ISSN: 0149-6123
CODEN: CCAGPD
Page Count: 5

Rapid Determination of the Predominant Form of Calcium Sulfate Found in Portland Cement and Its Effect on Premature Stiffening
Buchanan, CE
Vice president of operations, Penn-Dixie Industries, Inc., Pa.

Abstract

The object of this research program was to enable us to predict very rapidly the performance of portland cement in the field in relationship to abnormal setting characteristics. A cement water leach is prepared, and the filtrates are analyzed for calcium and sulfate. A sodium (DI) ethylenediaminetetraacetate acid (EDTA) titration is used for the calcium and a turbidimetric method is used for the sulfate. Based on the results obtained with this chemical procedure, quality control methods that fairly accurately predict whether a cement contains an excessive amount of either anhydrite or plaster of paris have been prepared.

Keywords:
cements, calcium sulfates, portland cements, stiffening

Paper ID: CCA10187J
DOI: 10.1520/CCA10187J
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