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Kim, Jae Hong
Research Group for Concrete Structures and Materials
Research Interests
  • Mechanics of Concrete, Rheology, Structural Analysis, Construction Performance

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Air voids size distribution determined by ultrasonic attenuation

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Title
Air voids size distribution determined by ultrasonic attenuation
Author
Yim, Hong JaeKim, Jae HongLee, Bang YeonKwak, Hyo-Gyoung
Keywords
Air voids; Application examples; Cement based material; Cement paste; Material property; Theoretical models; Three-dimensional information; Ultrasonic attenuation
Issue Date
201310
Publisher
ELSEVIER SCI LTD
Citation
CONSTRUCTION AND BUILDING MATERIALS, v.47, no., pp.502 - 510
Abstract
Voids in cement-based materials influence their material properties. While air voids within a certain range are beneficial for freezing-and-thawing resistance, large-size voids decreases strength and durability. This paper proposes a method to quantify the air voids size distribution, which use the concept of ultrasonic wave attenuation. The wave attenuation increases with the inclusion of air voids. Its measurement is compared with a theoretical model, and then three-dimensional information of air voids can be obtained. An application example of cement paste is presented and the results are discussed with the measurement of permeable pores and the result of a microscopical determination.
URI
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DOI
http://dx.doi.org/10.1016/j.conbuildmat.2013.05.070
ISSN
0950-0618
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