On the moisture migration of concrete subject to high temperature with different heating rates

Lei Shen*, Francesco Lo Monte, Giovanni Di Luzio, Gianluca Cusatis, Weixin Li, Roberto Felicetti, Federico Lombardi, Maurizio Lualdi, Maosen Cao, Qingwen Ren

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A better understanding of moisture migration in concrete at high temperature can play an important role to improve the fire-resistance and radiation-shielding capability of concrete structures. In this regard, within the numerical framework of Multi-physics Lattice Discrete Particle Model, the moisture clog in concrete during heating is defined as the moisture-saturated region between the so-called “water front” and “water back” (isosurfaces of saturation = 1). The moisture migration in concrete subject to slow and fast heating has been investigated by simulating experimental tests in which moisture has been monitored via different techniques, namely 3D Neutron Tomography and Ground-Penetrating Radar. An overall consistency between experimental and numerical results has been observed, indirectly proving the effectiveness of numerical modelling and experimental monitoring of moisture migration.

Original languageEnglish (US)
Article number106492
JournalCement and Concrete Research
Volume146
DOIs
StatePublished - Aug 2021

Keywords

  • High temperature
  • Hygro-thermo-mechanical coupling
  • Lattice discrete particle model
  • Moisture migration
  • Plain concrete

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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