Computational modeling of temperature and relative humidity effects on concrete expansion due to alkali–silica reaction

Lifu Yang, Madura Pathirage, Huaizhi Su*, Mohammed Alnaggar, Giovanni Di Luzio, Gianluca Cusatis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

This paper presents a constitutive model for the simulation of temperature and relative humidity effects on concrete expansion due to Alkali–Silica Reaction (ASR). The model was formulated within the multiphysics framework of the Lattice Discrete Particle Model (LDPM). LDPM simulates concrete internal structure at the mesoscale defined as the length scale of coarse aggregate pieces. As such it accounts for the heterogeneous character of ASR expansion, cracking and damage, creep, hygrothermal deformation as well as moisture transport and heat transfer. The overall framework was calibrated and validated by comparing several numerical simulations with a large database of experimental data gathered from the literature. The proposed model is able to capture accurately all available experimental evidence, including: (a) the increase of expansion rate for increasing temperature and its marked decrease for decreasing relative humidity; and (b) both increase or decrease of ASR ultimate expansion as function of temperature.

Original languageEnglish (US)
Article number104237
JournalCement and Concrete Composites
Volume124
DOIs
StatePublished - Nov 2021

Keywords

  • Alkali–silica reaction
  • Expansion
  • Experimental database
  • LDPM
  • Relative humidity
  • Temperature

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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