Influence of air-cooled blast furnace slag aggregate on sulfate attack resistance
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This study evaluated the effect of the use of slag, metakaolin and air-cooled blast furnace slag aggregate on sulfate attackresistance by preparing six mixes. Air-cooled blast furnace slag was used as an aggregate in three of these mixes, each of whichcontained 20% metakaolin, 10% slag, 10% metakaolin and 100% cement. Three other mixes contained natural aggregate withthe above ratios of binders. Slump and compressive strength tests were performed, after which the mixes were immersed ina 3% H2SO4 solution. The compressive strength loss and the concrete mass change rate were then measured after 28, 56, and91 days. The microstructural properties were studied via SEM and EDAX. Based on the results of the above tests, it can beconcluded that metakaolin improves sulfate attack resistance and air-cooled blast furnace slag aggregate shows better sulfateattack resistance compared to natural aggregate.
Abstract
This study evaluated the effect of the use of slag, metakaolin and air-cooled blast furnace slag aggregate on sulfate attackresistance by preparing six mixes. Air-cooled blast furnace slag was used as an aggregate in three of these mixes, each of whichcontained 20% metakaolin, 10% slag, 10% metakaolin and 100% cement. Three other mixes contained natural aggregate withthe above ratios of binders. Slump and compressive strength tests were performed, after which the mixes were immersed ina 3% H2SO4 solution. The compressive strength loss and the concrete mass change rate were then measured after 28, 56, and91 days. The microstructural properties were studied via SEM and EDAX. Based on the results of the above tests, it can beconcluded that metakaolin improves sulfate attack resistance and air-cooled blast furnace slag aggregate shows better sulfateattack resistance compared to natural aggregate.
참고문헌 (41)
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