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Stereological and Statistical Properties of Entrained Voids in Concrete: A Mathematical Basis for Air Void System Characterization.


pdf icon Stereological and Statistical Properties of Entrained Voids in Concrete: A Mathematical Basis for Air Void System Characterization. (3284 K)
Snyder, K. A.; Natesaiyer, K.; Hover, K.

Materials Science of Concrete VI. Proceedings. American Ceramic Society. December 2001, Mindess, S.; Skalny, J., Editor(s)(s), 129-214 pp, 2001.

Keywords:

concretes; air-void system; air-void spacing

Abstract:

To understand the freeze-thaw properties of hardened concrete, the air void system must be characterized. Studies of the stereological and statistical properties of entrained air voids in concrete have often involved a number of steps: sample preparation and air void identification, linear and planar analyses of a polished surface, uncertainty analysis of the recorded data, parametric and non-parametric estimates of the air void diameter distribution, and analysis of the air void system spatial statistics. Each of these steps has been discussed in detail by a number of engineering fields. For the civil engineering researcher, a comprehensive study of these properties requires consulting many varied texts, each addressing these steps individually. This Chapter attempts to consolidate these topics into a single desk reference. The researcher can then realize the interdependencies of these topics, learn to accurately characterize the air void system microstructure, and develop an understanding of the basis for standardized test methods such as ASTM C 457.