Title:
Effect of Delayed Addition of Air-Entraining Admixtures To Concrete
Author(s):
Knut Okkenhaug and Odd E. Gjorv
Publication:
Concrete International
Volume:
14
Issue:
10
Appears on pages(s):
37-41
Keywords:
admixtures; air entrainment; concretes; freeze-thaw resistance; Construction
DOI:
Date:
10/1/1992
Abstract:
To obtain adequate frost resistance, it is necessary to establish an appropriate air-void system in the hardened concrete. Experience indicates that the air-void system in the fresh concrete very often is unstable during transportation and handling. Article presents test results of an experimental study on how the procedure for addition of the various admixtures affects both the air-void characteristics and the stability of the air-void system. This may provide a basis for a better production of frost-resistant concrete.