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Materials and Structures

, Volume 46, Issue 7, pp 1061–1073 | Cite as

Sulfate resistance of Portland-limestone cements in combination with supplementary cementitious materials

  • Amir Mohammad Ramezanianpour
  • R. Douglas Hooton
Original Article

Abstract

In this study, the sulfate resistance of five different high-C3A Portland and Portland-limestone cements and their combinations with 30–50 % slag were examined at both 5 and 23 °C according to CSA A3004-C8 (similar to ASTM C1012). Also, XRD was used to identify the phases formed after sulfate attack. It was found that in 23 °C exposure, while 100 % cement mixes deteriorated due to conventional ettringite-based sulfate attack, partially replacing the cements with 30 or 50 % slag was effective in making the mixes highly sulfate-resistant. At 5 °C, all of the 100 % cement mortar bars expanded more than the test limits and eventually completely disintegrated due to the formation of thaumasite. Partially replacing cement with 30 % slag was only effective in controlling the deterioration for Portland cements but not Portland-limestone cements. However, all the Portland-limestone cements with 50 % slag were resistant to the thaumasite form of sulfate attack after 2 years.

Keywords

Portland-limestone cements Sulfate resistance Thaumasite Slag Sustainability 

Notes

Acknowledgments

Financial support from the Natural Sciences and Engineering Research Council of Canada, the Cement Association of Canada and Holcim Canada Inc. is gratefully appreciated.

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Copyright information

© RILEM 2012

Authors and Affiliations

  • Amir Mohammad Ramezanianpour
    • 1
  • R. Douglas Hooton
    • 1
  1. 1.Department of Civil EngineeringUniversity of TorontoTorontoCanada

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