Physicochemical Characterization of a Hydrated Calcium Silicate Board Material

Abstract

A hydrated calcium silicate insulation board was one of three construction materials used in the round-robin study of hygric properties carried out in the HAMSTAD project (Roels, S., Carmeliet, J., Hens, H., Adan, O., Brocken, H., Cerny, R., Pavlik, Z., Hall, C., Kumaran, K., Pel, L. and Plagge, R. (2004). Interlaboratory Comparison of Hygric Properties of Porous Building Materials, Journal of Thermal Envelope and Building Science, 27: 307-325). We report here the results of a physicochemical examination of this material. Analysis by synchrotron X-ray diffraction and nuclear magnetic resonance show that the mineralogical composition is essentially pure xonotlite. Bulk density and pore size distribution were obtained by mercury intrusion porosimetry and helium pycnometry; microstructural fabric was observed by high and low resolution electron microscopy; and organic content measured by Carbon-Hydrogen-Nitrogen (CHN) chemical analysis.

Keywords

calcium silicate xonotlite

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