Alkali activation of PFA: effect on strength development

M.R. Jones, L.J. Csetenyi, E. Csetenyi, R.K. Dhir

    Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

    Abstract

    The compressive strength development of mortars with 30%, 50% and 100% by mass replacement of Portland cement by pulverised fuel ash, activated by alkalis was studied. The considered activators were based on NaOH, Ca(OH) 2, and waterglass (2:1 SiO 2:Na 2O) in various concentrations. Two different temperature curing regimes, i.e. 20°C and 60°C water storage after moulding at 24 hours, were tested. 40mm cube strength was measured at 1, 3, 7, 28, and 91 days. The results show lower strength development rates than PC control and indeed literature references report paste strength development cured at temperatures typically between 65 and 85°C. The results underline the difficulty of alkali activating PFA at practical temperatures that could be used in precast concrete production.

    Original languageEnglish
    Title of host publicationRole of cement science in sustainable development
    Subtitle of host publicationproceedings of the International Symposium dedicated to Professor Fred Glasser, University of Aberdeen, Scotland held on 3-4 September 2003 at the University of Dundee, Scotland, UK
    EditorsRavindra K. Dhir, Moray D. Newlands, Laszlo J. Csetenyi
    Place of PublicationLondon
    PublisherThomas Telford
    Pages319-324
    Number of pages6
    ISBN (Print)0727732463, 9780727732477
    Publication statusPublished - 1 Jan 2003
    EventInternational Symposium Dedicated to Professor Fred Glasser, University of Aberdeen, Scotland - Dundee, United Kingdom
    Duration: 3 Sep 20034 Sep 2003

    Conference

    ConferenceInternational Symposium Dedicated to Professor Fred Glasser, University of Aberdeen, Scotland
    CountryUnited Kingdom
    CityDundee
    Period3/09/034/09/03
    OtherSeries of three international symposia to promote the contributions that concrete ... under the umbrella title of Celebrating Concrete, People and Practice"

    Fingerprint

    Chemical activation
    Ashes
    Pulverized fuel
    Precast concrete
    Portland cement
    Mortar
    Molding
    Temperature
    Compressive strength
    Curing
    Water

    Cite this

    Jones, M. R., Csetenyi, L. J., Csetenyi, E., & Dhir, R. K. (2003). Alkali activation of PFA: effect on strength development. In R. K. Dhir, M. D. Newlands, & L. J. Csetenyi (Eds.), Role of cement science in sustainable development: proceedings of the International Symposium dedicated to Professor Fred Glasser, University of Aberdeen, Scotland held on 3-4 September 2003 at the University of Dundee, Scotland, UK (pp. 319-324). London: Thomas Telford.
    Jones, M.R. ; Csetenyi, L.J. ; Csetenyi, E. ; Dhir, R.K. / Alkali activation of PFA : effect on strength development. Role of cement science in sustainable development: proceedings of the International Symposium dedicated to Professor Fred Glasser, University of Aberdeen, Scotland held on 3-4 September 2003 at the University of Dundee, Scotland, UK. editor / Ravindra K. Dhir ; Moray D. Newlands ; Laszlo J. Csetenyi. London : Thomas Telford, 2003. pp. 319-324
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    title = "Alkali activation of PFA: effect on strength development",
    abstract = "The compressive strength development of mortars with 30{\%}, 50{\%} and 100{\%} by mass replacement of Portland cement by pulverised fuel ash, activated by alkalis was studied. The considered activators were based on NaOH, Ca(OH) 2, and waterglass (2:1 SiO 2:Na 2O) in various concentrations. Two different temperature curing regimes, i.e. 20°C and 60°C water storage after moulding at 24 hours, were tested. 40mm cube strength was measured at 1, 3, 7, 28, and 91 days. The results show lower strength development rates than PC control and indeed literature references report paste strength development cured at temperatures typically between 65 and 85°C. The results underline the difficulty of alkali activating PFA at practical temperatures that could be used in precast concrete production.",
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    Jones, MR, Csetenyi, LJ, Csetenyi, E & Dhir, RK 2003, Alkali activation of PFA: effect on strength development. in RK Dhir, MD Newlands & LJ Csetenyi (eds), Role of cement science in sustainable development: proceedings of the International Symposium dedicated to Professor Fred Glasser, University of Aberdeen, Scotland held on 3-4 September 2003 at the University of Dundee, Scotland, UK. Thomas Telford, London, pp. 319-324, International Symposium Dedicated to Professor Fred Glasser, University of Aberdeen, Scotland , Dundee, United Kingdom, 3/09/03.

    Alkali activation of PFA : effect on strength development. / Jones, M.R.; Csetenyi, L.J.; Csetenyi, E.; Dhir, R.K.

    Role of cement science in sustainable development: proceedings of the International Symposium dedicated to Professor Fred Glasser, University of Aberdeen, Scotland held on 3-4 September 2003 at the University of Dundee, Scotland, UK. ed. / Ravindra K. Dhir; Moray D. Newlands; Laszlo J. Csetenyi. London : Thomas Telford, 2003. p. 319-324.

    Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

    TY - CHAP

    T1 - Alkali activation of PFA

    T2 - effect on strength development

    AU - Jones, M.R.

    AU - Csetenyi, L.J.

    AU - Csetenyi, E.

    AU - Dhir, R.K.

    PY - 2003/1/1

    Y1 - 2003/1/1

    N2 - The compressive strength development of mortars with 30%, 50% and 100% by mass replacement of Portland cement by pulverised fuel ash, activated by alkalis was studied. The considered activators were based on NaOH, Ca(OH) 2, and waterglass (2:1 SiO 2:Na 2O) in various concentrations. Two different temperature curing regimes, i.e. 20°C and 60°C water storage after moulding at 24 hours, were tested. 40mm cube strength was measured at 1, 3, 7, 28, and 91 days. The results show lower strength development rates than PC control and indeed literature references report paste strength development cured at temperatures typically between 65 and 85°C. The results underline the difficulty of alkali activating PFA at practical temperatures that could be used in precast concrete production.

    AB - The compressive strength development of mortars with 30%, 50% and 100% by mass replacement of Portland cement by pulverised fuel ash, activated by alkalis was studied. The considered activators were based on NaOH, Ca(OH) 2, and waterglass (2:1 SiO 2:Na 2O) in various concentrations. Two different temperature curing regimes, i.e. 20°C and 60°C water storage after moulding at 24 hours, were tested. 40mm cube strength was measured at 1, 3, 7, 28, and 91 days. The results show lower strength development rates than PC control and indeed literature references report paste strength development cured at temperatures typically between 65 and 85°C. The results underline the difficulty of alkali activating PFA at practical temperatures that could be used in precast concrete production.

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    M3 - Other chapter contribution

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    SN - 0727732463

    SN - 9780727732477

    SP - 319

    EP - 324

    BT - Role of cement science in sustainable development

    A2 - Dhir, Ravindra K.

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    Jones MR, Csetenyi LJ, Csetenyi E, Dhir RK. Alkali activation of PFA: effect on strength development. In Dhir RK, Newlands MD, Csetenyi LJ, editors, Role of cement science in sustainable development: proceedings of the International Symposium dedicated to Professor Fred Glasser, University of Aberdeen, Scotland held on 3-4 September 2003 at the University of Dundee, Scotland, UK. London: Thomas Telford. 2003. p. 319-324