COMPRESSIVE STRENGTH OF FIRE-DAMAGED GEOPOLYMER CONCRETE-FILLED STEEL TUBULAR COLUMNS
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Abstract
This paper presents a study on the compressive strength of fire-damaged geopolymer concrete-filled steel tubular columns. The geopolymer concrete-filled steel tubular short columns. The rice husk ash and fly ash were used to replace the ordinary Portland cement by 60 and 40 percent, respectively. At the specimen age of 24 days, fire tests were conducted following the ISO-834 standards for durations of 90 and 120 minutes. The specimens were left naturally air-cooled in the furnace for one day. At the specimen ages from 75 to 85 days, static compression tests were conducted. The test results showed that geopolymer concrete-filled steel tubular columns have higher residual compressive strength than those filled with Portland cement concrete in the case of 90-minute fire exposure. However, the residual compressive strength significantly decreased, resulting in lower performance compared to steel tube columns filled with Portland cement concrete in the case of 120-minute fire exposure.
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
The published articles are copyright of the Engineering Journal of Research and Development, The Engineering Institute of Thailand Under H.M. The King's Patronage (EIT).
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