High-volume natural volcanic pozzolan and limestone powder as partial replacements for portland cement in self-compacting and sustainable concrete

Kemal Celik, M. D. Jackson, M. Mancio, C. Meral, A. H. Emwas, P. K. Mehta, P. J.M. Monteiro

    Research output: Contribution to journalArticle

    Abstract

    A laboratory study demonstrates that high volume, 45% by mass replacement of portland cement (OPC) with 30% finely-ground basaltic ash from Saudi Arabia (NP) and 15% limestone powder (LS) produces concrete with good workability, high 28-day compressive strength (39 MPa), excellent one year strength (57 MPa), and very high resistance to chloride penetration. Conventional OPC is produced by intergrinding 95% portland clinker and 5% gypsum, and its clinker factor (CF) thus equals 0.95. With 30% NP and 15% LS portland clinker replacement, the CF of the blended ternary PC equals 0.52 so that 48% CO2 emissions could be avoided, while enhancing strength development and durability in the resulting self-compacting concrete (SCC). Petrographic and scanning electron microscopy (SEM) investigations of the crushed NP and finely-ground NP in the concretes provide new insights into the heterogeneous fine-scale cementitious hydration products associated with basaltic ash-portland cement reactions.

    Original languageEnglish (US)
    Pages (from-to)136-147
    Number of pages12
    JournalCement and Concrete Composites
    Volume45
    DOIs
    StatePublished - Jan 1 2014

    Fingerprint

    Pozzolan
    Ashes
    Calcium Carbonate
    Portland cement
    Limestone
    Powders
    Concretes
    Self compacting concrete
    Calcium Sulfate
    Gypsum
    Hydration
    Compressive strength
    Chlorides
    Durability
    Scanning electron microscopy

    Keywords

    • Basaltic ash pozzolan
    • Chloride migration
    • Compressive strength
    • Limestone filler
    • Petrographic analysis
    • Self-consolidating concrete

    ASJC Scopus subject areas

    • Building and Construction
    • Materials Science(all)

    Cite this

    High-volume natural volcanic pozzolan and limestone powder as partial replacements for portland cement in self-compacting and sustainable concrete. / Celik, Kemal; Jackson, M. D.; Mancio, M.; Meral, C.; Emwas, A. H.; Mehta, P. K.; Monteiro, P. J.M.

    In: Cement and Concrete Composites, Vol. 45, 01.01.2014, p. 136-147.

    Research output: Contribution to journalArticle

    Celik, Kemal ; Jackson, M. D. ; Mancio, M. ; Meral, C. ; Emwas, A. H. ; Mehta, P. K. ; Monteiro, P. J.M. / High-volume natural volcanic pozzolan and limestone powder as partial replacements for portland cement in self-compacting and sustainable concrete. In: Cement and Concrete Composites. 2014 ; Vol. 45. pp. 136-147.
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