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An Investigation into Durability Aspects of Geopolymer Concretes Based Fully on Construction and Demolition Waste
Ozcelikci, E. Yildirim, Gurkan Alhawat, Musab M. Sahmaran, M.
Ozcelikci, E.
Yildirim, Gurkan
Alhawat, Musab M.
Sahmaran, M.
Publication Date
2023-06
End of Embargo
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Rights
© 2023 Springer. Reproduced in accordance with the publisher's self-archiving policy. This version of the contribution has been accepted for publication, after peer review (when applicable) but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/978-3-031-32519-9_36. Use of this Accepted Version is subject to the publisher’s Accepted Manuscript terms of use https://www.springernature.com/gp/open-research/policies/accepted-manuscript-terms.
Peer-Reviewed
Yes
Open Access status
openAccess
Accepted for publication
2023-03-24
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Abstract
The focus of the construction industry has shifted towards the development of al-ternative, eco-friendly and green construction materials due to the energy-inefficient and carbon-intensive nature of Portland cement (PC) production and aggregate quarrying. Meanwhile, increased number of repetitive re-pair/renovation/maintenance activities and demolition operations for the end-of-life buildings generate significant amounts of construction and demolition waste (CDW). For the purposes of sustainability and upcycling wastes into high-value-added materials with improved greenness, components from CDW streams can be used in producing geopolymer concretes without using PC and natural aggre-gates, given the rich aluminosiliceous nature of CDW components. The focus of current work is therefore on the analysis of durability of aspects (i.e., drying shrinkage and resistance against sulfate attack, cyclic freezing-thawing, and chlo-ride penetration) of geopolymer concretes made entirely of CDW. Different types of bricks, tile, concrete, and glass were used in mixed form as precursors for ge-opolymerization while different-size grains of waste concrete were used as recy-cled aggregates. As alkali activators, sodium hydroxide, calcium hydroxide and sodium silicate were used. In a companion mixture, CDW-based precursors were replaced with slag and class-F fly ash. Results showed that sulfate and cyclic freeze-thaw exposure did not cause any noticeable weight and compressive strength loss in CDW-based geopolymer concretes, while chloride penetration was found comparable to PC-based concrete. While drying shrinkage was found high in entirely CDW-based geopolymer concrete and resulted in surface mi-crocracks, it was possible to lower the drying shrinkage substantially via substi-tution of CDW-based precursors with fly ash and slag.
Version
Accepted manuscript
Citation
Ozcelikci E, Yildirim G, Alhawat M et al (2023) An Investigation into Durability Aspects of Geopolymer Concretes Based Fully on Construction and Demolition Waste. In: Ilki A, Cavunt D and Cavunt YS (Eds.) Building for the Future: Durable, Sustainable,
Resilient. fib Symposium 2023. Lecture Notes in Civil Engineering. 349: 377-386. Springer.
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Type
Conference paper
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Notes
This paper is from the fib Symposium 2023, Building for the future: Durable, Sustainable, Resilient. 5-7 Jun, Istanbul, Turkey.