Title:
Air-Void Parameters in Fresh and Hardened Concrete from Pumping
Author(s):
Justin Becker, M. Tyler Ley, and Daniel Cook
Publication:
Materials Journal
Volume:
121
Issue:
4
Appears on pages(s):
27-36
Keywords:
air entrainment; air-void system; freezing-and-thawing resistance; pumping concrete; super air meter (SAM); SAM number
DOI:
10.14359/51740774
Date:
8/1/2024
Abstract:
Pumping of air-entrained concrete can result in variable air
content, which leads to possibly rejected concrete. This research
used air volume, super air meter (SAM) number (AASHTO T 395),
bulk freezing and thawing (ASTM C666/C666M), and hardened
air-void analysis (ASTM C457/C457M) to investigate the
air-void quality and freezing-and-thawing durability performance
of concrete before and after pumping. The laboratory results
show that the fresh-air testing measurements after pumping fresh
concrete are not accurate indicators of the freezing-and-thawing
resistance based on the hardened air-void analysis. However,
testing fresh concrete prior to pumping is a better indicator of the
freezing-and-thawing performance.
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