Influence of mortar composition on flexural and impact performance of ferrocement panels for usage in secondary roofing
By: Roopa, V
.
Contributor(s): Abdul Latheef, M. J.
Publisher: Mumbai ACC LTD 2022Edition: Vol.96(8), Aug.Description: 45-55p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: In tropical countries, maximum heat gain in buildings is through roof slab, which necessitates the provision of insulation to improve the comfort of inhabitants. Secondary roofing using ferrocement panels is one the effective methods of heat insulation. This study analyses the flexural and impact performance of ferrocement panels made with three types of cement mortars (control mortar, silica powder-modified mortar, and metakaolin-modified mortar), mesh types (crimped wire mesh, and galvanized welded wire mesh) and different mesh layers (single and double). Ferrocement panels of sizes 900 × 300 × 25 mm (18 nos.) and 600 × 600 × 25 mm (12 nos.) were cast to study the flexural behavior and the impact strength respectively, as per relevant standards/methods. The test results indicate that the ferrocement panels with two mesh layers and metakaolin-modified mortar exhibited significantly increased flexural strength, as compared to other tested categories. All the flexural test specimens were observed with the formation of flexural cracks in the tension zone, followed by crushing of mortar beyond ultimate load, in the middle one-third region. Impact test results revealed a significantly improved energy absorption for two mesh layer specimens as compared to single mesh layer specimens. It can be concluded that the ferrocement panels cast with two mesh layers, and metakaolin-modified mortar offered improved flexural, and impact strength and is recommended for use in secondary roofing.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
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Articles Abstract Database
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2022-2359 |
In tropical countries, maximum heat gain in buildings is through roof slab, which necessitates the provision of insulation to improve the comfort of inhabitants. Secondary roofing using ferrocement panels is one the effective methods of heat insulation. This study analyses the flexural and impact performance of ferrocement panels made with three types of cement mortars (control mortar, silica powder-modified mortar, and metakaolin-modified mortar), mesh types (crimped wire mesh, and galvanized welded wire mesh) and different mesh layers (single and double). Ferrocement panels of sizes 900 × 300 × 25 mm (18 nos.) and 600 × 600 × 25 mm (12 nos.) were cast to study the flexural behavior and the impact strength respectively, as per relevant standards/methods. The test results indicate that the ferrocement panels with two mesh layers and metakaolin-modified mortar exhibited significantly increased flexural strength, as compared to other tested categories. All the flexural test specimens were observed with the formation of flexural cracks in the tension zone, followed by crushing of mortar beyond ultimate load, in the middle one-third region. Impact test results revealed a significantly improved energy absorption for two mesh layer specimens as compared to single mesh layer specimens. It can be concluded that the ferrocement panels cast with two mesh layers, and metakaolin-modified mortar offered improved flexural, and impact strength and is recommended for use in secondary roofing.
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