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Estimating the 95th Percentile of the Paste-Void Spacing Distribution in Hardened Cement Paste Containing Air Entrainment

Published

Author(s)

Kenneth A. Snyder

Abstract

The spacing equations of Powers, Philleo, and Pleau and Pigeon are used to estimate the uniform thickness of paste surrounding entrained air voids that is required to encompass 95 % of the air-paste system. Spacing equation accuracy is determined by comparison to the numerically exact result of Lu and Torquato. The air void system is approximated by spheres with radii from a lognormal distribution. For the systems studied here, both the Philleo and the Pleau and Pigeon equations are accurate to within approximately 10 %. The Powers spacing factor can be used to estimate the same quantity to within a factor of two, and could be made far more accurate by adjusting the result using the variance in the air void radius distribution.
Proceedings Title
International RILEM Workshop on Frost Damage in Concrete (PRO 25)
Conference Dates
June 28-30, 1999
Conference Title
International RILEM Workshop

Keywords

air-void spacing, air-void system, building technology, concrete, freeze-thaw, spacing equations

Citation

Snyder, K. (1999), Estimating the 95th Percentile of the Paste-Void Spacing Distribution in Hardened Cement Paste Containing Air Entrainment, International RILEM Workshop on Frost Damage in Concrete (PRO 25), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860172 (Accessed June 23, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created June 1, 1999, Updated June 2, 2021