Title:
Volume Fraction of Protected Paste and Mean Spacing of Air Voids
Author(s):
Emmanuel K. Attiogbe
Publication:
Materials Journal
Volume:
94
Issue:
6
Appears on pages(s):
588-591
Keywords:
air entrainment; durability; freeze thaw durability; pastes
DOI:
10.14359/343
Date:
11/1/1997
Abstract:
The size distribution and number of air voids are important characteristics that affect the air-void system required to insure a durable concrete under repeated cycles of freezing and thawing. The standard spacing factor does not account for the size distribution of the air voids. The F parameter of the mean spacing model, i.e., the V. fraction of potentially protected paste, is shown to account for the air void size distribution. The study also indicates that the gamma distribution is more suitable than the zeroth-order logarithmic distribution for representing air-void diameter and chord length distributions.