Hydration and Strength Evolution of Ternary-Blend High-Volume Fly Ash Concretes
C Gunasekera, Z Zhou, M Sofi, DW Law, S Setunge, P Mendis
ACI Materials Journal | American Concrete Institute | Published : 2019
The increase of carbon emissions due to the annual growth of portland cement (PC) production has promoted research into the development of sustainable green concrete using a range of readily available industrial waste materials. The present study is focused on developing two high-volume fly ash (HVFA) concretes with cement replacement levels of 65% (HVFA-65) and 80% (HVFA-80). The required lime for both HVFA concrete mixtures was initially determined and the optimized mixture designs identified, based on the 28-day compressive strength, by varying the low-calcium Class F fly ash-hydrated lime composition. The optimized concrete mixtures achieved a compressive strength of 53 and 40 MPa (7.69 ..View full abstract
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Awarded by Australian Research Council's Discovery Early Career Researcher Grant
The authors wish to acknowledge Boral Limited, Flyash Australia Pty Ltd, and Independent Cement & Lime Pty Ltd for the supply of materials. The X-ray facility and Microscopy & Microanalysis facility provided by RMIT University and the calorimetry tests conducted in Melbourne University are also acknowledged. This research was conducted by the Australian Research Council Industrial Transformation Research Hub for nanoscience-based construction material manufacturing (IH150100006) and funded by the Australian Government. The financial supports from the Australian Research Council's Discovery Early Career Researcher Grant (DE170100165, DE 2017 R1), Australian Postgraduate Award, and the University of Melbourne are also acknowledged. The authors declare that they have no conflict of interest.