Study of gypsum composites with fine solid aggregates at elevated temperatures
The structure and behaviour of two gypsum composites after exposition to elevated temperatures were investigated. The silica sand and fine basalt aggregate were used as solid fillers. The changes in structure and composition at temperatures from 50 to 1,000°C were investigated by scanning electron m...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2021-05-01
|
| Series: | Science and Engineering of Composite Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/secm-2021-0025 |
| _version_ | 1819000870417727488 |
|---|---|
| author | Doleželová Magdaléna Scheinherrová Lenka Vimmrová Alena |
| author_facet | Doleželová Magdaléna Scheinherrová Lenka Vimmrová Alena |
| author_sort | Doleželová Magdaléna |
| collection | DOAJ |
| description | The structure and behaviour of two gypsum composites after exposition to elevated temperatures were investigated. The silica sand and fine basalt aggregate were used as solid fillers. The changes in structure and composition at temperatures from 50 to 1,000°C were investigated by scanning electron microscopy and X-ray diffraction together with the size and strength of the samples and their pore size distribution. The structure of gypsum matrix changed significantly at 1,000°C in both composites, while the aggregate particles were not changed. It was found that even if the silica sand is considered as less suitable filler at high temperatures because of its volume changes, the gypsum with sand performed better than gypsum with basalt at the highest temperatures, because the shrinkage of the gypsum matrix was compensated by the increase in the volume of aggregate. The final volume change at 1,000°C was 3.5% in composite with silica sand and 6.8% in composite with basalt. The residual compressive strength of both composites was about 9.4%. No cracks appeared in the samples and no spalling was observed. |
| first_indexed | 2024-12-20T22:40:11Z |
| format | Article |
| id | doaj.art-1ea1ce92bef04cd7a5556a455afcd9eb |
| institution | Directory Open Access Journal |
| issn | 2191-0359 |
| language | English |
| last_indexed | 2024-12-20T22:40:11Z |
| publishDate | 2021-05-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Science and Engineering of Composite Materials |
| spelling | doaj.art-1ea1ce92bef04cd7a5556a455afcd9eb2022-12-21T19:24:29ZengDe GruyterScience and Engineering of Composite Materials2191-03592021-05-0128123724810.1515/secm-2021-0025Study of gypsum composites with fine solid aggregates at elevated temperaturesDoleželová Magdaléna0Scheinherrová Lenka1Vimmrová Alena2Department of Material Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thakurova 7, 166 29 Prague 6, Czech RepublicDepartment of Material Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thakurova 7, 166 29 Prague 6, Czech RepublicDepartment of Material Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thakurova 7, 166 29 Prague 6, Czech RepublicThe structure and behaviour of two gypsum composites after exposition to elevated temperatures were investigated. The silica sand and fine basalt aggregate were used as solid fillers. The changes in structure and composition at temperatures from 50 to 1,000°C were investigated by scanning electron microscopy and X-ray diffraction together with the size and strength of the samples and their pore size distribution. The structure of gypsum matrix changed significantly at 1,000°C in both composites, while the aggregate particles were not changed. It was found that even if the silica sand is considered as less suitable filler at high temperatures because of its volume changes, the gypsum with sand performed better than gypsum with basalt at the highest temperatures, because the shrinkage of the gypsum matrix was compensated by the increase in the volume of aggregate. The final volume change at 1,000°C was 3.5% in composite with silica sand and 6.8% in composite with basalt. The residual compressive strength of both composites was about 9.4%. No cracks appeared in the samples and no spalling was observed.https://doi.org/10.1515/secm-2021-0025gypsum compositeelevated temperaturesmicrostructureporosityproperties |
| spellingShingle | Doleželová Magdaléna Scheinherrová Lenka Vimmrová Alena Study of gypsum composites with fine solid aggregates at elevated temperatures Science and Engineering of Composite Materials gypsum composite elevated temperatures microstructure porosity properties |
| title | Study of gypsum composites with fine solid aggregates at elevated temperatures |
| title_full | Study of gypsum composites with fine solid aggregates at elevated temperatures |
| title_fullStr | Study of gypsum composites with fine solid aggregates at elevated temperatures |
| title_full_unstemmed | Study of gypsum composites with fine solid aggregates at elevated temperatures |
| title_short | Study of gypsum composites with fine solid aggregates at elevated temperatures |
| title_sort | study of gypsum composites with fine solid aggregates at elevated temperatures |
| topic | gypsum composite elevated temperatures microstructure porosity properties |
| url | https://doi.org/10.1515/secm-2021-0025 |
| work_keys_str_mv | AT dolezelovamagdalena studyofgypsumcompositeswithfinesolidaggregatesatelevatedtemperatures AT scheinherrovalenka studyofgypsumcompositeswithfinesolidaggregatesatelevatedtemperatures AT vimmrovaalena studyofgypsumcompositeswithfinesolidaggregatesatelevatedtemperatures |