Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste
A new approach to characterize ITZ between microfiber and cement matrix is reported. Results show that microstructure of hydrated cement paste is highly modified in the vicinity of microfibers, with higher porosity and less anhydrous cement. ITZ can extend up to 100 μm from the interface into the ma...
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sg-ntu-dr.10356-1058232021-02-05T04:54:29Z Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste He, Shan Yang, En-Hua Li, Zhong School of Civil and Environmental Engineering School of Mechanical and Aerospace Engineering DRNTU::Engineering::Civil engineering Interfacial Transition Zone (B) Microstructure (B) A new approach to characterize ITZ between microfiber and cement matrix is reported. Results show that microstructure of hydrated cement paste is highly modified in the vicinity of microfibers, with higher porosity and less anhydrous cement. ITZ can extend up to 100 μm from the interface into the matrix. The larger extent of ITZ suggests that perturbation due to inclusion of microfibers to packing of cement grains is severer than that due to inclusion of aggregates. Furthermore, ITZ between microfiber and cement matrix is highly heterogeneous along its axial direction. Existing ITZ analysis methods performed on 2-D cross-sectional plane intersecting with fiber axis thus can lead to errors and uncertainties. Mechanical properties of ITZ between microfiber and cement matrix are anisotropic. Stiffness and ductility of ITZ in the radial direction are 31% and 28% higher than that in the tangential direction, respectively. Accepted version 2019-06-14T05:21:45Z 2019-12-06T21:58:40Z 2019-06-14T05:21:45Z 2019-12-06T21:58:40Z 2019 2019 Journal Article He, S., Li, Z.,& Yang, E.-H. (2019). Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste. Cement and Concrete Research, 122136-146. doi:10.1016/j.cemconres.2019.05.007 0008-8846 https://hdl.handle.net/10356/105823 http://hdl.handle.net/10220/48759 214587 10.1016/j.cemconres.2019.05.007 214587 214587 en Cement and Concrete Research Cement and Concrete Research © 2019 Elsevier. All rights reserved. This paper was published in Cement and Concrete Research and is made available with permission of Elsevier. 41 p. application/pdf |
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DRNTU::Engineering::Civil engineering Interfacial Transition Zone (B) Microstructure (B) He, Shan Yang, En-Hua Li, Zhong Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste |
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A new approach to characterize ITZ between microfiber and cement matrix is reported. Results show that microstructure of hydrated cement paste is highly modified in the vicinity of microfibers, with higher porosity and less anhydrous cement. ITZ can extend up to 100 μm from the interface into the matrix. The larger extent of ITZ suggests that perturbation due to inclusion of microfibers to packing of cement grains is severer than that due to inclusion of aggregates. Furthermore, ITZ between microfiber and cement matrix is highly heterogeneous along its axial direction. Existing ITZ analysis methods performed on 2-D cross-sectional plane intersecting with fiber axis thus can lead to errors and uncertainties. Mechanical properties of ITZ between microfiber and cement matrix are anisotropic. Stiffness and ductility of ITZ in the radial direction are 31% and 28% higher than that in the tangential direction, respectively. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering He, Shan Yang, En-Hua Li, Zhong |
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Article |
author |
He, Shan Yang, En-Hua Li, Zhong |
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He, Shan |
title |
Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste |
title_short |
Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste |
title_full |
Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste |
title_fullStr |
Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste |
title_full_unstemmed |
Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ) between microfiber and cement paste |
title_sort |
quantitative characterization of anisotropic properties of the interfacial transition zone (itz) between microfiber and cement paste |
publishDate |
2019 |
url |
https://hdl.handle.net/10356/105823 http://hdl.handle.net/10220/48759 |
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1692012977499144192 |