Investigation of Waste Steel Fiber Usage Rate and Length Change on Some Fresh State Properties of 3D Printable Concrete Mixtures (2025-10)¶
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Journal Article - Buildings, Vol. 15, Iss. 20, No. 3731
Abstract
In this study, the effects of waste steel fiber and high volume blast furnace slag (BFS) substitution on rheological properties, thixotropic behavior and carbon emission were investigated in order to increase the sustainability of three-dimensional (3D) printable concrete (3DPC). Cement was replaced with BFS at 0%, 25%, 50% and 75% by volume, while waste steel fibers were added to the mixtures at three different lengths (5, 10, 15 mm) and volumetric ratios (0.5% and 1.0%). A total of 39 mixtures were optimized with respect to extrudability, buildability and shape stability criteria, and their rheological and thixotropic properties were characterized by a modified rheometer procedure. Results showed that 50% BFS substitution reduced dynamic yield stress and viscosity by 69% and 52%, respectively, and eliminated the need for a water-reducing admixture. 75% BFS substitution improved structural build-up (Athix) but required 6% silica fume. The fiber effect interacted with length and BFS content, with short fibers increasing rheological resistance, while the effect of long fibers decreased in mixtures with high BFS. The carbon emission assessment revealed that 75% BFS substitution provided an outstanding CO2 reduction of up to 71% compared to the control mix. These findings prove that high-volume BFS and waste fibers are an effective strategy to optimize rheological performance and environmental impact for sustainable 3D concrete printing.
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0 Citations
BibTeX
@article{akgu_sahi_mard.2025.IoWSFURaLCoSFSPo3PCM,
author = "Fatih Eren Akgümüş and Hatice Gizem Şahin and Ali Mardani",
title = "Investigation of Waste Steel Fiber Usage Rate and Length Change on Some Fresh State Properties of 3D Printable Concrete Mixtures",
doi = "10.3390/buildings15203731",
year = "2025",
journal = "Buildings",
volume = "15",
number = "20",
pages = "3731",
}
Formatted Citation
F. E. Akgümüş, H. G. Şahin and A. Mardani, “Investigation of Waste Steel Fiber Usage Rate and Length Change on Some Fresh State Properties of 3D Printable Concrete Mixtures”, Buildings, vol. 15, no. 20, p. 3731, 2025, doi: 10.3390/buildings15203731.
Akgümüş, Fatih Eren, Hatice Gizem Şahin, and Ali Mardani. “Investigation of Waste Steel Fiber Usage Rate and Length Change on Some Fresh State Properties of 3D Printable Concrete Mixtures”. Buildings 15, no. 20 (2025): 3731. https://doi.org/10.3390/buildings15203731.