The role of porosity on degradation of concrete under severe internal and external brine attack in confined conditions

G. Lifshitz Sherzer*, G. Ye, E. Schlangen, K. Kovler

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
18 Downloads (Pure)

Abstract

It has been observed that a trench wall embedded in the soil of the Dead Sea has lost strength and is deteriorating due to brine attack. This phenomenon demonstrates that concrete wall structural stability and durability can be seriously endangered. Yet conventional analysis using macroscopic models is considered an oversimplification, as it neglects the existing micro-cracking and other nonlinearities that are endemic to such deterioration. The current study describes a multiscale formulation for estimating the anticipated reduction in strength of a concrete wall exposed to both external and internal briny water. Our methodology provides an upscale formulation to predict concrete response under aggressive environmental and partially confined conditions. The proposed method uses the concept of a “fictitious” water-to-cement (w/c) ratio to express the microstructural changes that cause an increase in material porosity, thus reflecting the material's degradation through leaching. Simulation results indicate that under the partially confined conditions representing actual ground pressure, the trench wall will remain stable for a service life of 40 years. Furthermore, the proposed model was experimentally calibrated and validated and found in agreement with experimental results.

Original languageEnglish
Article number127721
Number of pages14
JournalConstruction and Building Materials
Volume341
DOIs
Publication statusPublished - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Brine attack
  • Confinement
  • Durability
  • Multiscale analysis
  • Service life
  • Strength

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