Title: Air Void Parameters in Fresh and Hardened Concrete from Pumping

Author(s): Justin Becker, M. Tyler Ley, Daniel Cook

Publication: Materials Journal

Volume:

Issue:

Appears on pages(s):

Keywords: air entrainment; air void system; freeze-thaw resistance; pumping concrete; super air meter (SAM), SAM number

DOI: 10.14359/51740774

Date: 5/1/2024

Abstract:
Pumping of air-entrained concrete can result in a variable of air content, which leads to possibly rejected concrete. This research used air volume, SAM Number (AASHTO T395), Bulk Freeze-Thaw (ASTM C666), and Hardened Air Void Analysis (ASTM C457) to investigate the air void quality and freeze-thaw durability performance of concrete before and after pumping. The laboratory results show the fresh air testing measurements after pumping fresh concrete are not accurate indicators of the freeze-thaw resistance based on the hardened air void analysis. However, testing fresh concrete prior to pumping is a better indicator of the freeze-thaw performance.