Impact of chloride-rich environments on cement paste mineralogy

Isabel Galan, Lucie Perron, Fredrik P. Glasser

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Chloride is widely present in the service environment in which Portland cement concretes are used. High local concentrations of chloride can develop by wicking and evaporation, as for example in splash zones. The parallel sequence of mineralogical changes with increasing chloride forms Friedel's salt and subsequently, compounds containing Ca(OH)2, CaCl2 and H2O in ratios 3:1:12 and 1:1:0. New X-ray and thermal analysis data are presented for these phases. Their phase equilibria are presented and it is shown that Ca(OH)2 coexists with 3:1:12 at least up to 55 °C. It is suggested that the low physical density of 3:1:12, 1.62 g/cm3, and high water content contribute to the potential for expansion attending its formation in hardened matrices.

Original languageEnglish
Pages (from-to)174-183
Number of pages10
JournalCement and Concrete Research
Volume68
DOIs
Publication statusPublished - 2015
Externally publishedYes

Fingerprint

Mineralogy
X ray analysis
Portland cement
Ointments
Phase equilibria
Thermoanalysis
Water content
Chlorides
Cements
Evaporation
Concretes
Salts

Keywords

  • Cement paste (D)
  • Chloride (D)
  • Degradation (C)
  • Durability (C)
  • Expansion (C)

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

Cite this

Impact of chloride-rich environments on cement paste mineralogy. / Galan, Isabel; Perron, Lucie; Glasser, Fredrik P.

In: Cement and Concrete Research, Vol. 68, 2015, p. 174-183.

Research output: Contribution to journalArticleResearchpeer-review

Galan, Isabel ; Perron, Lucie ; Glasser, Fredrik P. / Impact of chloride-rich environments on cement paste mineralogy. In: Cement and Concrete Research. 2015 ; Vol. 68. pp. 174-183.
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