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Effects of Chemical Parameters on the Fresh State Properties of CDW-Based Geopolymer Systems

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Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 (CSCE 2021)

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 248))

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Abstract

The fresh properties of construction and demolition wastes (CDW)-based geopolymer pastes depend on various factors such as the contents of aluminosilicates in precursors, the combination of precursor powders and the contents of alkaline solutions and water. In order to quantify the effects of the aforementioned factors on the fresh properties of CDW-based geopolymer compositions, an algorithmic mix design method was employed based on precursors contents, liquid/solid (L/S) and synthesis chemical oxide values. This study presents the influence of SiO2/Al2O3 (Si/Al) and Na2O/SiO2 (Na/Si) molar ratios and precursors contents on the flowability and setting behavior of mono and binary geopolymer systems prepared with red clay brick waste (RCBW), ceramic tile waste (CTW) and concrete waste (CW). Binary systems were adjusted to include precursors contents between 20 and 80%. The results confirmed a high correlation between the oxide ratios and the followability and setting times of geopolymers, though the same L/S ratio was used for all compositions. Overall, increasing Si/Al and Na/Si ratios resulted in increased flowability. In addition, increased ratio of Si/Al resulted in increased setting times; while increased Na/Si caused the setting times to reduce. It was determined that Si/Al was more influential than Na/Si on the flowability of geopolymer pastes. However, the effect of Na/Si was more dominant on setting times compared to Si/Al ratio.

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Authors and Affiliations

  1. Department of Civil Engineering, Ryerson University, Toronto, ON, M5B 2K3, Canada

    O. Mahmoodi, H. Siad & M. Lachemi

  2. Department of Civil Engineering, Hacettepe University, Ankara, Turkey

    M. Sahmaran

Authors
  1. O. Mahmoodi
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  2. H. Siad
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  3. M. Lachemi
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  4. M. Sahmaran
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Corresponding author

Correspondence to O. Mahmoodi .

Editor information

Editors and Affiliations

  1. 200 UNIVERSITY AVE W, University of Waterloo, Waterloo, ON, Canada

    Scott Walbridge

  2. Environmental Engineering, Building, Concordia University, Civil, Montreal, QC, Canada

    Mazdak Nik-Bakht

  3. University of Regina, REGINA, SK, Canada

    Kelvin Tsun Wai Ng

  4. Matrix Solutions Calgary, CALGARY, AB, Canada

    Manas Shome

  5. OKANAGAN CAMPUS, University of British Columbia, KELOWNA, BC, Canada

    M. Shahria Alam

  6. THE UNIVERSITY OF WESTERN ONTARIO, ONTARIO, ON, Canada

    Ashraf el Damatty

  7. OKANAGAN CAMPUS, University of British Columbia, KELOWNA, BC, Canada

    Gordon Lovegrove

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© 2023 Canadian Society for Civil Engineering

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Mahmoodi, O., Siad, H., Lachemi, M., Sahmaran, M. (2023). Effects of Chemical Parameters on the Fresh State Properties of CDW-Based Geopolymer Systems. In: Walbridge, S., et al. Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 . CSCE 2021. Lecture Notes in Civil Engineering, vol 248. Springer, Singapore. https://doi.org/10.1007/978-981-19-1004-3_8

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  • DOI: https://doi.org/10.1007/978-981-19-1004-3_8

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-19-1003-6

  • Online ISBN: 978-981-19-1004-3

  • eBook Packages: EngineeringEngineering (R0)

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