Pore and Solid Characterizations of Interfacial Transition Zone of Mortar Using Microcomputed Tomography Images

Sang Yeop Chung; Ji Su Kim; Paul H. Kamm; Dietmar Stephan; Tong Seok Han; Mohamed Abd Elrahman

doi:10.1061/(ASCE)MT.1943-5533.0003986

Pore and Solid Characterizations of Interfacial Transition Zone of Mortar Using Microcomputed Tomography Images

Sang Yeop Chung, Ji Su Kim, Paul H. Kamm, Dietmar Stephan, Tong Seok Han, Mohamed Abd Elrahman

Department of Civil Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The interfacial transition zone (ITZ) in concrete is known as the weakest link of the material, and significantly affects the properties of concrete. This study aims to investigate the actual microstructure of the ITZ using microcomputed tomography (micro-CT) in three dimensions (3D). For this purpose, high-resolution synchrotron micro-CT images of materials are used to visualize and examine the 3D ITZ of cement-based specimens. A set of mortar specimens with different water-cement (w/c) ratios as well as different aggregate types and sizes were prepared and compared to investigate the effect of each condition on the characteristics of the ITZ. The microstructural characteristics of the pores and the solid structures of the ITZ are characterized based on the information of grayscale images. The obtained results show the effective investigation on the pore and solid characteristics of the ITZ microstructure by using 3D nondestructive micro-CT; this approach is useful for further detailed investigation of the ITZ.

Original language	English
Article number	04021348
Journal	Journal of Materials in Civil Engineering
Volume	33
Issue number	12
DOIs	https://doi.org/10.1061/(ASCE)MT.1943-5533.0003986
State	Published - 1 Dec 2021

Keywords

Interfacial transition zone (ITZ)
Microcomputed tomography (micro-CT)
Microstructure
Mortar
Porosity

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10.1061/(ASCE)MT.1943-5533.0003986

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title = "Pore and Solid Characterizations of Interfacial Transition Zone of Mortar Using Microcomputed Tomography Images",

abstract = "The interfacial transition zone (ITZ) in concrete is known as the weakest link of the material, and significantly affects the properties of concrete. This study aims to investigate the actual microstructure of the ITZ using microcomputed tomography (micro-CT) in three dimensions (3D). For this purpose, high-resolution synchrotron micro-CT images of materials are used to visualize and examine the 3D ITZ of cement-based specimens. A set of mortar specimens with different water-cement (w/c) ratios as well as different aggregate types and sizes were prepared and compared to investigate the effect of each condition on the characteristics of the ITZ. The microstructural characteristics of the pores and the solid structures of the ITZ are characterized based on the information of grayscale images. The obtained results show the effective investigation on the pore and solid characteristics of the ITZ microstructure by using 3D nondestructive micro-CT; this approach is useful for further detailed investigation of the ITZ.",

keywords = "Interfacial transition zone (ITZ), Microcomputed tomography (micro-CT), Microstructure, Mortar, Porosity",

author = "Chung, {Sang Yeop} and Kim, {Ji Su} and Kamm, {Paul H.} and Dietmar Stephan and Han, {Tong Seok} and {Abd Elrahman}, Mohamed",

note = "Publisher Copyright: {\textcopyright} 2021 American Society of Civil Engineers.",

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doi = "10.1061/(ASCE)MT.1943-5533.0003986",

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AU - Chung, Sang Yeop

AU - Kim, Ji Su

AU - Kamm, Paul H.

AU - Stephan, Dietmar

AU - Han, Tong Seok

AU - Abd Elrahman, Mohamed

PY - 2021/12/1

Y1 - 2021/12/1

N2 - The interfacial transition zone (ITZ) in concrete is known as the weakest link of the material, and significantly affects the properties of concrete. This study aims to investigate the actual microstructure of the ITZ using microcomputed tomography (micro-CT) in three dimensions (3D). For this purpose, high-resolution synchrotron micro-CT images of materials are used to visualize and examine the 3D ITZ of cement-based specimens. A set of mortar specimens with different water-cement (w/c) ratios as well as different aggregate types and sizes were prepared and compared to investigate the effect of each condition on the characteristics of the ITZ. The microstructural characteristics of the pores and the solid structures of the ITZ are characterized based on the information of grayscale images. The obtained results show the effective investigation on the pore and solid characteristics of the ITZ microstructure by using 3D nondestructive micro-CT; this approach is useful for further detailed investigation of the ITZ.

AB - The interfacial transition zone (ITZ) in concrete is known as the weakest link of the material, and significantly affects the properties of concrete. This study aims to investigate the actual microstructure of the ITZ using microcomputed tomography (micro-CT) in three dimensions (3D). For this purpose, high-resolution synchrotron micro-CT images of materials are used to visualize and examine the 3D ITZ of cement-based specimens. A set of mortar specimens with different water-cement (w/c) ratios as well as different aggregate types and sizes were prepared and compared to investigate the effect of each condition on the characteristics of the ITZ. The microstructural characteristics of the pores and the solid structures of the ITZ are characterized based on the information of grayscale images. The obtained results show the effective investigation on the pore and solid characteristics of the ITZ microstructure by using 3D nondestructive micro-CT; this approach is useful for further detailed investigation of the ITZ.

KW - Interfacial transition zone (ITZ)

KW - Microcomputed tomography (micro-CT)

KW - Microstructure

KW - Mortar

KW - Porosity

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JF - Journal of Materials in Civil Engineering

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M1 - 04021348

ER -

Pore and Solid Characterizations of Interfacial Transition Zone of Mortar Using Microcomputed Tomography Images

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