Strength Development and Thermogravimetric Investigation of High-Volume Fly Ash Binders.

Autor: Zhou Z; Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia. zhiyuan.zhou@unimelb.edu.au., Sofi M; Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia. massoud@unimelb.edu.au., Lumantarna E; Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia. elu@unimelb.edu.au., San Nicolas R; Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia. rackel.san@unimelb.edu.au., Hadi Kusuma G; David Reid Homes, Glen Waverley, VIC 3150, Australia. gideonkusuma@drhme.com.au., Mendis P; Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia. pamendis@unimelb.edu.au.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2019 Oct 14; Vol. 12 (20). Date of Electronic Publication: 2019 Oct 14.
DOI: 10.3390/ma12203344
Abstrakt: To address sustainability issues by facilitating the use of high-volume fly ash (HVFA) concrete in industry, this paper investigates the early age hydration properties of HVFA binders in concrete and the correlation between hydration properties and compressive strengths of the cement pastes. A new method of calculating the chemically bound water of HVFA binders was used and validated. Fly ash (FA) types used in this study were sourced from Indonesia and Australia for comparison. The water to binder (w/b) ratio was 0.4 and FA replacement levels were 40%, 50% and 60% by weight. Isothermal calorimetry tests were conducted to study the heat of hydration which was further converted to the adiabatic temperature rise. Thermo-gravimetric analysis (TGA) was employed to explore the chemically bound water (W B ) of the binders. The results showed that Australian FA pastes had higher heat of hydration, adiabatic temperature rise, W B and compressive strength compared to Indonesian FA pastes. The new method of calculating chemically bound water can be successfully applied to HVFA binders. Linear correlation could be found between the W B and compressive strength.
Databáze: MEDLINE
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