for the condensed water migration into the porous media is reported one order of magnitude stronger in the dry sample. Combined features of neutron and x-ray tomographies enable the 3D quantification of condensed water distribution. This unique data set aims to provide a novel database for the multi-physics modelling of two-phase fluid flow in cracked media for varying initial saturation.

引用

页数：14

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