Mechanical Characterization of Layer-by-Layer Interface in Concrete Elements Obtained by Additive Manufacturing (2020-07)¶
Napolitano Rosanna, , ,
Contribution - Proceedings of the 2nd RILEM International Conference on Concrete and Digital Fabrication, pp. 468-477
Abstract
The anisotropic behavior of the 3D concrete printing elements represents a crucial key feature to be closely investigated. It is mainly due to the layered extrusion process, the most widespread digital concrete technology, which creates weak planes at the interface, known as “Cold Joints”, by placing material layer upon layer. To investigate the interface bond failure mechanism, the bond strength at the interface between layers was measured in this study, especially with respect to printing time gap between layers. In particular, this work provides a characterization of the mechanical properties of 3D printed concrete elements’ interfaces through the design and the implementation of an experimental setup supported by DIC technique, in order to study the shear behavior of layer interfaces. The study investigates different 3d concrete elements produced with 100 s, 200 s, 1800 s as time gap between layer deposition, showing a significant decrease in terms of maximum load up to about 50% for the elements realized with the higher value of resting time compared to bulk elements.
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BibTeX
@inproceedings{napo_menn_aspr_giud.2020.MCoLbLIiCEObAM,
author = "Rosanna Napolitano and Costantino Menna and Domenico Asprone and Lorenzo del Giudice",
title = "Mechanical Characterization of Layer-by-Layer Interface in Concrete Elements Obtained by Additive Manufacturing",
doi = "10.1007/978-3-030-49916-7_48",
year = "2020",
volume = "28",
pages = "468--477",
booktitle = "Proceedings of the 2nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020",
editor = "Freek Paul Bos and Sandra Simaria de Oliveira Lucas and Robert Johannes Maria Wolfs and Theo A. M. Salet",
}
Formatted Citation
R. Napolitano, C. Menna, D. Asprone and L. del Giudice, “Mechanical Characterization of Layer-by-Layer Interface in Concrete Elements Obtained by Additive Manufacturing”, in Proceedings of the 2nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020, 2020, vol. 28, pp. 468–477. doi: 10.1007/978-3-030-49916-7_48.
Napolitano, Rosanna, Costantino Menna, Domenico Asprone, and Lorenzo del Giudice. “Mechanical Characterization of Layer-by-Layer Interface in Concrete Elements Obtained by Additive Manufacturing”. In Proceedings of the 2nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020, edited by Freek Paul Bos, Sandra Simaria de Oliveira Lucas, Robert Johannes Maria Wolfs, and Theo A. M. Salet, 28:468–77, 2020. https://doi.org/10.1007/978-3-030-49916-7_48.