Title:
Effects of Air Void Clustering on Concrete Compressive Strength
Author(s):
Jan Vosahlik, Kyle A. Riding, Asad Esmaeily, Randall Billinger, and Heather McLeod
Publication:
Materials Journal
Volume:
113
Issue:
6
Appears on pages(s):
759-767
Keywords:
air void clustering; air void system; chemical admixtures; durability; image analysis
DOI:
10.14359/51689241
Date:
11/1/2016
Abstract:
A total of 65 concrete mixtures were made in a laboratory study to assess the direct relationship of aggregate type or chemical composition of an air-entraining agent to air void clustering in concrete. Concrete retempering was incorporated into the study because it has previously been linked to air void clustering. In addition to compressive strength testing at 7 and 28 days, an automated air void analysis, including a new method of clustering evaluation, was performed. Study results revealed that air void clustering is not responsible for decreased compressive strength of retempered concrete because neither aggregate type nor chemical composition of the air-entraining agent significantly impacted the severity of void clustering. Strength loss was found to correlate with total air and water content rather than air void clustering.
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