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High-Temperature Processing and Applications of Silica-Modified Portland Cement CBC Composites

Published online by Cambridge University Press:  21 February 2011

Sean Wise  and
R. Kevan
Sean Wise
Affiliation:
CEMCOM Corporation/CBC Products Group, Occidental Chemical Corporation
R. Kevan
Affiliation:
CEMCOM Corporation/CBC Products Group, Occidental Chemical Corporation
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Abstract

Silica-modified portland cement-based Chemically Bonded Composites (CBCs) have been prepared and cured to elevated temperatures. It has been found that when cementitious composites with calcium-to-silica (C/S) ratios of 0.83 are thoroughly hydrated through hydrothermal curing, followed by careful dehydration, mortars of exceptional strength are produced. The bulk of this strength is maintained to over 600°C. X-ray diffraction studies of binder samples dried at 200°C and 500°C show only slight differences in mineral product contents. Above 600°C, a drop in strength is noted, and a substantial portion of the binder converts to wollastonite. Even so, these CBC composites retain as much as 40% of their peak compressive strength to temperatures up to 800°C. Applications of these materials in high-temperature industrial processes are presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 179: Symposium Y – Specialty Cements with Advanced Properties , 1989 , 89
Copyright
Copyright © Materials Research Society 1991

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