Investigation into Freezing-Thawing Durability of Low-Permeability Concrete with and without Air Entraining Agent Final Report June 2009 Sponsored by Iowa Concrete Paving Association Iowa Department of Transportation
Investigation into Freezing-Thawing Durability of Low-Permeability Concrete with and without Air Entraining Agent
May 09, 2023
The aim of the present study is to investigate the effect of low-permeability concrete, made with reduced water‐to‐binder ratios (w/b)
and/or supplementary cementitious materials (SCMs), on the need for air entrainment to achieve freezing‐thawing (F‐T) durability.
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In the present study, concrete mixes were made with different types of cement (Types I and IP), with or without fly ash replacement
(15%), with different water‐to‐binder ratios (w/b =0.25, 0.35, 0.45 and 0.55), and with or without air entraining agent (AEA). All
concrete mixtures were controlled to have a similar slump by using different dosages of superplasticizer. The rapid chloride
permeability and F-T durability of the concrete samples were determined according to ASTM C1202 and ASTM C666A, respectively.
The air void structure of the concrete was studied using the Air Void Analyzer, RapidAir, and porosity tests (ASTM C642). In addition,
the general concrete properties, such as slump, air content, unit weight, and 28‐day compressive strength, were evaluate d.
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