Recycled ceramic brick powder utilization in fiber reinforced 3D printing concrete: An eco-friendly substitute to conventional fine aggregates

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Selina Gondwe
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Recycled ceramic brick powder utilization in fiber reinforced 3D printing concrete- An eco-friendly substitute to conventional fine aggregatesDownload

Abstract: The incorporation of recycled ceramic brick powder (RCBP) into conventional cast concrete has proofed its efficacy in substituting aggregates, improving strength, and contributing to environ mental sustainability. Concurrently, 3D printing technology is emerging as a pivotal trend in intelligent construction. This study investigates the collaborative interaction mechanisms of 3D printed RCBP concrete. Compressive and four-point bending tests along the x, y, and z-axis are conducted to evaluate its strength and anisotropy. Subsequently, the hydration products and pore structural characteristics were analysed employing Scanning Electron Microscope (SEM) and X CT experiments. Additionally, an environmental life cycle analysis is performed utilizing OpenLCA software. The results determined an optimal RCBP content of 25-wt% yields satisfactory performance in macro-mechanical properties (with maximal 65.57 MPa for compressive strength and 12.66 MPa for flexural strength) and micro-structural characterization. Specifically, the drainage consolidation effect achieved through 3D printing technology mitigates the typical decline observed in conventional RCBP concrete. However, exceeding the 25-wt% threshold leads to a noticeable decline in mechanical strength due to inhomogeneous particle gradation and excessive aggregation of RCBP particles, despite a significant reduction in porosity. Furthermore, as RCBP incorporation increases from 0-wt% to 100-wt%, four environment impact indicators including Global warming potential (GWP), Acidification Potential (AP), Ozone Depletion Potential (ODP), and Abiotic depletion potential (ADP) respectively decline by 24.86 %, 6.59 %, 0.49 %, and 0.62 %, demonstrating exceptional environmental benefits. Notably, the tremendous influence on GWP is attributed to the remarkable carbon sequestration of RCBP, aligning with national carbon neutrality goals and advancing sustainable construction practices

Author(s): Bo Huang, Yutian Ge, Xiangyu Wang b, Yufei Wang, Jianqun Wang, Chengwei Song, Jun Zhu, Chiemela Victor Amaechi and Junbo Sun

Date Published: 29 November 2024

Depositing User: Selina Gondwe

DOI: https://doi.org/10.1016/j.jobe.2024.111441

Keywords: 3D printing, Recycled ceramic brick powder, Mechanical properties, SEM, Porosity, Environmental impact

Pages: 1-15

Publication title: Journal of Building Engineering

Publisher: Elsevier

Subject(s): Engineering

Type of publication: Journal Article