Field Performance of Concrete Admixtures





2.0 PROBLEM DESCRIPTION

South Dakota Department of Transportation (SDDOT) field personnel have experienced

concrete performance problems on construction projects. These problems have been identified as rapid slump loss, premature stiffening, and low compressive strengths. As a result, laboratory testing was conducted by the SDDOT Office of Research in 1992. SDDOT Study No. SD92-07 - “

Evaluation of

the Performance of Set Retarders and High-Range Water Reducers in Typical SDDOT Concrete

Mixes” investigated these concrete performance problems by conducting a series of laboratory tests. The conclusion that resulted from this study was that the concrete performance problems experienced by SDDOT field personnel were the result of a compatibility problem between the cement and certain admixtures.


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