The Problem Clinic item on page 232 of the April 1977 issue says that Portland Cement Association made a mix with 11.4-percent air content and a slump of 8.5 inches to get the mix to flow easily into forms and make it easy to consolidate. Couldn't we do the same thing with one of the new superplasticizers?
Yes. Large increases in workability are obtained with superplasticizers. Their use for exactly this purpose is being advocated. For the amount of change in workability and the length of time that the mix would retain this high workability it would be best to consult the admixture manufacturer.