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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Preliminary Study of the Effects of Water-Reducing Retarders on the Strength, Air Void Characteristics, and Durability of Concrete
Author(s): Thomas D. Larson, John L. Mangusi an dRaymond R. Radomski
Publication: Journal Proceedings
Appears on pages(s): 1739-1754
Abstract:Concretes made with water-reducing retarders showed improved freeze-thaw durability, primarily as a result of increased strength. Specimens made from constant slump, constant cement factor mixtures containing several agents at various dosage levels had higher flexural and comressive strengths than control speciments strengths at 7 and Q8 days correlated significantly with durability factor. Microscopic studies indicated that there were minor differences between the air void systems of control and test concretes. In particular, spacing factors increased with retardation. This appeared to result from. ajr.entrainment by the water-reducing retarders and from bubble dissolution.
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