Correlation of Slag Cement Composition with Durability of Portland Cement-Slag Concrete [Summary]
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2022-04-01
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Abstract:Field observations of some concrete structures have raised concerns about Florida Department of Transportation (FDOT) specifications for slag in cement mixes. In this project, researchers addressed the effect of slag composition on temperature rise of setting concrete that can lead to cracking and sulfate content that can reduce durability. To investigate the FDOT specifications, cements and slags selected for the project extended beyond those typically used by FDOT, representing a wide range of chemical compositions and fineness of powder samples. Slags varied in alumina content, magnesia-to-alumina ratio, sulfate levels, and fineness. Cements were made with the slags using 60% by mass of slag per FDOT specification.
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