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    Effect of nano silica on durability properties of concretes containing recycled coarse aggregates

    6321.pdf (227.7Kb)
    Access Status
    Open access
    Authors
    Shaikh, Faiz
    Odoh, H.
    Date
    2014
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Shaikh, F. and Odoh, H. 2014. Effect of nano silica on durability properties of concretes containing recycled coarse aggregates, in Mangangka, I. (ed), International Conference on Environmentally Friendly Civil Engineering Construction and Materials (EFCECM), Nov 13-14 2014. Manado, Indonesia: EFCECM.
    Source Conference
    International Conference on Environmentally Friendly Civil Engineering Construction and Materials
    DOI
    10.1680/coma.14.00009
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/6341
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents the effect of nano silica (NS) on durability properties of concretes containing recycled coarse aggregates (RCA). The RCA is sourced from local construction and demolition (C&D) wastes. Seven series of concretes are considered in this study. The first series is the control series which contains all natural aggregates and no NS. In the second and third series, 25% and 50% (by wt.) natural coarse aggregate are replaced by RCA, respectively. The effects of NS on concretes containing RCA are evaluated in rest of the series. In fourth and fifth series, 1% and 2% (by wt.) NS are added in concrete containing 25% RCA, respectively. The sixth and seventh series are similar to fourth and fifth series in every aspect except the RCA content of 50%. Durability properties, such as sorptivity, volume of permeable voids and chloride penetration of above concretes are evaluated after 7 and 28 days of water curing. Results show that the addition of NS significantly improves the above durability properties of concretes containing 25% and 50% RCA.

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