Title:
Something For Nothing -Almost
Author(s):
Paul Klieger
Publication:
Concrete International
Volume:
2
Issue:
1
Appears on pages(s):
15-23
Keywords:
air-entrained concretes; air-entraining
agents' concrete construction; freeze-thaw durability;
mix proportioning; tests.
DOI:
Date:
1/1/1980
Abstract:
Traces the history of air entrainment in concrete, the development of concepts relative to the characteristics of the air void system, and how air entrain-ment enhances the resistance of concrete to freezing and thawing. Describes the development of test methods to determine not only the volume of entrained air but also the size and distribution of the air voids. Discusses the field performance of air entrained concrete over the past 30 to 40 years and the recent incidence of poorer performance. Suggests three broad courses of action to resolve the reasons for such recent poorer performance. [Author]