Effect of carbonation on cement paste microstructure characterized by micro-computed tomography

Ji Su Kim; Kwang Soo Youm; Jae Hong Lim; Tong Seok Han

doi:10.1016/j.conbuildmat.2020.120079

Effect of carbonation on cement paste microstructure characterized by micro-computed tomography

Ji Su Kim, Kwang Soo Youm, Jae Hong Lim, Tong Seok Han

Department of Civil Engineering

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

18 Scopus citations

Abstract

The carbonation of cement paste changes its microstructural characteristics. The porosity of the cement paste microstructure is reduced when calcite is produced from the reaction between portlandite and carbon dioxide. In this study, such microstructural changes were investigated using image analyses of the 3D microstructures obtained with synchrotron micro-computed tomography (CT). When two sets of samples were subjected to different degrees of carbonation, the porosity and pore size reductions were identified from the micro-CT images. The formation of calcite caused by the reaction of portlandite was indirectly identified by the reduction of the mean grayscale value or linear attenuation coefficient (LAC) of the solid phase voxels. It was confirmed that micro-CT could also be used as a supplementary tool for the analysis of the microstructural evolution of cement paste under carbonation.

Original language	English
Article number	120079
Journal	Construction and Building Materials
Volume	263
DOIs	https://doi.org/10.1016/j.conbuildmat.2020.120079
State	Published - 10 Dec 2020

Keywords

Carbonation
Cement paste
Linear attenuation coefficient
Micro-CT
Microstructure
Pore structure

Access to Document

10.1016/j.conbuildmat.2020.120079

Cite this

@article{39b1b406eabf466cae501f5a215f2891,

title = "Effect of carbonation on cement paste microstructure characterized by micro-computed tomography",

abstract = "The carbonation of cement paste changes its microstructural characteristics. The porosity of the cement paste microstructure is reduced when calcite is produced from the reaction between portlandite and carbon dioxide. In this study, such microstructural changes were investigated using image analyses of the 3D microstructures obtained with synchrotron micro-computed tomography (CT). When two sets of samples were subjected to different degrees of carbonation, the porosity and pore size reductions were identified from the micro-CT images. The formation of calcite caused by the reaction of portlandite was indirectly identified by the reduction of the mean grayscale value or linear attenuation coefficient (LAC) of the solid phase voxels. It was confirmed that micro-CT could also be used as a supplementary tool for the analysis of the microstructural evolution of cement paste under carbonation.",

keywords = "Carbonation, Cement paste, Linear attenuation coefficient, Micro-CT, Microstructure, Pore structure",

author = "Kim, {Ji Su} and Youm, {Kwang Soo} and Lim, {Jae Hong} and Han, {Tong Seok}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = dec,

day = "10",

doi = "10.1016/j.conbuildmat.2020.120079",

language = "English",

volume = "263",

journal = "Construction and Building Materials",

issn = "0950-0618",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Effect of carbonation on cement paste microstructure characterized by micro-computed tomography

AU - Kim, Ji Su

AU - Youm, Kwang Soo

AU - Lim, Jae Hong

AU - Han, Tong Seok

PY - 2020/12/10

Y1 - 2020/12/10

N2 - The carbonation of cement paste changes its microstructural characteristics. The porosity of the cement paste microstructure is reduced when calcite is produced from the reaction between portlandite and carbon dioxide. In this study, such microstructural changes were investigated using image analyses of the 3D microstructures obtained with synchrotron micro-computed tomography (CT). When two sets of samples were subjected to different degrees of carbonation, the porosity and pore size reductions were identified from the micro-CT images. The formation of calcite caused by the reaction of portlandite was indirectly identified by the reduction of the mean grayscale value or linear attenuation coefficient (LAC) of the solid phase voxels. It was confirmed that micro-CT could also be used as a supplementary tool for the analysis of the microstructural evolution of cement paste under carbonation.

AB - The carbonation of cement paste changes its microstructural characteristics. The porosity of the cement paste microstructure is reduced when calcite is produced from the reaction between portlandite and carbon dioxide. In this study, such microstructural changes were investigated using image analyses of the 3D microstructures obtained with synchrotron micro-computed tomography (CT). When two sets of samples were subjected to different degrees of carbonation, the porosity and pore size reductions were identified from the micro-CT images. The formation of calcite caused by the reaction of portlandite was indirectly identified by the reduction of the mean grayscale value or linear attenuation coefficient (LAC) of the solid phase voxels. It was confirmed that micro-CT could also be used as a supplementary tool for the analysis of the microstructural evolution of cement paste under carbonation.

KW - Carbonation

KW - Cement paste

KW - Linear attenuation coefficient

KW - Micro-CT

KW - Microstructure

KW - Pore structure

UR - http://www.scopus.com/inward/record.url?scp=85087940663&partnerID=8YFLogxK

U2 - 10.1016/j.conbuildmat.2020.120079

DO - 10.1016/j.conbuildmat.2020.120079

M3 - Article

AN - SCOPUS:85087940663

SN - 0950-0618

VL - 263

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 120079

ER -

Effect of carbonation on cement paste microstructure characterized by micro-computed tomography

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this