Volume 3, Issue 1

    Monitoring Setting of Geopolymers

    (Received 27 August 2013; accepted 2 January 2014)

    Published Online: 2014

    CODEN: ACEMOAD

      Format Pages Price  
    PDF 17 $25   ADD TO CART


    Abstract

    The setting behavior of geopolymer pastes as a function of time was studied using two methods: penetration resistance and ultrasonic shear wave reflection. Several starting materials were included—metakaolin, Class C and Class F fly ashes, and slag—and chemical parameters known to affect set were varied. The geopolymers showed a wide range of set times compared to a reference Portland cement paste: some were much more rapid, some were similar, and some were much slower. Although most geopolymers formed gels that were both solid and had measurable strength, some, initially, formed a soft gel that had no measurable strength. Therefore, to fully characterize setting behavior, it is necessary to use both types of tests. It was seen that setting behavior was sensitive to chemical parameters, with setting delayed somewhat with increasing silica/alumina and increasing water/alkali, and accelerated substantially with calcium hydroxide substitution.


    Author Information:

    Suraneni, Prannoy
    Research Assistant, Institute for Building Materials, Dept. of Civil, Environmental and Geomatic Engineering, Zürich, ETH

    Puligilla, Sravanthi
    Graduate Research Assistant, Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana, IL

    Kim, Eric H.
    Quality Engineer, ExxonMobil Development Company, Houston, TX

    Chen, Xu
    Graduate Research Assistant, Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana, IL

    Struble, Leslie J.
    Professor, Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana, IL

    Mondal, Paramita
    Assistant Professor, Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana, IL


    Stock #: ACEM20130100

    ISSN: 2165-3984

    DOI: 10.1520/ACEM20130100

    ASTM International is a member of CrossRef.

    Author
    Title Monitoring Setting of Geopolymers
    Symposium , 0000-00-00
    Committee C01