Study of Gypsum Samples with Additions of Mineral Particles
The DSC method revealed endothermic effects (–613.9 J/g) during gypsum dihydrate heating associated with the heat absorption during the release of crystalline hydrate water in the range of 100–250°C during the heating process. Mass losses during water evaporation were determined by TGA and amount of...
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creator | Blaznov, A. N. Vereshchagin, P. V. Zadvornykh, G. S. Sakoshev, E. G. Chashchilov, D. V. Sakoshev, Z. G. Firsov, V. V. Bychin, N. V. |
description | The DSC method revealed endothermic effects (–613.9 J/g) during gypsum dihydrate heating associated with the heat absorption during the release of crystalline hydrate water in the range of 100–250°C during the heating process. Mass losses during water evaporation were determined by TGA and amount of up to 20%. The thermal conductivity coefficient of gypsum samples is 0.288 W/m K. The influence of mineral additives—glass spheres, wollastonite, and chopped basalt fiber—on changes in the properties of gypsum samples at curing times of 2 h and 1, 3, 7, and 14 days was studied. An addition of glass spheres up to 10 wt % reduces gypsum strength by 10–13% and density, by 16%, additive up to 20 wt % reduces strength by two times and density by 36–40%, and additive up to 50 wt % reduces strength by from five to six times and density by 80–85%, with the thermal conductivity coefficient decreasing to 0.236 W/m K. An addition of wollastonite 10–20 wt % increases the strength of gypsum samples by 13–16%, and addition of 50 wt % reduces the strength by two times. An addition of 0.5–1.5 wt % chopped basalt fibers increases strength by 10–16%, as well as the strength gain rate. Additions of wollastonite and basalt fibers practically do not change the density of gypsum samples, but increase the thermal conductivity coefficient to 0.320–0.373 W/m K. |
doi_str_mv | 10.1134/S1995421224700679 |
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N. ; Vereshchagin, P. V. ; Zadvornykh, G. S. ; Sakoshev, E. G. ; Chashchilov, D. V. ; Sakoshev, Z. G. ; Firsov, V. V. ; Bychin, N. V.</creator><creatorcontrib>Blaznov, A. N. ; Vereshchagin, P. V. ; Zadvornykh, G. S. ; Sakoshev, E. G. ; Chashchilov, D. V. ; Sakoshev, Z. G. ; Firsov, V. V. ; Bychin, N. V.</creatorcontrib><description>The DSC method revealed endothermic effects (–613.9 J/g) during gypsum dihydrate heating associated with the heat absorption during the release of crystalline hydrate water in the range of 100–250°C during the heating process. Mass losses during water evaporation were determined by TGA and amount of up to 20%. The thermal conductivity coefficient of gypsum samples is 0.288 W/m K. The influence of mineral additives—glass spheres, wollastonite, and chopped basalt fiber—on changes in the properties of gypsum samples at curing times of 2 h and 1, 3, 7, and 14 days was studied. An addition of glass spheres up to 10 wt % reduces gypsum strength by 10–13% and density, by 16%, additive up to 20 wt % reduces strength by two times and density by 36–40%, and additive up to 50 wt % reduces strength by from five to six times and density by 80–85%, with the thermal conductivity coefficient decreasing to 0.236 W/m K. An addition of wollastonite 10–20 wt % increases the strength of gypsum samples by 13–16%, and addition of 50 wt % reduces the strength by two times. An addition of 0.5–1.5 wt % chopped basalt fibers increases strength by 10–16%, as well as the strength gain rate. 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V.</creatorcontrib><creatorcontrib>Sakoshev, Z. G.</creatorcontrib><creatorcontrib>Firsov, V. V.</creatorcontrib><creatorcontrib>Bychin, N. V.</creatorcontrib><title>Study of Gypsum Samples with Additions of Mineral Particles</title><title>Polymer science. Series D, Glues and sealing materials</title><addtitle>Polym. Sci. Ser. D</addtitle><description>The DSC method revealed endothermic effects (–613.9 J/g) during gypsum dihydrate heating associated with the heat absorption during the release of crystalline hydrate water in the range of 100–250°C during the heating process. Mass losses during water evaporation were determined by TGA and amount of up to 20%. The thermal conductivity coefficient of gypsum samples is 0.288 W/m K. The influence of mineral additives—glass spheres, wollastonite, and chopped basalt fiber—on changes in the properties of gypsum samples at curing times of 2 h and 1, 3, 7, and 14 days was studied. An addition of glass spheres up to 10 wt % reduces gypsum strength by 10–13% and density, by 16%, additive up to 20 wt % reduces strength by two times and density by 36–40%, and additive up to 50 wt % reduces strength by from five to six times and density by 80–85%, with the thermal conductivity coefficient decreasing to 0.236 W/m K. An addition of wollastonite 10–20 wt % increases the strength of gypsum samples by 13–16%, and addition of 50 wt % reduces the strength by two times. An addition of 0.5–1.5 wt % chopped basalt fibers increases strength by 10–16%, as well as the strength gain rate. Additions of wollastonite and basalt fibers practically do not change the density of gypsum samples, but increase the thermal conductivity coefficient to 0.320–0.373 W/m K.</description><subject>Basalt</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Coefficients</subject><subject>Density</subject><subject>Gypsum</subject><subject>Heat conductivity</subject><subject>Heat transfer</subject><subject>Heating</subject><subject>Polymer Sciences</subject><subject>Thermal conductivity</subject><subject>Wollastonite</subject><issn>1995-4212</issn><issn>1995-4220</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNpl0E1Lw0AQBuBFFKzVH-BtwXN0Zz-SDJ5K0SpUFNJ72K9oSprE3QTpvzelogdPMwwP78BLyDWwWwAh7wpAVJID5zJjLM3whMwOp0Ryzk5_d-Dn5CLG7UQ4qGxG7othdHvaVXS17-O4o4Xe9Y2P9KsePujCuXqouzYewEvd-qAb-qbDUNvJXJKzSjfRX_3MOdk8PmyWT8n6dfW8XKyTPgNMNHMpFywVDlEiMyLLK6sym3vjhDUOwTJEh05r44xSBixUFqXXAj33IObk5hjbh-5z9HEot90Y2uljOcXmUipgbFL8qGIf6vbdhz8FrDx0VP7rSHwDGtFY3g</recordid><startdate>2024</startdate><enddate>2024</enddate><creator>Blaznov, A. 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D</stitle><date>2024</date><risdate>2024</risdate><volume>17</volume><issue>2</issue><spage>402</spage><epage>406</epage><pages>402-406</pages><issn>1995-4212</issn><eissn>1995-4220</eissn><abstract>The DSC method revealed endothermic effects (–613.9 J/g) during gypsum dihydrate heating associated with the heat absorption during the release of crystalline hydrate water in the range of 100–250°C during the heating process. Mass losses during water evaporation were determined by TGA and amount of up to 20%. The thermal conductivity coefficient of gypsum samples is 0.288 W/m K. The influence of mineral additives—glass spheres, wollastonite, and chopped basalt fiber—on changes in the properties of gypsum samples at curing times of 2 h and 1, 3, 7, and 14 days was studied. An addition of glass spheres up to 10 wt % reduces gypsum strength by 10–13% and density, by 16%, additive up to 20 wt % reduces strength by two times and density by 36–40%, and additive up to 50 wt % reduces strength by from five to six times and density by 80–85%, with the thermal conductivity coefficient decreasing to 0.236 W/m K. An addition of wollastonite 10–20 wt % increases the strength of gypsum samples by 13–16%, and addition of 50 wt % reduces the strength by two times. An addition of 0.5–1.5 wt % chopped basalt fibers increases strength by 10–16%, as well as the strength gain rate. Additions of wollastonite and basalt fibers practically do not change the density of gypsum samples, but increase the thermal conductivity coefficient to 0.320–0.373 W/m K.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S1995421224700679</doi><tpages>5</tpages></addata></record> |
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subjects | Basalt Chemistry Chemistry and Materials Science Coefficients Density Gypsum Heat conductivity Heat transfer Heating Polymer Sciences Thermal conductivity Wollastonite |
title | Study of Gypsum Samples with Additions of Mineral Particles |
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