SYMPOSIA PAPER Published: 01 January 1960

Water-Reducing Admixtures and Set-Retarding Ad-Mixtures for Concrete: Uses; Specifications; Research Objectives


When properly selected and proportioned, water-reducing admixtures and set-retarding admixtures (1) permit control of certain properties of fresh or hardened concrete, (2) aid in producing concrete meeting requirements of specifications when plain air-entrained concrete will not meet these requirements, (3) decrease costs of concrete and of concreting operations, and (4) permit use of design and construction practices not otherwise feasible.

Water-reducing admixtures and set-retarding admixtures should be purchased under specifications which assure uniformity, development in concrete of satisfactory qualities for the intended use, and freedom from deleterious qualities which may adversely affect significant properties of the concrete.

Major producers of these admixtures are engaged actively in basic and developmental research to improve their performance and expand their application.

Author Information

Mielenz, RC
The Muster Builders Co., Division of American-Marietta Co., Cleveand, Ohio
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Developed by Committee: C09
Pages: 218–239
DOI: 10.1520/STP39578S
ISBN-EB: 978-0-8031-5648-7
ISBN-13: 978-0-8031-5647-0