Correlation between microstructural characteristics from micro-CT of foamed concrete and mechanical behaviors evaluated by experiments and simulations

Ji Su Kim; Sang Yeop Chung; Tong Seok Han; Dietmar Stephan; Mohamed Abd Elrahman

doi:10.1016/j.cemconcomp.2020.103657

Correlation between microstructural characteristics from micro-CT of foamed concrete and mechanical behaviors evaluated by experiments and simulations

Ji Su Kim, Sang Yeop Chung, Tong Seok Han, Dietmar Stephan, Mohamed Abd Elrahman

Department of Civil and Environmental Engineering

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

21 Citations (Scopus)

Abstract

Microstructural characteristics and properties of foamed concrete, a cellular lightweight cement paste with entrained air voids, are investigated. The complex 3D microstructures of the foamed concrete with different densities are obtained by micro-CT imaging and binarized as two-phase (pore/solid) materials by image processing. The mechanical responses of the microstructures are evaluated by simulations within the phase-field fracture model, and the input material parameters for simulations are identified. Microstructural characteristics and properties from experiments and simulations are correlated. In particular, linear attenuation coefficients for the solid phase in micro-CT images correlate with input material parameters. These correlations can serve to determine solid-phase input material parameters in foamed concretes with different densities. The behavior of foamed-concrete binders, modeled as multi-phase solids, should thus be evaluated more accurately through simulations, based on the observed correlations.

Original language	English
Article number	103657
Journal	Cement and Concrete Composites
Volume	112
DOIs	https://doi.org/10.1016/j.cemconcomp.2020.103657
Publication status	Published - 2020 Sept

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation Grant ( NRF-2019R1A2C2086314 ), by the German Federal Ministry of Education and Research (BMBF, Project Number: 13XP5010B ), and by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) , the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20174030201480 ). X-ray CT images were provided by Dr. Paul H. Kamm at the Helmholtz-Zentrum Berlin in Germany.

Funding Information:
This research was supported by the National Research Foundation Grant (NRF-2019R1A2C2086314), by the German Federal Ministry of Education and Research (BMBF, Project Number: 13XP5010B), and by the Korea Institute of Energy Technology Evaluation and Planning (KETEP), the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20174030201480). X-ray CT images were provided by Dr. Paul H. Kamm at the Helmholtz-Zentrum Berlin in Germany.

Publisher Copyright:
© 2020 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Building and Construction
Materials Science(all)

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10.1016/j.cemconcomp.2020.103657

Cite this

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title = "Correlation between microstructural characteristics from micro-CT of foamed concrete and mechanical behaviors evaluated by experiments and simulations",

abstract = "Microstructural characteristics and properties of foamed concrete, a cellular lightweight cement paste with entrained air voids, are investigated. The complex 3D microstructures of the foamed concrete with different densities are obtained by micro-CT imaging and binarized as two-phase (pore/solid) materials by image processing. The mechanical responses of the microstructures are evaluated by simulations within the phase-field fracture model, and the input material parameters for simulations are identified. Microstructural characteristics and properties from experiments and simulations are correlated. In particular, linear attenuation coefficients for the solid phase in micro-CT images correlate with input material parameters. These correlations can serve to determine solid-phase input material parameters in foamed concretes with different densities. The behavior of foamed-concrete binders, modeled as multi-phase solids, should thus be evaluated more accurately through simulations, based on the observed correlations.",

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

note = "Funding Information: This research was supported by the National Research Foundation Grant ( NRF-2019R1A2C2086314 ), by the German Federal Ministry of Education and Research (BMBF, Project Number: 13XP5010B ), and by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) , the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20174030201480 ). X-ray CT images were provided by Dr. Paul H. Kamm at the Helmholtz-Zentrum Berlin in Germany. Funding Information: This research was supported by the National Research Foundation Grant (NRF-2019R1A2C2086314), by the German Federal Ministry of Education and Research (BMBF, Project Number: 13XP5010B), and by the Korea Institute of Energy Technology Evaluation and Planning (KETEP), the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20174030201480). X-ray CT images were provided by Dr. Paul H. Kamm at the Helmholtz-Zentrum Berlin in Germany. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

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N2 - Microstructural characteristics and properties of foamed concrete, a cellular lightweight cement paste with entrained air voids, are investigated. The complex 3D microstructures of the foamed concrete with different densities are obtained by micro-CT imaging and binarized as two-phase (pore/solid) materials by image processing. The mechanical responses of the microstructures are evaluated by simulations within the phase-field fracture model, and the input material parameters for simulations are identified. Microstructural characteristics and properties from experiments and simulations are correlated. In particular, linear attenuation coefficients for the solid phase in micro-CT images correlate with input material parameters. These correlations can serve to determine solid-phase input material parameters in foamed concretes with different densities. The behavior of foamed-concrete binders, modeled as multi-phase solids, should thus be evaluated more accurately through simulations, based on the observed correlations.

AB - Microstructural characteristics and properties of foamed concrete, a cellular lightweight cement paste with entrained air voids, are investigated. The complex 3D microstructures of the foamed concrete with different densities are obtained by micro-CT imaging and binarized as two-phase (pore/solid) materials by image processing. The mechanical responses of the microstructures are evaluated by simulations within the phase-field fracture model, and the input material parameters for simulations are identified. Microstructural characteristics and properties from experiments and simulations are correlated. In particular, linear attenuation coefficients for the solid phase in micro-CT images correlate with input material parameters. These correlations can serve to determine solid-phase input material parameters in foamed concretes with different densities. The behavior of foamed-concrete binders, modeled as multi-phase solids, should thus be evaluated more accurately through simulations, based on the observed correlations.

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Correlation between microstructural characteristics from micro-CT of foamed concrete and mechanical behaviors evaluated by experiments and simulations

Abstract

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