Quantifying the distribution of paste-void spacing of hardened cement paste using X-ray computed tomography

Tae Sup Yun; Kwang Yeom Kim; Jinhyun Choo; Dong Hun Kang

doi:10.1016/j.matchar.2012.08.008

Quantifying the distribution of paste-void spacing of hardened cement paste using X-ray computed tomography

Tae Sup Yun, Kwang Yeom Kim, Jinhyun Choo, Dong Hun Kang

Department of Civil and Environmental Engineering

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

30 Citations (Scopus)

Abstract

The distribution of paste-void spacing in cement-based materials is an important feature related to the freeze-thaw durability of these materials, but its reliable estimation remains an unresolved problem. Herein, we evaluate the capability of X-ray computed tomography (CT) for reliable quantification of the distribution of paste-void spacing. Using X-ray CT images of three mortar specimens having different air-entrainment characteristics, we calculate the distributions of paste-void spacing of the specimens by applying previously suggested methods for deriving the exact spacing of air-void systems. This methodology is assessed by comparing the 95th percentile of the cumulative distribution function of the paste-void spacing with spacing factors computed by applying the linear-traverse method to 3D air-void system and reconstructing equivalent air-void distribution in 3D. Results show that the distributions of equivalent void diameter and paste-void spacing follow lognormal and normal distributions, respectively, and the ratios between the 95th percentile paste-void spacing value and the spacing factors reside within the ranges reported by previous numerical studies. This experimental finding indicates that the distribution of paste-void spacing quantified using X-ray CT has the potential to be the basis for a statistical assessment of the freeze-thaw durability of cement-based materials.

Original language	English
Pages (from-to)	137-143
Number of pages	7
Journal	Materials Characterization
Volume	73
DOIs	https://doi.org/10.1016/j.matchar.2012.08.008
Publication status	Published - 2012 Nov

Bibliographical note

Funding Information:
Financial support for this work was provided by grants from the Basic Science Research Program of the National Research Foundation of Korea (NRF) , funded by the Ministry of Education, Science and Technology (Nos. 2011‐0022883 and 2011‐0005593 ), and a grant from the New & Renewable Energy program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) , funded by the Korean Government Ministry of Knowledge Economy (No. 2010T100200494 ).

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matchar.2012.08.008

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title = "Quantifying the distribution of paste-void spacing of hardened cement paste using X-ray computed tomography",

abstract = "The distribution of paste-void spacing in cement-based materials is an important feature related to the freeze-thaw durability of these materials, but its reliable estimation remains an unresolved problem. Herein, we evaluate the capability of X-ray computed tomography (CT) for reliable quantification of the distribution of paste-void spacing. Using X-ray CT images of three mortar specimens having different air-entrainment characteristics, we calculate the distributions of paste-void spacing of the specimens by applying previously suggested methods for deriving the exact spacing of air-void systems. This methodology is assessed by comparing the 95th percentile of the cumulative distribution function of the paste-void spacing with spacing factors computed by applying the linear-traverse method to 3D air-void system and reconstructing equivalent air-void distribution in 3D. Results show that the distributions of equivalent void diameter and paste-void spacing follow lognormal and normal distributions, respectively, and the ratios between the 95th percentile paste-void spacing value and the spacing factors reside within the ranges reported by previous numerical studies. This experimental finding indicates that the distribution of paste-void spacing quantified using X-ray CT has the potential to be the basis for a statistical assessment of the freeze-thaw durability of cement-based materials.",

author = "Yun, {Tae Sup} and Kim, {Kwang Yeom} and Jinhyun Choo and Kang, {Dong Hun}",

note = "Funding Information: Financial support for this work was provided by grants from the Basic Science Research Program of the National Research Foundation of Korea (NRF) , funded by the Ministry of Education, Science and Technology (Nos. 2011‐0022883 and 2011‐0005593 ), and a grant from the New & Renewable Energy program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) , funded by the Korean Government Ministry of Knowledge Economy (No. 2010T100200494 ).",

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AU - Kim, Kwang Yeom

AU - Choo, Jinhyun

AU - Kang, Dong Hun

N1 - Funding Information: Financial support for this work was provided by grants from the Basic Science Research Program of the National Research Foundation of Korea (NRF) , funded by the Ministry of Education, Science and Technology (Nos. 2011‐0022883 and 2011‐0005593 ), and a grant from the New & Renewable Energy program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) , funded by the Korean Government Ministry of Knowledge Economy (No. 2010T100200494 ).

PY - 2012/11

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N2 - The distribution of paste-void spacing in cement-based materials is an important feature related to the freeze-thaw durability of these materials, but its reliable estimation remains an unresolved problem. Herein, we evaluate the capability of X-ray computed tomography (CT) for reliable quantification of the distribution of paste-void spacing. Using X-ray CT images of three mortar specimens having different air-entrainment characteristics, we calculate the distributions of paste-void spacing of the specimens by applying previously suggested methods for deriving the exact spacing of air-void systems. This methodology is assessed by comparing the 95th percentile of the cumulative distribution function of the paste-void spacing with spacing factors computed by applying the linear-traverse method to 3D air-void system and reconstructing equivalent air-void distribution in 3D. Results show that the distributions of equivalent void diameter and paste-void spacing follow lognormal and normal distributions, respectively, and the ratios between the 95th percentile paste-void spacing value and the spacing factors reside within the ranges reported by previous numerical studies. This experimental finding indicates that the distribution of paste-void spacing quantified using X-ray CT has the potential to be the basis for a statistical assessment of the freeze-thaw durability of cement-based materials.

AB - The distribution of paste-void spacing in cement-based materials is an important feature related to the freeze-thaw durability of these materials, but its reliable estimation remains an unresolved problem. Herein, we evaluate the capability of X-ray computed tomography (CT) for reliable quantification of the distribution of paste-void spacing. Using X-ray CT images of three mortar specimens having different air-entrainment characteristics, we calculate the distributions of paste-void spacing of the specimens by applying previously suggested methods for deriving the exact spacing of air-void systems. This methodology is assessed by comparing the 95th percentile of the cumulative distribution function of the paste-void spacing with spacing factors computed by applying the linear-traverse method to 3D air-void system and reconstructing equivalent air-void distribution in 3D. Results show that the distributions of equivalent void diameter and paste-void spacing follow lognormal and normal distributions, respectively, and the ratios between the 95th percentile paste-void spacing value and the spacing factors reside within the ranges reported by previous numerical studies. This experimental finding indicates that the distribution of paste-void spacing quantified using X-ray CT has the potential to be the basis for a statistical assessment of the freeze-thaw durability of cement-based materials.

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Quantifying the distribution of paste-void spacing of hardened cement paste using X-ray computed tomography

Abstract

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All Science Journal Classification (ASJC) codes

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