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On the role of porous aggregates in the fracture mechanisms of lightweight concrete using XCT and Machine Learning
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SYSNO ASEP 0619392 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title On the role of porous aggregates in the fracture mechanisms of lightweight concrete using XCT and Machine Learning Author(s) Karatza, Z. (GR)
Gkikizas Lampropoulos, N. (GB)
Tsivolas, K. (GR)
Kumpová, Ivana (UTAM-F) RID, SAI, ORCID
Sotiriadis, Konstantinos (UTAM-F) RID, ORCID, SAI
Nomikos, P. P. (GR)
Badogiannis, E. (GR)Number of authors 7 Article number 012092 Source Title IOP Conference Series: Earth and Environmental Science, TC 105 International Symposium, 1480. - Bristol : IOP Publishing, 2025 - ISSN 1755-1307 Number of pages 4 s. Publication form Online - E Action International Symposium on Geomechanics from Micro to Macro /5./ Event date 23.09.2024 - 27.09.2024 VEvent location Grenoble Country FR - France Event type WRD Language eng - English Country GB - United Kingdom Keywords lightweight concrete (LWC) ; sustainable materials ; X-ray computed tomography (XCT) OECD category Materials engineering Institutional support UTAM-F - RVO:68378297 EID SCOPUS 105003413481 DOI https://doi.org/10.1088/1755-1315/1480/1/012092 Annotation Replacing limestone aggregates with lightweight ones, such as pumice, results in more sustainable concrete. However, cracking at early ages poses a significant concern for its structural use. In this work, we use X-ray computed tomography to study cylindrical lightweight concrete specimens before and after uniaxial compression to enhance our understanding of how pumice affects the development of tension cracks in the concrete matrix. The results show smaller particles and those with a higher aspect ratio break less. Whilst there’s no proof that the orientation of the particles affects breakage, there are indications that the internal porosity of the particles is highly anisotropic, and its orientation with respect to the loading direction will determine whether the pumice will break or not. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2026
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