Relationship Between Paste Volume and Cementitious Materials Content in Hardened Concrete

    Volume 3, Issue 4 (April 2006)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Page Count: 9


    Cong, DX
    Senior Petrographer, Wiss, Janney, Elstner Associates, Inc., Austin, Texas

    (Received 3 December 2004; accepted 10 November 2005)

    Abstract

    A linear regression equation is developed between the paste volumes via the point count method and total cementitious materials contents of 31 concrete samples with known mix proportions. The equation has a coefficient of determination (R2) of 0.96 and a standard deviation of 13.6 kg/m3. The equation can be used to calculate the total cementitious materials content based on the paste volume measured via point count and the water-to-cementitious-materials ratio estimated petrographically, and the result is more accurate than the traditional method currently used by many concrete petrographers. The equation is equally effective for portland cement concrete and concrete containing fly ash. In addition, the effect of fly ash, and the traditional method for estimating the cementitious materials content are further discussed.


    Paper ID: JAI13057

    DOI: 10.1520/JAI13057

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    Author
    Title Relationship Between Paste Volume and Cementitious Materials Content in Hardened Concrete
    Symposium Petrographic Techniques for Examining Hydraulic Cements and Concretes, 2004-12-10
    Committee C01C09