Physicochemical Characterization of a Hydrated Calcium Silicate Board Material

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.

[1]  Wieslawa NocuO-Wczelik,et al.  Effect of Na and Al on the phase composition and morphology of autoclaved calcium silicate hydrates , 1999 .

[2]  X. Cong,et al.  17O MAS NMR Investigation of the Structure of Calcium Silicate Hydrate Gel , 1996 .

[3]  John Bensted,et al.  Structure and Performance of Cements , 2001 .

[4]  S. Shaw,et al.  Hydrothermal formation of the calcium silicate hydrates, tobermorite (Ca5Si6O16(OH)2·4H2O) and xonotlite (Ca6Si6O17(OH)2): an in situ synchrotron study , 2000 .

[5]  Yoshio Adachi,et al.  29Si and 1H NMR of natural and synthetic xonotlite , 1998 .

[6]  Andrew C. Jupe,et al.  Rapid whole-rock mineral analysis and composition mapping by synchrotron X-ray diffraction , 1996 .

[7]  T. Armbruster,et al.  Polytypism in xonotlite Ca6Si6O17(OH)2 , 2001 .

[8]  J. Carmeliet,et al.  Interlaboratory Comparison of Hygric Properties of Porous Building Materials , 2004 .

[9]  X. Cong,et al.  29Si and 17O NMR investigation of the structure of some crystalline calcium silicate hydrates , 1996 .

[10]  Olga Koronthalyova,et al.  THERMOPHYSICAL PARAMETERS OF CALCIUM SILICATE INSULATION MEASURED BY GUARDED HOT PLATE AND PULSE TRANSIENT METHODS , 2004 .

[11]  Andrew C. Jupe,et al.  Non-destructive tomographic energy-dispersive diffraction imaging of the interior of bulk concrete , 2000 .

[12]  W. D. Hoff,et al.  Water Transport in Brick, Stone and Concrete , 2002 .

[13]  Olga Koronthalyova,et al.  Thermal Conductivity of Fibre Reinforced Porous Calcium Silicate Hydrate-based Composites , 2003 .

[14]  É. Lippmaa,et al.  Structural studies of silicates by solid-state high-resolution silicon-29 NMR , 1980 .

[15]  J. Bensted,et al.  Study of calcium silicate hydrates by solid state high resolution 29 Si nuclear magnetic resonance , 1990 .