Influence of different water types on the physical and mechanical properties of gypsum
Aim: To evaluate if gypsum mixed with different water types, with their different compositions influence the dimensional change, surface roughness and compressive strength of type IV and V gypsum specimens. Methods: Sixty specimens were fabricated from metal matrices and divided into six groups (n=1...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Brasil |
| Institución: | Universidade Estadual de Campinas (UNICAMP) |
| Repositorio: | Brazilian journal of oral sciences (Online) |
| Idioma: | portugués |
| OAI Identifier: | oai:ojs.periodicos.sbu.unicamp.br:article/8641288 |
| Acceso en línea: | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641288 |
| Access Level: | acceso abierto |
| Palabra clave: | Calcium sulfate Water Compressive strength Dental prosthesis Odontologia |
| Sumario: | Aim: To evaluate if gypsum mixed with different water types, with their different compositions influence the dimensional change, surface roughness and compressive strength of type IV and V gypsum specimens. Methods: Sixty specimens were fabricated from metal matrices and divided into six groups (n=10) according to the used type of gypsum and water: G1, G2 and G3 – type IV gypsum and tap, mineral and distilled water, respectively; G4, G5 and G6 – type V gypsum and tap, mineral and distilled water, respectively. Water/powder ratio followed the manufacturer’s recommendations (19 mL/100 g) in all groups. The same specimens were used for all tests. A micrometer dial evaluated the dimensional change. The surface roughness of three random points was determined with a rugosimeter; a universal testing machine performed the compressive strength test. The data were subjected to analysis of variance (ANOVA). Results: There was no statistically significant difference (p>0.05) between the three types of water in the studied variables. There was statistically significant difference (p<0.05) between the gypsum mixes for the dimensional change variable. Conclusions: The different water types, with their different compositions, did not influence the analyzed physical and mechanical properties. |
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