Variations in the Activity of Dry-Powder Water-Repellent Mortar Admixtures with Different Mortar Formulae

    Volume 4, Issue 7 (July 2007)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 26 July 2007

    Page Count: 13


    Nordmeyer, Herb
    Project & Technology Manager and Senior Lab Technician, San Antonio Lab, Headwaters Construction Materials, San Antonio, Texas

    Hall, Pam
    Project & Technology Manager and Senior Lab Technician, San Antonio Lab, Headwaters Construction Materials, San Antonio, Texas

    (Received 18 November 2005; accepted 18 June 2007)

    Abstract

    A number of water repellents are added to masonry mixes and masonry units. To be classified as a water-repellent mortar admixture, ASTM C 1384 Specification for Admixtures for Masonry Mortars, requires that the 24-h rate of water absorption needs to be reduced by at least 50 % when compared to a control mortar without the admixture. While testing two well-known water-repellent admixtures, a substantial difference in activity was noted with the mortar that was being tested. Testing was expanded to include other water-repellent admixtures and several additional mortar formulae. This paper discusses the findings of that study.


    Paper ID: JAI100444

    DOI: 10.1520/JAI100444

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    Author
    Title Variations in the Activity of Dry-Powder Water-Repellent Mortar Admixtures with Different Mortar Formulae
    Symposium Masonry, 2006-06-13
    Committee C12