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A platform for research: civil engineering, architecture and urbanism
Sugar cane bagasse ash as a pozzolanic admixture in concrete for resistance to sustained elevated temperatures
HighlightsSCBA was characterized for physical properties and chemical composition.Concrete with SCBA up to 25% of binder was exposed to temperatures till 500°C.The SCBA was 70% amorphous silica & similar to Portland cement in particle size.Even at high temperatures, SCBA may effectively replace up to 15% Portland cement.
AbstractIn the present investigation, a feasibility study is made to utilize the sugar cane bagasse ash (SCBA) as an admixture in concrete and examine its role in imparting resistance under elevated temperatures. The ash was obtained from a sugar mill in India where the bagasse was recycled as fuel for the mill. It was characterized for its physical properties and chemical composition. Incorporated as a supplementary cementing admixture, SCBA replaced Portland cement from 0 to 25% by mass fraction at 5% increments. Besides a series that was examined at room temperature, the resulting concrete was subjected to elevated temperatures of 300°C, 400°C and 500°C, being exposed for 2h in each case. The residual compressive and flexural strength were evaluated and compared with the reference performance at room temperature. The results show that the SCBA sample had a grain size distribution very similar to that of the Type GU Portland cement used in this study. X-ray florescence revealed that this ash was chiefly composed of SiO2 (∼70%). At room temperature, the compressive strength of concrete increased till up to 10% SCBA incorporation. Even at 15% cement substitution, it matched that of the reference mix containing Portland cement alone. While there was a consistent drop in the compressive strength at higher temperatures, the inclusion of SCBA marginally slows down this deterioration. On the other hand, the flexural strength of concrete containing SCBA was always lower than that seen with Portland cement alone. However, once again, the drop was seen to be less significant up to 10% cement substitutions. The findings strongly endorse that bagasse ash when used as a supplementary cementing admixture, imparts resistance to concrete against elevated temperatures.
Sugar cane bagasse ash as a pozzolanic admixture in concrete for resistance to sustained elevated temperatures
HighlightsSCBA was characterized for physical properties and chemical composition.Concrete with SCBA up to 25% of binder was exposed to temperatures till 500°C.The SCBA was 70% amorphous silica & similar to Portland cement in particle size.Even at high temperatures, SCBA may effectively replace up to 15% Portland cement.
AbstractIn the present investigation, a feasibility study is made to utilize the sugar cane bagasse ash (SCBA) as an admixture in concrete and examine its role in imparting resistance under elevated temperatures. The ash was obtained from a sugar mill in India where the bagasse was recycled as fuel for the mill. It was characterized for its physical properties and chemical composition. Incorporated as a supplementary cementing admixture, SCBA replaced Portland cement from 0 to 25% by mass fraction at 5% increments. Besides a series that was examined at room temperature, the resulting concrete was subjected to elevated temperatures of 300°C, 400°C and 500°C, being exposed for 2h in each case. The residual compressive and flexural strength were evaluated and compared with the reference performance at room temperature. The results show that the SCBA sample had a grain size distribution very similar to that of the Type GU Portland cement used in this study. X-ray florescence revealed that this ash was chiefly composed of SiO2 (∼70%). At room temperature, the compressive strength of concrete increased till up to 10% SCBA incorporation. Even at 15% cement substitution, it matched that of the reference mix containing Portland cement alone. While there was a consistent drop in the compressive strength at higher temperatures, the inclusion of SCBA marginally slows down this deterioration. On the other hand, the flexural strength of concrete containing SCBA was always lower than that seen with Portland cement alone. However, once again, the drop was seen to be less significant up to 10% cement substitutions. The findings strongly endorse that bagasse ash when used as a supplementary cementing admixture, imparts resistance to concrete against elevated temperatures.
Sugar cane bagasse ash as a pozzolanic admixture in concrete for resistance to sustained elevated temperatures
Setayesh Gar, Parisa (author) / Suresh, Narayana (author) / Bindiganavile, Vivek (author)
Construction and Building Materials ; 153 ; 929-936
2017-07-11
8 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2017
| British Library Online Contents | 2017
Ultrafine grinding of sugar cane bagasse ash for application as pozzolanic admixture in concrete
| Online Contents | 2009