3D concrete printing of eco-friendly geopolymer containing brick waste

Article

Pasupathy, Kirubajiny, Ramakrishnan, Sayanthan and Sanjayan, Jay. 2023. "3D concrete printing of eco-friendly geopolymer containing brick waste." Cement and Concrete Composites. 138. https://doi.org/10.1016/j.cemconcomp.2023.104943
Article Title

3D concrete printing of eco-friendly geopolymer containing brick waste

ERA Journal ID21082
Article CategoryArticle
AuthorsPasupathy, Kirubajiny, Ramakrishnan, Sayanthan and Sanjayan, Jay
Journal TitleCement and Concrete Composites
Journal Citation138
Article Number104943
Number of Pages11
Year2023
PublisherElsevier
Place of PublicationUnited Kingdom
ISSN0958-9465
1873-393X
Digital Object Identifier (DOI)https://doi.org/10.1016/j.cemconcomp.2023.104943
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0958946523000173
Abstract

This study investigates alkali-activated brick waste powder as the binder for developing 3D printable geopolymer mixes. The brick waste was used as a partial replacement to fly ash in geopolymer binders. The effect of brick waste content on the fresh properties of printable mixes, such as flow, setting time and rheological properties were investigated. Besides, the hardened properties of 3D printed brick waste geopolymer were evaluated with the varying brick waste content in the mix. The test results demonstrated that the fresh properties of 3D printable mixes were improved with the brick waste content in the mix. Compared to the control mix, the mixes containing brick waste displayed high yield strength and apparent viscosity at an early age. On the contrary, the hardened properties of compressive strength and interlayer strength of 3D printed concrete specimens were decreased with the high brick waste content; however, the incorporation of brick waste for up to 10% has enhanced the hardened properties. Finally, the sustainability assessment of brick waste geopolymer studied with embodied energy and carbon emission calculations reveals the proposed geopolymer concrete could reduce the embodied energy and carbon emission by up to 60–80%, compared to OPC concrete.

KeywordsGeopolymer concrete ; Digital construction ; Brick waste ; Rheological properties ; Porosity; Compressive strength
ANZSRC Field of Research 2020400505. Construction materials
401401. Additive manufacturing
401602. Composite and hybrid materials
Byline AffiliationsSwinburne University of Technology
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