STP691: Effect of Mineral Fillers on Sulfate Resistance of Portland Cement Mortars

    Soroka, I
    Professor and research assistant, Building Research Station, Faculty of Civil Engineering, Technion-Israel Institute of Technology, Haifa,

    Setter, N
    Professor and research assistant, Building Research Station, Faculty of Civil Engineering, Technion-Israel Institute of Technology, Haifa,

    Pages: 10    Published: Jan 1980


    Abstract

    Sulfate-resisting properties of cement mortars containing ground lime-stone, dolomite, and basalt were studied from the expansion and deterioration of 25.4 by 25.4 by 158.8 mm prisms immersed in 5 percent (Na2SO4) solution for up to 11 months. Fillers content varied from 10 to 40 percent of the cement by weight, and their fineness (Blaine) from 1150 to 11 000 cm2/g. The rate of expansion of the specimens containing the limestone filler was slower than that of the specimens containing the other fillers, with onset of cracking occurring in the former after 10 to 12 weeks as against 6 weeks in the latter, including the reference specimens. After 5 months, the beneficial effect of the limestone filler was only slightly evident. It seems that the addition of limestone filler improves sulfate-resisting properties of cement mortars to a limited extent only.

    Keywords:

    mineral fillers (limestone, dolomite, basalt), portland cement mortars, sulfate expansion, durability, building materials


    Paper ID: STP36069S

    Committee/Subcommittee: E06.55

    DOI: 10.1520/STP36069S


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