STP778

    An Autoclave Expansion Test Method for Type N Hydrated Lime Intended for Use in Masonry Mortar

    Published: Jan 1982


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    Abstract

    This paper reviews the attempts of ASTM Committee C-7 on Lime to develop an acceptable method of assessing the expansive potential of unhydrated MgO in Type N hydrated lime in masonry mortar. Autoclave expansion tests on bars of mortar containing hydrated lime, portland cement, and aggregate are rejected because of variable results. A new test method has been developed in which autoclave expansion values for pressed tablets are more consistent and are considered more realistic in terms of field performance.

    Keywords:

    hydrated lime (Type N), dolomitic, autoclave expansion, unsoundness, tablets (compacts), masonry mortar, cementitious materials, measurement, acceptability


    Author Information:

    Davison, JI
    Research Officer, Division of Building Research, National Research Council of Canada, Halifax, Nova Scotia


    Paper ID: STP30110S

    Committee/Subcommittee: C07.10

    DOI: 10.1520/STP30110S


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