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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. - Highlights: Black-Right-Pointing-Pointer The paste-void spacing inmore » 3D can be quantified by X-ray CT. Black-Right-Pointing-Pointer The distribution of the paste-void spacing follows normal distribution. Black-Right-Pointing-Pointer The spacing factor and 95th percentile of CDF of paste-void spacing are correlated.« less

Authors:
 [1];  [2];  [3];  [1]
  1. School of Civil and Environmental Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749 (Korea, Republic of)
  2. Korea Institute of Construction Technology, 283 Goyangdae-ro, Ilsanseo-gu, Goyang, 411-712 (Korea, Republic of)
  3. Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305 (United States)
Publication Date:
OSTI Identifier:
22163153
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 73; Journal Issue: Complete; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CAT SCANNING; CEMENTS; DISTRIBUTION; DISTRIBUTION FUNCTIONS; VOIDS; X RADIATION

Citation Formats

Yun, Tae Sup, E-mail: taesup@yonsei.ac.kr, Kim, Kwang Yeom, E-mail: kimky@kict.re.kr, Choo, Jinhyun, E-mail: jinhyun@stanford.edu, and Kang, Dong Hun, E-mail: timeriver@naver.com. Quantifying the distribution of paste-void spacing of hardened cement paste using X-ray computed tomography. United States: N. p., 2012. Web. doi:10.1016/J.MATCHAR.2012.08.008.
Yun, Tae Sup, E-mail: taesup@yonsei.ac.kr, Kim, Kwang Yeom, E-mail: kimky@kict.re.kr, Choo, Jinhyun, E-mail: jinhyun@stanford.edu, & Kang, Dong Hun, E-mail: timeriver@naver.com. Quantifying the distribution of paste-void spacing of hardened cement paste using X-ray computed tomography. United States. doi:10.1016/J.MATCHAR.2012.08.008.
Yun, Tae Sup, E-mail: taesup@yonsei.ac.kr, Kim, Kwang Yeom, E-mail: kimky@kict.re.kr, Choo, Jinhyun, E-mail: jinhyun@stanford.edu, and Kang, Dong Hun, E-mail: timeriver@naver.com. Thu . "Quantifying the distribution of paste-void spacing of hardened cement paste using X-ray computed tomography". United States. doi:10.1016/J.MATCHAR.2012.08.008.
@article{osti_22163153,
title = {Quantifying the distribution of paste-void spacing of hardened cement paste using X-ray computed tomography},
author = {Yun, Tae Sup, E-mail: taesup@yonsei.ac.kr and Kim, Kwang Yeom, E-mail: kimky@kict.re.kr and Choo, Jinhyun, E-mail: jinhyun@stanford.edu and Kang, Dong Hun, E-mail: timeriver@naver.com},
abstractNote = {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. - Highlights: Black-Right-Pointing-Pointer The paste-void spacing in 3D can be quantified by X-ray CT. Black-Right-Pointing-Pointer The distribution of the paste-void spacing follows normal distribution. Black-Right-Pointing-Pointer The spacing factor and 95th percentile of CDF of paste-void spacing are correlated.},
doi = {10.1016/J.MATCHAR.2012.08.008},
journal = {Materials Characterization},
issn = {1044-5803},
number = Complete,
volume = 73,
place = {United States},
year = {2012},
month = {11}
}