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...

Full description

Saved in:
Bibliographic Details
Main Authors: He, Shan, Yang, En-Hua, Li, Zhong
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2019
Subjects:
Online Access:https://hdl.handle.net/10356/105823
http://hdl.handle.net/10220/48759
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-105823
record_format dspace
spelling 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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering
Interfacial Transition Zone (B)
Microstructure (B)
spellingShingle 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
description 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.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
He, Shan
Yang, En-Hua
Li, Zhong
format Article
author He, Shan
Yang, En-Hua
Li, Zhong
author_sort 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
_version_ 1692012977499144192