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Processed bottom ash for replacing fine aggregate in making high-volume fly ash concrete

Antoni, and SULISTIO, ALDI VINCENT and WAHJUDI, SAMUEL and Hardjito, Djwantoro (2017) Processed bottom ash for replacing fine aggregate in making high-volume fly ash concrete. [UNSPECIFIED]

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    Abstract

    Bottom ash is a coal plant by-product that is abundant and underutilized. There is the potential use of bottom ash as a fine aggregate replacement in concrete mixtures; however, the problems of water absorption and uniformity of quality of the material need to be overcome first. In this study, bottom ash was treated by sieve separation and pounding to smaller particle size for use as a sand substitute. The physical and chemical characteristics of bottom ash were tested after treatment including water absorption, sieve analysis, and fineness modulus. High volume fly ash (HVFA) mortar specimens were made and the compressive strength and flowability test using bottom ash after treatment are compared with that of the sand specimen. Low water to cementitious ratio was used to ensure higher strength from the cementitious paste and superplasticizer demand was determined for each treatment. The result showed that bottom ash can be used as fine aggregate replacement material. Sieve separation of the bottom ash could produce 75% of the compressive strength compared with the control sand specimen, whereas pounded bottom ash could have up to 96% of the compressive strength of the control specimen. A 28-day compressive strength of 45 MPa was achievable with 100% replacement of fine aggregate with bottom ash.

    Item Type: UNSPECIFIED
    Additional Information: Dari conference, Sudah terbit
    Uncontrolled Keywords: Concrete, Bottom ash, Fly ash, HVFA, Green Concrete, Fine aggregate
    Subjects: T Technology > TA Engineering (General). Civil engineering (General)
    Divisions: Faculty of Civil Engineering and Planning > Civil Engineering Department
    Depositing User: Admin
    Date Deposited: 08 Jan 2018 19:27
    Last Modified: 25 Apr 2018 14:46
    URI: http://repository.petra.ac.id/id/eprint/17727

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