Title:
Origin, Evolution, and Effects of
the Air Void System in Concrete
Part 4-The Air Void System in Job Concrete*
Author(s):
Richard C. Mielenz, Vladimir E. Wolkodoff,
James E. Backstrom, and Richard W. Burrows **
Publication:
Journal Proceedings
Volume:
55
Issue:
10
Appears on pages(s):
507-517
Keywords:
no keywords
DOI:
10.14359/11371
Date:
10/1/1958
Abstract:
The air void system observed in concrete from engineering structures is comparable to that observed in concrete specimens prepared in the laboratory. The void system in non-air-entrained concrete varies widely, the observed specific surface ranging from 107 to 1111 in. In air-entrained concrete, the observed specific surface ranges from 615 to 1600 in. and the spacing factor ranges from 0.0023 to 0.0081 in. The results of the examination indicate that a satisfactory air void system in job concrete is assured if the recommendations of ACI 613-54 are followed. Methods for microscopical measurement of the air void system in hardened concrete are described in an appendix to Part 4.