Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/112210
Title: Leveraging incinerator bottom ash for mitigating early age shrinkage in 3D printed engineered cementitious composites
Authors: Yu, J 
Xu, F 
Zhang, H 
Ye, J
Yu, J
Dai, JG
Weng, Y 
Issue Date: Mar-2025
Source: Cement and concrete composites, Mar. 2025, v. 157, 105933
Abstract: This study investigates the use of incinerator bottom ash (IBA) as a supplementary cementitious material to mitigate early age shrinkage in 3D printed engineered cementitious composites (3DP-ECC). IBA was processed through milling and thermal treatment before incorporation into 3DP-ECC. The fresh and hardened properties, hydration kinetics and products, early age shrinkage, and microstructural characteristics of 3DP-ECC with IBA were evaluated. Results indicate that pre-treated IBA reduces autogenous shrinkage and plastic shrinkage by 56 % and 30 %, respectively. The substitution of IBA increases the volume fraction of macropores (>1000 nm) of 3DP-ECC at 3 days and 7 days by approximately 300 % and 500 %, respectively, alleviating early age shrinkage. Sustainability analysis reveals that the incorporation of IBA can reduce the normalized embodied energy and carbon footprint of 3DP-ECC by over 17 %. These findings provide a promising approach to utilizing waste materials in mitigating early age shrinkage in 3DP-ECC towards sustainable digital construction.
Keywords: 3D concrete printing
Early age shrinkage
Engineered cementitious composites
Incinerator bottom ash
Sustainability
Publisher: Elsevier Ltd
Journal: Cement and concrete composites 
ISSN: 0958-9465
EISSN: 1873-393X
DOI: 10.1016/j.cemconcomp.2025.105933
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