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The impact of using fly ash, silica fume and calcium carbonate on the workability and compressive strength of mortar

Antoni, and CHANDRA, LUCKY and Hardjito, Djwantoro (2015) The impact of using fly ash, silica fume and calcium carbonate on the workability and compressive strength of mortar. Procedia Engineering, 125 (125). p. 779. ISSN 1877-7058

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    Abstract

    Pozzolanic materials and calcium carbonate can be used to partially replace the use of cement in making mortar or concrete without altering the rheological properties of the fresh mixture. This study focuses on the use of fly ash in the range of 0-30%, silica fume 0-10% and calcium carbonate 0-15% of the cement content, by mass. The workability of the fresh mortar was evaluated and the compressive strength of hardened mortar were measured at the ages of 7, 14, 28 and 56 days. Test results show that increasing partial replacement of cement with fly ash increased the workability and compressive strength of mortar. The use of silica fume reduces the workability of the fresh mortar, and thus requires the addition of superplasticizer to improve the workability. Finer particle size of calcium carbonate also increase workability. The addition of calcium carbonate resulted in higher early strength, whereas the Strength Activity Index (SAI) values slightly reduced with age.

    Item Type: Article
    Additional Information: Jurnal masuk di Procedia Engineering, bukan ke MSF
    Uncontrolled Keywords: fly ash; silica fume; calcium carbonate; compressive strength; workability;
    Subjects: T Technology > TA Engineering (General). Civil engineering (General)
    T Technology > TH Building construction
    Divisions: Faculty of Civil Engineering and Planning > Civil Engineering Department
    Depositing User: Admin
    Date Deposited: 16 Dec 2015 05:39
    Last Modified: 06 Oct 2016 15:45
    URI: http://repository.petra.ac.id/id/eprint/17740

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