The Ring Method of Measuring Restrained Shrinkage in Mortar and Concrete

    Volume 1, Issue 1 (January 1979)

    ISSN: 0149-6123

    CODEN: CCAOAD

    Page Count: 8


    Bandyopadhyay, AK
    Design engineer, Tata Engineering and Locomotive Co. Ltd., Bihar,

    Stavrides, H
    Lecturer, Higher Technical Institute, Nicosia,

    Swamy, RN
    Reader, University of Sheffield,

    Abstract

    This paper describes an improved steel-ring test method for determining tensile stresses induced by the restrained shrinkage of either mortar or concrete. The method permits measurement of shrinkage stresses at ages as early as five hours after casting. The specimens used were 102-mm (4-in.) thick rings with an outer diameter of 660 mm (26 in.). Graphic data are presented to validate the efficacy of the method. Restrained shrinkage measurements are given for plain mortar, mortar incorporating alkali-resistant glass fibers, and plain concrete (both normal weight, incorporating gravel aggregate, and lightweight, incorporating expanded slate aggregate). Also shown are the effects of heat of hydration associated with special hydraulic cements (aluminous and ultrafine Type I portland).


    Paper ID: CCA10168J

    DOI: 10.1520/CCA10168J

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    Author
    Title The Ring Method of Measuring Restrained Shrinkage in Mortar and Concrete
    Symposium , 0000-00-00
    Committee C01