Effect of different forms of silica on the physical and mechanical properties of gypsum plaster composites
Gypsum plaster/silica composites prepared by dry blending (0.2-10 %) natural sand, silica fume or silica gel and subsequently hydrated. Their physical and mechanical properties, including normal consistency, setting time, apparent porosity, bulk density and compressive strength, were determined afte...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2013-12-01
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| Series: | Materiales de Construccion |
| Subjects: | |
| Online Access: | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1453 |
| _version_ | 1818612579546693632 |
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| author | A. A. Khalil A. Tawfik A. A. Hegazy M. F. El-Shahat |
| author_facet | A. A. Khalil A. Tawfik A. A. Hegazy M. F. El-Shahat |
| author_sort | A. A. Khalil |
| collection | DOAJ |
| description | Gypsum plaster/silica composites prepared by dry blending (0.2-10 %) natural sand, silica fume or silica gel and subsequently hydrated. Their physical and mechanical properties, including normal consistency, setting time, apparent porosity, bulk density and compressive strength, were determined after hydration for 7- and 28-days. The results indicated that adding different forms of silica lowered the bulk density and increased the normal consistency, setting time, apparent porosity and, to some limited extent, compressive strength of the composites. This improvement in properties can be attributed to the existence of silica in the interstitial pores in the hardened plaster matrices. While most of the composites revealed only scant rises in compressive strength, their composition was beneficial in so far as it included either a readily available low-cost constituent (sand) or industrial by-products. Consequently, the formed plaster-silica composites are of economic value, contribute to a cleaner environment by minimizing waste and can be used for applications where high porosity, lightweight units are required or recommended for low-cost buildings. |
| first_indexed | 2024-12-16T15:48:28Z |
| format | Article |
| id | doaj.art-2b665c08bc0940b0a7a6279961f0d2e0 |
| institution | Directory Open Access Journal |
| issn | 0465-2746 1988-3226 |
| language | English |
| last_indexed | 2024-12-16T15:48:28Z |
| publishDate | 2013-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Materiales de Construccion |
| spelling | doaj.art-2b665c08bc0940b0a7a6279961f0d2e02022-12-21T22:25:44ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262013-12-016331252953710.3989/mc.2013.043121400Effect of different forms of silica on the physical and mechanical properties of gypsum plaster compositesA. A. Khalil0A. Tawfik1A. A. Hegazy2M. F. El-Shahat3National Research CentreNational Research CentreNational Research CentreAim Shams Univ.Gypsum plaster/silica composites prepared by dry blending (0.2-10 %) natural sand, silica fume or silica gel and subsequently hydrated. Their physical and mechanical properties, including normal consistency, setting time, apparent porosity, bulk density and compressive strength, were determined after hydration for 7- and 28-days. The results indicated that adding different forms of silica lowered the bulk density and increased the normal consistency, setting time, apparent porosity and, to some limited extent, compressive strength of the composites. This improvement in properties can be attributed to the existence of silica in the interstitial pores in the hardened plaster matrices. While most of the composites revealed only scant rises in compressive strength, their composition was beneficial in so far as it included either a readily available low-cost constituent (sand) or industrial by-products. Consequently, the formed plaster-silica composites are of economic value, contribute to a cleaner environment by minimizing waste and can be used for applications where high porosity, lightweight units are required or recommended for low-cost buildings.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1453compositesgypsum plastersilicaphysical and mechanical propertiesbuilding units |
| spellingShingle | A. A. Khalil A. Tawfik A. A. Hegazy M. F. El-Shahat Effect of different forms of silica on the physical and mechanical properties of gypsum plaster composites Materiales de Construccion composites gypsum plaster silica physical and mechanical properties building units |
| title | Effect of different forms of silica on the physical and mechanical properties of gypsum plaster composites |
| title_full | Effect of different forms of silica on the physical and mechanical properties of gypsum plaster composites |
| title_fullStr | Effect of different forms of silica on the physical and mechanical properties of gypsum plaster composites |
| title_full_unstemmed | Effect of different forms of silica on the physical and mechanical properties of gypsum plaster composites |
| title_short | Effect of different forms of silica on the physical and mechanical properties of gypsum plaster composites |
| title_sort | effect of different forms of silica on the physical and mechanical properties of gypsum plaster composites |
| topic | composites gypsum plaster silica physical and mechanical properties building units |
| url | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1453 |
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