Volume 2, Issue 1 (January 2005)

    ASTM C 88 Test on Soundness of Aggregate Using Sodium Sulfate or Magnesium Sulfate: A Study of the Mechanisms of Damage

    (Received 22 December 2003; accepted 23 September 2004)

    Published Online: 2005

    CODEN: JAIOAD

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    Abstract

    In this study, the mechanisms of damage to aggregate particles by sodium sulfate and magnesium sulfate solutions were investigated. By using glass and aluminum containers to represent aggregate pore space and confining walls, test results showed that during soaking cycles crystal growth occurred that applied some bearing pressure on the container. This bearing pressure, however, was secondary to more damaging pressure that occurred during the oven drying cycles. During soaking cycles, mirabilite (Na2·SO4 10H2O) applied bearing pressures up to about 0.6 MPa. During oven drying cycles, thenardite applied bearing pressures up to about 2.0 MPa. Magnesium sulfate salts produced bearing pressures about the same magnitude as that of the sodium sulfate salts.


    Author Information:

    Haynes, H
    Principal, Haynes & Associates, Oakland, CA


    Stock #: JAI12517

    ISSN: 1546-962X

    DOI: 10.1520/JAI12517

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    Author
    Title ASTM C 88 Test on Soundness of Aggregate Using Sodium Sulfate or Magnesium Sulfate: A Study of the Mechanisms of Damage
    Symposium , 0000-00-00
    Committee D04