Gradient-based phase segmentation method for characterization of hydrating cement paste microstructures obtained from X-ray micro-CT

Ji Su Kim; Jeewoo Suh; Junil Pae; Juhyuk Moon; Tong Seok Han

doi:10.1016/j.jobe.2021.103721

Gradient-based phase segmentation method for characterization of hydrating cement paste microstructures obtained from X-ray micro-CT

Ji Su Kim, Jeewoo Suh, Junil Pae, Juhyuk Moon, Tong Seok Han

Department of Civil and Environmental Engineering

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

4 Citations (Scopus)

Abstract

X-ray micro-computed tomography (micro-CT) has been widely used in the non-destructive investigation of 3D microstructures of cementitious materials. Microstructures from micro-CT are reconstructed from the attenuated transmitted X-ray intensity through a sample or linear attenuation coefficient (LAC). Although uncertainties can be introduced during processes, such as data collection and microstructure reconstruction, the LAC values are determined based on the X-ray energy level and material composition so that they can be considered as almost absolute measures. In this study, the microstructural evolution of cement paste during hydration was investigated using microstructures with a 4.5 μm voxel size obtained from X-ray micro-CT. A new phase segmentation method based on the mean LAC values for the pore and unhydrated phases inside the binder was developed. The pore phase features were characterized by porosity, equivalent pore diameter, and two-point probability functions. The findings indicate that the proposed segmentation method is well adapted for micro-CT imaging to identify the characteristics of pores, hydrates, and clinkers.

Original language	English
Article number	103721
Journal	Journal of Building Engineering
Volume	46
DOIs	https://doi.org/10.1016/j.jobe.2021.103721
Publication status	Published - 2022 Apr 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea ( NRF-2019R1A2C2086314 ). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning ( KETEP ) and the Ministry of Trade, Industry & Energy ( MOTIE ) of the Republic of Korea (No. 20 194 030 202 460 ). The authors would like to thank Dr. Hunhee Lee and Mr. Younghyun Lee from Halla Cement Corp. for providing the cement and its information.

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF-2019R1A2C2086314). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20?194?030?202?460). The authors would like to thank Dr. Hunhee Lee and Mr. Younghyun Lee from Halla Cement Corp. for providing the cement and its information.

Publisher Copyright:
© 2021 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Architecture
Building and Construction
Safety, Risk, Reliability and Quality
Mechanics of Materials

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10.1016/j.jobe.2021.103721

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title = "Gradient-based phase segmentation method for characterization of hydrating cement paste microstructures obtained from X-ray micro-CT",

abstract = "X-ray micro-computed tomography (micro-CT) has been widely used in the non-destructive investigation of 3D microstructures of cementitious materials. Microstructures from micro-CT are reconstructed from the attenuated transmitted X-ray intensity through a sample or linear attenuation coefficient (LAC). Although uncertainties can be introduced during processes, such as data collection and microstructure reconstruction, the LAC values are determined based on the X-ray energy level and material composition so that they can be considered as almost absolute measures. In this study, the microstructural evolution of cement paste during hydration was investigated using microstructures with a 4.5 μm voxel size obtained from X-ray micro-CT. A new phase segmentation method based on the mean LAC values for the pore and unhydrated phases inside the binder was developed. The pore phase features were characterized by porosity, equivalent pore diameter, and two-point probability functions. The findings indicate that the proposed segmentation method is well adapted for micro-CT imaging to identify the characteristics of pores, hydrates, and clinkers.",

author = "Kim, {Ji Su} and Jeewoo Suh and Junil Pae and Juhyuk Moon and Han, {Tong Seok}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea ( NRF-2019R1A2C2086314 ). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning ( KETEP ) and the Ministry of Trade, Industry & Energy ( MOTIE ) of the Republic of Korea (No. 20 194 030 202 460 ). The authors would like to thank Dr. Hunhee Lee and Mr. Younghyun Lee from Halla Cement Corp. for providing the cement and its information. Funding Information: This work was supported by the National Research Foundation of Korea (NRF-2019R1A2C2086314). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20?194?030?202?460). The authors would like to thank Dr. Hunhee Lee and Mr. Younghyun Lee from Halla Cement Corp. for providing the cement and its information. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

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AU - Moon, Juhyuk

AU - Han, Tong Seok

N1 - Funding Information: This work was supported by the National Research Foundation of Korea ( NRF-2019R1A2C2086314 ). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning ( KETEP ) and the Ministry of Trade, Industry & Energy ( MOTIE ) of the Republic of Korea (No. 20 194 030 202 460 ). The authors would like to thank Dr. Hunhee Lee and Mr. Younghyun Lee from Halla Cement Corp. for providing the cement and its information. Funding Information: This work was supported by the National Research Foundation of Korea (NRF-2019R1A2C2086314). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20?194?030?202?460). The authors would like to thank Dr. Hunhee Lee and Mr. Younghyun Lee from Halla Cement Corp. for providing the cement and its information. Publisher Copyright: © 2021 Elsevier Ltd

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N2 - X-ray micro-computed tomography (micro-CT) has been widely used in the non-destructive investigation of 3D microstructures of cementitious materials. Microstructures from micro-CT are reconstructed from the attenuated transmitted X-ray intensity through a sample or linear attenuation coefficient (LAC). Although uncertainties can be introduced during processes, such as data collection and microstructure reconstruction, the LAC values are determined based on the X-ray energy level and material composition so that they can be considered as almost absolute measures. In this study, the microstructural evolution of cement paste during hydration was investigated using microstructures with a 4.5 μm voxel size obtained from X-ray micro-CT. A new phase segmentation method based on the mean LAC values for the pore and unhydrated phases inside the binder was developed. The pore phase features were characterized by porosity, equivalent pore diameter, and two-point probability functions. The findings indicate that the proposed segmentation method is well adapted for micro-CT imaging to identify the characteristics of pores, hydrates, and clinkers.

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Gradient-based phase segmentation method for characterization of hydrating cement paste microstructures obtained from X-ray micro-CT

Abstract

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