Issues on characterization of cement paste microstructures from μ-CT and virtual experiment framework for evaluating mechanical properties

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

doi:10.1016/j.conbuildmat.2019.01.030

Issues on characterization of cement paste microstructures from μ-CT and virtual experiment framework for evaluating mechanical properties

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

Department of Civil and Environmental Engineering

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

39 Citations (Scopus)

Abstract

There are issues on the microstructure characterization of cement paste obtained from μ-CT due to resolution limits, and evaluation of properties through virtual experiments. A phase separation procedure between the solid and pore phases, which can be used for pure cement paste microstructures, is proposed. The problems of underestimation of microstructural characteristics such as porosity in virtual specimens from μ-CT, as compared to real specimens, are addressed. Reflecting such underestimation, the process of input modeling parameter determination for virtual experiments on mechanical property evaluation using the phase field fracture model is elaborated. Through virtual tests, the effects of domain size and mesh resolution on the evaluated properties are investigated, and the correlation between the microstructural characterization parameters and mechanical properties is reconfirmed. It is shown that the virtual experiment framework proposed in this study can be used as a loading tool to supplement time and effort consuming real experiments for evaluating the mechanical properties of cement paste at the micro-scale.

Original language	English
Pages (from-to)	82-102
Number of pages	21
Journal	Construction and Building Materials
Volume	202
DOIs	https://doi.org/10.1016/j.conbuildmat.2019.01.030
Publication status	Published - 2019 Mar 30

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation Grant , funded by the Korean Government and the German Federal Ministry of Education for KONNECT Joint Call project (NRF-2015K1A3A1A59073929/BMBF Project number: 01DR16007). This research was also supported by grants from the Korea Research Foundation ( NRF-2016R1D1A1B03931635 ) and 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. 20174030201480 ). Parallel computation in this work was supported by the PLSI supercomputing resources of the Korea Institute of Science and Technology Information and the resources of the UNIST Supercomputing Center. -CT images were obtained from the synchrotron operated by the Pohang Accelerator Laboratory (PAL) in Korea.

Publisher Copyright:
© 2019 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Building and Construction
Materials Science(all)

Access to Document

10.1016/j.conbuildmat.2019.01.030

Cite this

@article{11110aeaec7b4089a02094d2b8334112,

title = "Issues on characterization of cement paste microstructures from μ-CT and virtual experiment framework for evaluating mechanical properties",

abstract = "There are issues on the microstructure characterization of cement paste obtained from μ-CT due to resolution limits, and evaluation of properties through virtual experiments. A phase separation procedure between the solid and pore phases, which can be used for pure cement paste microstructures, is proposed. The problems of underestimation of microstructural characteristics such as porosity in virtual specimens from μ-CT, as compared to real specimens, are addressed. Reflecting such underestimation, the process of input modeling parameter determination for virtual experiments on mechanical property evaluation using the phase field fracture model is elaborated. Through virtual tests, the effects of domain size and mesh resolution on the evaluated properties are investigated, and the correlation between the microstructural characterization parameters and mechanical properties is reconfirmed. It is shown that the virtual experiment framework proposed in this study can be used as a loading tool to supplement time and effort consuming real experiments for evaluating the mechanical properties of cement paste at the micro-scale.",

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

note = "Funding Information: This research was supported by the National Research Foundation Grant , funded by the Korean Government and the German Federal Ministry of Education for KONNECT Joint Call project (NRF-2015K1A3A1A59073929/BMBF Project number: 01DR16007). This research was also supported by grants from the Korea Research Foundation ( NRF-2016R1D1A1B03931635 ) and 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. 20174030201480 ). Parallel computation in this work was supported by the PLSI supercomputing resources of the Korea Institute of Science and Technology Information and the resources of the UNIST Supercomputing Center. -CT images were obtained from the synchrotron operated by the Pohang Accelerator Laboratory (PAL) in Korea. Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = mar,

day = "30",

doi = "10.1016/j.conbuildmat.2019.01.030",

language = "English",

volume = "202",

pages = "82--102",

journal = "Construction and Building Materials",

issn = "0950-0618",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Issues on characterization of cement paste microstructures from μ-CT and virtual experiment framework for evaluating mechanical properties

AU - Kim, Ji Su

AU - Chung, Sang Yeop

AU - Stephan, Dietmar

AU - Han, Tong Seok

N1 - Funding Information: This research was supported by the National Research Foundation Grant , funded by the Korean Government and the German Federal Ministry of Education for KONNECT Joint Call project (NRF-2015K1A3A1A59073929/BMBF Project number: 01DR16007). This research was also supported by grants from the Korea Research Foundation ( NRF-2016R1D1A1B03931635 ) and 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. 20174030201480 ). Parallel computation in this work was supported by the PLSI supercomputing resources of the Korea Institute of Science and Technology Information and the resources of the UNIST Supercomputing Center. -CT images were obtained from the synchrotron operated by the Pohang Accelerator Laboratory (PAL) in Korea. Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/3/30

Y1 - 2019/3/30

N2 - There are issues on the microstructure characterization of cement paste obtained from μ-CT due to resolution limits, and evaluation of properties through virtual experiments. A phase separation procedure between the solid and pore phases, which can be used for pure cement paste microstructures, is proposed. The problems of underestimation of microstructural characteristics such as porosity in virtual specimens from μ-CT, as compared to real specimens, are addressed. Reflecting such underestimation, the process of input modeling parameter determination for virtual experiments on mechanical property evaluation using the phase field fracture model is elaborated. Through virtual tests, the effects of domain size and mesh resolution on the evaluated properties are investigated, and the correlation between the microstructural characterization parameters and mechanical properties is reconfirmed. It is shown that the virtual experiment framework proposed in this study can be used as a loading tool to supplement time and effort consuming real experiments for evaluating the mechanical properties of cement paste at the micro-scale.

AB - There are issues on the microstructure characterization of cement paste obtained from μ-CT due to resolution limits, and evaluation of properties through virtual experiments. A phase separation procedure between the solid and pore phases, which can be used for pure cement paste microstructures, is proposed. The problems of underestimation of microstructural characteristics such as porosity in virtual specimens from μ-CT, as compared to real specimens, are addressed. Reflecting such underestimation, the process of input modeling parameter determination for virtual experiments on mechanical property evaluation using the phase field fracture model is elaborated. Through virtual tests, the effects of domain size and mesh resolution on the evaluated properties are investigated, and the correlation between the microstructural characterization parameters and mechanical properties is reconfirmed. It is shown that the virtual experiment framework proposed in this study can be used as a loading tool to supplement time and effort consuming real experiments for evaluating the mechanical properties of cement paste at the micro-scale.

UR - http://www.scopus.com/inward/record.url?scp=85059742486&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059742486&partnerID=8YFLogxK

U2 - 10.1016/j.conbuildmat.2019.01.030

DO - 10.1016/j.conbuildmat.2019.01.030

M3 - Article

AN - SCOPUS:85059742486

SN - 0950-0618

VL - 202

SP - 82

EP - 102

JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

Issues on characterization of cement paste microstructures from μ-CT and virtual experiment framework for evaluating mechanical properties

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this