Investigation of chloride penetration in carbonated reactive magnesia cement mixes exposed to cyclic wetting-drying

Sanjeev Kumar, En-Hua Yang, C Unluer

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of chloride attack on carbonated reactive MgO cement (RMC) samples containing fly ash (FA) and ground granulated blast-furnace slag (GGBS) under cyclic wetting and drying was studied. Porosity, sorptivity and chloride profile observations were carried out in parallel to the XRD, TGA and SEM analyses performed before and after exposure. Inclusion of SCMs increased the resistance of RMC samples by lowering the porosity and leading to the formation of various phases such as bischofite, hydrotalcite and calcite, in addition to Mg-carbonates. Mg-carbonate phases such as hydromagnesite and artinite remained relatively stable, whereas a small reduction in nesquehonite content was observed after exposure. Resulting formulations presented improved durability and lower environmental impacts.
Original languageEnglish
Article number122837
Pages (from-to)1-8
Number of pages8
JournalConstruction and Building Materials
Volume284
DOIs
Publication statusPublished - 17 May 2021

Keywords

  • carbonation
  • chloride ingress
  • cyclic wetting and drying
  • reactive magnesia cement
  • SCMs

Fingerprint

Dive into the research topics of 'Investigation of chloride penetration in carbonated reactive magnesia cement mixes exposed to cyclic wetting-drying'. Together they form a unique fingerprint.

Cite this