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Materials and Structures

, Volume 23, Issue 6, pp 412–417 | Cite as

Influence of sea water solution on mortar containing calcium carbonate

  • Vanagis Ramachandran
  • Rolff Feldman
  • James J. Beaudoin
Article

Abstract

Normal Portland cement mortar discs containing precipitated or ground limestone at dosages of 0, 2.5, 5 and 15% were made at water/cement ratios of 0.42 or 0.60. They were hydrated in lime water or sea water solution for periods up to 1 year. The length and modulus of elasticity changes were monitored periodically. Some mortars containing CaCO3 exhibited more than three times the expansion of the reference in sea water. The expansions were greater in samples containing fine CaCO3. The modulus of elasticity was especially low for samples containing precipitated CaCO3 and exposed to sea water.

Keywords

Compressive Strength CaCO3 Calcium Carbonate Precipitate Calcium Carbonate Tricalcium Silicate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

On a confectionné des disques de mortier de ciment Portland normal contenant du calcaire, à des dosages de 0, 2,5, 5 et 15%, les rapports eau/ciment étant de 0,42 ou 0,60. Leur hydratation a été réalisée dans de l'au de chaux ou dans une solution d'eau de mer pour des cycles allant jusqu' à une année. On a contrôlé périodiquement la longueur et le module d'élasticité.

On a constaté sur certains mortiers contenant du CaCO3 une dilatation plus de trois fois supérieure à celle de l'échelle de référence dans l'eau de mer, la dilatation étant plus forte dans les éprouvettes contenant du CaCO3 fin. Les éprouvettes renfermant du CaCO3 précipité, qui avaient été exposées à l'eau de mer, présentatient un module d'élasticité particulièrement bas.

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References

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Copyright information

© RILEM 1990

Authors and Affiliations

  • Vanagis Ramachandran
    • 1
  • Rolff Feldman
    • 1
  • James J. Beaudoin
    • 1
  1. 1.Materials Section, Institute for Research in ConstructionNational Research Council CanadaOttawaCanada

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