Long-Time Study of Cement Performance in Concrete


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Title: Long-Time Study of Cement Performance in Concrete

Author(s): L. S. Brown

Publication: Journal Proceedings

Volume: 44

Issue: 5

Appears on pages(s): 877-924

Keywords: none

Date: 5/1/1948

This paper records the petrographic studies made on the 21 lots of clinker manufactured for the 27 Long-Time Study cements. These studies showed that nine entities were regularly determinable, these being C3S, C2S, C3A, C4AF, free CaO, free MgO, a "dark prismatic" mineral, glass, and a microscopically differentiated complex. Percentages of these mineral phases were measured on polished sections, by means of a Wentworth integrating stage, for each lot of clinker. The cements, are presented in tabular form. The paper also is concerned, on the one hand, with the history and techniques of clinker mineral identifiation and, on the other hand, with correlations between the mineral compositions and various other features or properties of the clinkers and the cements.