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Title: Direct observation of void evolution during cement hydration

Abstract

This study follows the hydration of both portland cement and tricalcium silicate pastes between 30 min and 16 h of hydration. In-situ fast X-ray Computed Tomography (fCT) was used to make direct observations of the air-filled void formation in w/s of 0.40 to 0.70 with a micron resolution. The results show that over the first hour of the acceleration period the volume of air-filled voids reaches a maximum value and then decreases during the acceleration period and stays constant. The void distribution changes from a few coarse voids to a large number of smaller and more uniformly distributed voids. This behavior is suggested to be controlled by changes in the ionic strength that cause exsolution of dissolved air from the pore solution.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [2];  [3];  [4];  [4]
  1. Oklahoma State Univ., Stillwater, OK (United States)
  2. Oklahoma State Univ., Tulsa, OK (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Princeton Univ., Princeton, NJ (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); U.S. Department of Transportation - Federal Highway Administration
OSTI Identifier:
1436466
Alternate Identifier(s):
OSTI ID: 1692097
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Materials & Design
Additional Journal Information:
Journal Volume: 136; Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Calorimetry; Cement hydration; Exsolution; Induction period; Void evolution; X-ray computed tomography

Citation Formats

Moradian, Masoud, Hu, Qinang, Aboustait, Mohammed, Ley, M. Tyler, Hanan, Jay C., Xiao, Xianghui, Scherer, George W., and Zhang, Zhidong. Direct observation of void evolution during cement hydration. United States: N. p., 2017. Web. https://doi.org/10.1016/j.matdes.2017.09.056.
Moradian, Masoud, Hu, Qinang, Aboustait, Mohammed, Ley, M. Tyler, Hanan, Jay C., Xiao, Xianghui, Scherer, George W., & Zhang, Zhidong. Direct observation of void evolution during cement hydration. United States. https://doi.org/10.1016/j.matdes.2017.09.056
Moradian, Masoud, Hu, Qinang, Aboustait, Mohammed, Ley, M. Tyler, Hanan, Jay C., Xiao, Xianghui, Scherer, George W., and Zhang, Zhidong. Thu . "Direct observation of void evolution during cement hydration". United States. https://doi.org/10.1016/j.matdes.2017.09.056. https://www.osti.gov/servlets/purl/1436466.
@article{osti_1436466,
title = {Direct observation of void evolution during cement hydration},
author = {Moradian, Masoud and Hu, Qinang and Aboustait, Mohammed and Ley, M. Tyler and Hanan, Jay C. and Xiao, Xianghui and Scherer, George W. and Zhang, Zhidong},
abstractNote = {This study follows the hydration of both portland cement and tricalcium silicate pastes between 30 min and 16 h of hydration. In-situ fast X-ray Computed Tomography (fCT) was used to make direct observations of the air-filled void formation in w/s of 0.40 to 0.70 with a micron resolution. The results show that over the first hour of the acceleration period the volume of air-filled voids reaches a maximum value and then decreases during the acceleration period and stays constant. The void distribution changes from a few coarse voids to a large number of smaller and more uniformly distributed voids. This behavior is suggested to be controlled by changes in the ionic strength that cause exsolution of dissolved air from the pore solution.},
doi = {10.1016/j.matdes.2017.09.056},
journal = {Materials & Design},
number = C,
volume = 136,
place = {United States},
year = {2017},
month = {9}
}

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Cited by: 9 works
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Works referenced in this record:

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