Effect of volcanic ash pozzolan or limestone replacement on hydration of Portland cement

Kemal Celik, Rotana Hay, Craig W. Hargis, Juhyuk Moon

    Research output: Contribution to journalArticle

    Abstract

    The replacement of Portland cement (PC) with either supplementary cementitious material (SCM) or fillers, such as natural pozzolans (NP) or limestone powder (LP) respectively, is known to affect the chemical properties of concrete, thus influencing its fresh and hardened properties. This study investigated the effects of volcanic ash NP or LP on setting time, normal consistency, hydration, and strength properties of cement paste and mortar while following the chemical changes that were a direct result of the substitution. While both materials were found to increase water demand, NP at 30% and 50% replacement levels increased setting time while LP at 15% replacement level insignificantly influenced the property. At a proportion lower than their replacement levels, both materials reduced the ultimate compressive strength of mortar. Thermal, chemical and microstructural analyses confirmed the participatory roles of NP and LP in controlling reaction kinetics and forming new hydration products.

    Original languageEnglish (US)
    Pages (from-to)803-812
    Number of pages10
    JournalConstruction and Building Materials
    Volume197
    DOIs
    StatePublished - Feb 10 2019

    Fingerprint

    Ashes
    Volcanic Eruptions
    Pozzolan
    Calcium Carbonate
    Portland cement
    Limestone
    Hydration
    Powders
    Mortar
    Ointments
    Reaction kinetics
    Chemical properties
    Compressive strength
    Fillers
    Cements
    Substitution reactions
    Concretes
    Water

    Keywords

    • High volume volcanic ash pozzolan
    • Limestone filler
    • Microscopy
    • Natural pozzolan
    • Strength

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • Materials Science(all)

    Cite this

    Effect of volcanic ash pozzolan or limestone replacement on hydration of Portland cement. / Celik, Kemal; Hay, Rotana; Hargis, Craig W.; Moon, Juhyuk.

    In: Construction and Building Materials, Vol. 197, 10.02.2019, p. 803-812.

    Research output: Contribution to journalArticle

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