Mechanical and micro structural studies of fiber reinforced high performance mortar mixtures at elevated temperature
By: Das, Shaswat Kumar
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Contributor(s): Sahoo, Sambita.
Publisher: Thane ACC LTD 2022Edition: Vol.96(3), Mar.Description: 43-50p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: The present study evaluates the effectiveness of two different fibers, i.e., steel and Polypropylene (PP), along with their hybridisation on the resistance properties of a mortar mix at elevated temperature. The used mortar mix has been made with a combination of silica fume and fly ash as mineral admixtures. To improve the temperature resistance property and sustainability of the fiber reinforced mortar (FRM), a combination of pumice and slag fines was used in place of natural sand aggregates. The FRM was reinforced with only steel, PP, and a mixture of steel and PP fibers. All FRM mixes were then evaluated for high-temperature performance at 300°C and 600°C inside a furnace for a duration of 1 hour. After the exposure to the elevated temperature of the FRM mixes, their performances were assessed through compressive strength tests, visual observation, and microstructural evaluations. The results revealed that the steel fiber was the most efficient one to prevent spalling and reduction in compressive strength at below and above 300°C as compared to the only PP and PP+steel fibers reinforced FRM. The improvement in the residual compressive strength values of the steel fiber reinforced FRM was 59.52 % and 19.05 % at 300°C and 600°C, respectively, as compared to the ambient temperature values.
| 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 | 2022-1987 |
The present study evaluates the effectiveness of two different fibers, i.e., steel and Polypropylene (PP), along with their hybridisation on the resistance properties of a mortar mix at elevated temperature. The used mortar mix has been made with a combination of silica fume and fly ash as mineral admixtures. To improve the temperature resistance property and sustainability of the fiber reinforced mortar (FRM), a combination of pumice and slag fines was used in place of natural sand aggregates. The FRM was reinforced with only steel, PP, and a mixture of steel and PP fibers. All FRM mixes were then evaluated for high-temperature performance at 300°C and 600°C inside a furnace for a duration of 1 hour. After the exposure to the elevated temperature of the FRM mixes, their performances were assessed through compressive strength tests, visual observation, and microstructural evaluations. The results revealed that the steel fiber was the most efficient one to prevent spalling and reduction in compressive strength at below and above 300°C as compared to the only PP and PP+steel fibers reinforced FRM. The improvement in the residual compressive strength values of the steel fiber reinforced FRM was 59.52 % and 19.05 % at 300°C and 600°C, respectively, as compared to the ambient temperature values.
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