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Unraveling meso-structural evolution in fiber-reinforced concrete with recycled powder: evidence and insights from X-ray computed tomography (CT) and fractal theory.

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Bibliographic Details
Title: Unraveling meso-structural evolution in fiber-reinforced concrete with recycled powder: evidence and insights from X-ray computed tomography (CT) and fractal theory.
Authors: Li, Xiuling1,2 (AUTHOR) dlutiem@163.com, Ma, Rui2 (AUTHOR), Sun, Haodong2 (AUTHOR), Liu, Rui2 (AUTHOR), Bao, Yi3 (AUTHOR), Wen, Long2 (AUTHOR)
Source: Journal of Sustainable Cement-Based Materials. Jul2025, Vol. 14 Issue 7, p1355-1375. 21p.
Subjects: Computed tomography, Fractal dimensions, Fiber-reinforced concrete, Concrete mixing, Three-dimensional imaging
Abstract: This study investigates the damage behavior of fiber-reinforced concrete incorporating recycled concrete powder (RCP) using X-ray computed tomography (CT) and fractal theory. High-resolution 3D CT imaging was used to quantify internal damages, while fractal theory analyzed damage evolution. Results show that adding 20% RCP and fibers increased the concrete's fractal dimension by 10%, highlighting a notable effect on its damage behavior. A strong correlation between fractal dimensions and crack development suggests that fractal analysis can effectively model damage progression. Based on these findings, a novel damage-strain model is proposed, offering a more accurate assessment of concrete damage under loading. This model can be applied to optimize concrete mix designs and improve damage prediction in structural engineering. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This study investigates the damage behavior of fiber-reinforced concrete incorporating recycled concrete powder (RCP) using X-ray computed tomography (CT) and fractal theory. High-resolution 3D CT imaging was used to quantify internal damages, while fractal theory analyzed damage evolution. Results show that adding 20% RCP and fibers increased the concrete's fractal dimension by 10%, highlighting a notable effect on its damage behavior. A strong correlation between fractal dimensions and crack development suggests that fractal analysis can effectively model damage progression. Based on these findings, a novel damage-strain model is proposed, offering a more accurate assessment of concrete damage under loading. This model can be applied to optimize concrete mix designs and improve damage prediction in structural engineering. [ABSTRACT FROM AUTHOR]
ISSN:21650373
DOI:10.1080/21650373.2025.2502142