Cement Composition and Sulfate Attack: Part I

Four cements were used to address the effect of tricalcium silicate content of cement on external sulfate attack in sodium sulfate solution. The selected cements had similar fineness and Bogue-calculated tricalcium aluminate content but variable tricalcium silicates. Durability was assessed using linear expansion and compressive strength. Phases associated with deterioration were examined using scanning electron microscopy and X-ray diffraction. Mineralogical phase content of the as-received cements was studied by X-ray diffraction with 2 methods: internal standard and Rietveld analysis. Results indicate that phase content of cements determined by X-ray mineralogical analysis correlates better with the mortar performance in sulfate environment than Bogue content. Additionally, it was found that in cements containing triclacium aluminate only in cubic form, the observed deterioration is affected by tricalcium silicate content. Morphological similarities between hydration products of high tricalcium aluminate and high tricalcium silicate cements exposed to sodium sulfate environment were also noted.

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  • Supplemental Notes:
    • Abstract reprinted with permission from Elsevier
  • Authors:
    • Shanahan, Natalya
    • Zayed, Abla
  • Publication Date: 2007-4

Language

  • English

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Filing Info

  • Accession Number: 01050170
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 25 2007 6:45PM