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Statistical Analysis of the Effect of Mineral Admixtures on the Strength of the Interfacial Transition Zone

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Interface Science

Abstract

Microscopic evidence indicates that the thickness of the interfacial transition zone (ITZ) between the aggregate and the cement paste is modified when mineral admixtures partially replace portland cement. Unfortunately, there is limited information on the significance of these microscopic modifications to the mechanical properties of the ITZ. This research reports experimental results on the shear and tensile strength of the ITZ as affected by the addition of the following mineral admixtures: silica fume, fly ash, and natural pozzolan. Statistical analysis was used to identify the significant parameters affecting the tensile and shear strength of the ITZ. Experimental results indicate that not only does the incorporation of silica fume and fly ash increase the strength of the ITZ, these mineral admixtures have a greater influence on the strength increase of the ITZ than in the strength increase of the cement paste.

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Authors and Affiliations

  1. Department of Civil Engineering, Universidade Estadual de Campinas, Sao Paulo, Brazil

    V.A. Paulon

  2. Department of Civil Engineering, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    D. Dal Molin

  3. Department of Civil and Environmental Engineering, University of California at Berkeley, CA, USA

    P.J.M. Monteiro

Authors
  1. V.A. Paulon
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  2. D. Dal Molin
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  3. P.J.M. Monteiro
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Paulon, V., Dal Molin, D. & Monteiro, P. Statistical Analysis of the Effect of Mineral Admixtures on the Strength of the Interfacial Transition Zone. Interface Science 12, 399–410 (2004). https://doi.org/10.1023/B:INTS.0000042338.54460.02

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  • DOI: https://doi.org/10.1023/B:INTS.0000042338.54460.02

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