Print Email Facebook Twitter A New Method to Quantitatively Characterize the Porosity of Fiber/Matrix Interfacial Transition Zone (ITZ) via Longitudinal Cross-Sections Title A New Method to Quantitatively Characterize the Porosity of Fiber/Matrix Interfacial Transition Zone (ITZ) via Longitudinal Cross-Sections Author He, S. (TU Delft Materials and Environment) Liang, M. (TU Delft Materials and Environment) Yang, En-hua (Nanyang Technological University) Schlangen, E. (TU Delft Materials and Environment) Date 2023 Abstract The properties of the interfacial transition zone (ITZ) between microfiber and cement-based matrix are of primary significance for the overall behavior of strain hardening cementitious composites (SHCCs). However, due to the relatively small diameter of polymeric microfibers (e.g., PVA fiber), it is technically difficult to obtain quantitative and representative information of the properties of the ITZ. In the current study, a new method that is able to quantitatively characterize the microstructural features of the ITZ surrounding a well-aligned microfiber was reported. With the method, the porosity gradients within the ITZs between PVA fiber and cement paste matrices with different water to cement (w/c) ratios were determined. The results show that the matrix surrounding a microfiber were more porous than the bulk matrix. The thickness of this porous region can extend up to 100 microns away from the fiber surface even at a relatively low water to cement ratio (w/c = 0.3). It is thus believed that the method could facilitate the investigation and modification of fiber/matrix bond properties and also contribute to the development of SHCC with superior properties. Subject FiberImage analysisITZPorosity To reference this document use: http://resolver.tudelft.nl/uuid:fd99f613-7c83-49c5-af5c-c1a782c82ef6 DOI https://doi.org/10.1007/978-3-031-15805-6_14 Publisher Springer, Switzerland Embargo date 2023-08-01 ISBN 978-3-031-15804-9 Source Strain Hardening Cementitious Composites: SHCC5, 39 (1) Series RILEM Bookseries, 2211-0844, 39 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type book chapter Rights © 2023 S. He, M. Liang, En-hua Yang, E. Schlangen Files PDF 978_3_031_15805_6_14.pdf 1.78 MB Close viewer /islandora/object/uuid:fd99f613-7c83-49c5-af5c-c1a782c82ef6/datastream/OBJ/view