The Development of Composite Nanostructured Gypsum Binder with Enhanced Heat Resistance Performance

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The subject of this study was an experimental confirmation of stability of composite nanostructured gypsum silicate binder (CNGSB) system under high-temperature exposure (up to 1000 °C). The hypothesis of the heat-resistance performance of gypsum-based binder was crystallization process in CNGSB system involving a silicate constituent as a reactive component in NB. XRD and DTA analyses demonstrated that thermal exposure of CNGSB to wide range of temperatures of 20–1000 °C leads to α-quartz to β-quartz phase transformation in the binder; amorphous alkali-aluminosilicate (gel) changes to crystal phase of Са-albite. The calculation of cell volumes characteristics for low-temperature (before thermal exposure) and high-temperature (after thermal exposure) phases was performed. The calculated ratios of unit cell volumes were close to 1 which ensures a structural stability of the GNB under thermal exposure and confirms its heat-resistant performance.

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Dr. Denis Solovev

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293-298

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A. V. Cherevatova et al., "The Development of Composite Nanostructured Gypsum Binder with Enhanced Heat Resistance Performance", Materials Science Forum, Vol. 945, pp. 293-298, 2019

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February 2019

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