Influence of Measurement Technique on the Air-Void Structure of Hardened Concrete. Discussion by Ken Snyder.
Influence of Measurement Technique on the Air-Void
Structure of Hardened Concrete. Discussion by Ken
Snyder.
(358 K)
Aarre, T.
ACI Materials Journal, Vol. 93, 512-514, 1996.
Keywords:
concretes; air void system; air void spacing; building
technology
Abstract:
The author proposes, and successfully demonstrates, that
the results for air content and specific surface area
(SSA) from an ASTM C 457 linear traverse performed on a
thin section can differ from those performed on a
polished plane section. The difference between thin
section and plane surface air contents was quantified
using a probability theory approach, and
semi-quantiattive arguments were given to explain the
difference for SSA results. However, the tabulated data
suggest further study is needed. The discussion
advances the author's work by addressing a minor error
in the calculation, and by proposing an analytical
approach for estimating the influence of measurement
technique on the measured SSA value.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899