Characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques
The effectiveness of advanced ultrasonic techniques to quantitatively characterize the capillary porosity and entrained air content in hardened cement paste is examined. Direct measurements of ultrasonic attenuation are used to measure the volume fraction and average size of entrained air voids and...
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th-mahidol.244542018-08-24T08:56:18Z Characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques Wonsiri Punurai Jacek Jarzynski Jianmin Qu Jin Yeon Kim Laurence J. Jacobs Kimberly E. Kurtis Georgia Institute of Technology Mahidol University The George W. Woodruff School of Mechanical Engineering Engineering Materials Science The effectiveness of advanced ultrasonic techniques to quantitatively characterize the capillary porosity and entrained air content in hardened cement paste is examined. Direct measurements of ultrasonic attenuation are used to measure the volume fraction and average size of entrained air voids and to assess variations in intrinsic porosity - as influenced by water-to-cement ratio (w/c) - in hardened cement paste samples. For the air entrained specimens, an inversion procedure based on a theoretical attenuation model is used to predict the average size and volume fraction of entrained air voids in each specimen, producing results in very good agreement with results obtained by standard petrographic methods and by gravimetric analysis. In addition, ultrasonic attenuation measurements are related to w/c to quantify the relationship between increasing porosity (with increasing w/c) and ultrasonic wave characteristics. © 2006 Elsevier Ltd. All rights reserved. 2018-08-24T01:49:53Z 2018-08-24T01:49:53Z 2007-01-01 Article Cement and Concrete Research. Vol.37, No.1 (2007), 38-46 10.1016/j.cemconres.2006.09.016 00088846 2-s2.0-33751523833 https://repository.li.mahidol.ac.th/handle/123456789/24454 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33751523833&origin=inward |
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Engineering Materials Science Wonsiri Punurai Jacek Jarzynski Jianmin Qu Jin Yeon Kim Laurence J. Jacobs Kimberly E. Kurtis Characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques |
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The effectiveness of advanced ultrasonic techniques to quantitatively characterize the capillary porosity and entrained air content in hardened cement paste is examined. Direct measurements of ultrasonic attenuation are used to measure the volume fraction and average size of entrained air voids and to assess variations in intrinsic porosity - as influenced by water-to-cement ratio (w/c) - in hardened cement paste samples. For the air entrained specimens, an inversion procedure based on a theoretical attenuation model is used to predict the average size and volume fraction of entrained air voids in each specimen, producing results in very good agreement with results obtained by standard petrographic methods and by gravimetric analysis. In addition, ultrasonic attenuation measurements are related to w/c to quantify the relationship between increasing porosity (with increasing w/c) and ultrasonic wave characteristics. © 2006 Elsevier Ltd. All rights reserved. |
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Georgia Institute of Technology |
author_facet |
Georgia Institute of Technology Wonsiri Punurai Jacek Jarzynski Jianmin Qu Jin Yeon Kim Laurence J. Jacobs Kimberly E. Kurtis |
format |
Article |
author |
Wonsiri Punurai Jacek Jarzynski Jianmin Qu Jin Yeon Kim Laurence J. Jacobs Kimberly E. Kurtis |
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Wonsiri Punurai |
title |
Characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques |
title_short |
Characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques |
title_full |
Characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques |
title_fullStr |
Characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques |
title_full_unstemmed |
Characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques |
title_sort |
characterization of multi-scale porosity in cement paste by advanced ultrasonic techniques |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/24454 |
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1763493934104838144 |