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Title |
Durability Characteristics of Limestone Powder added Concrete for Environment-Friendly Concrete
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Authors |
최우현 ; 박철우 ; 정원경 ; 전범준 ; 김규선 |
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Keywords |
석회석미분말 ; 콘크리트 포장 ; 동결융해저항성 ; 제설염 저항성 ; 알칼리-실리카반응 Limestone powder ; Durability ; Freeze-thaw resistance ; De-icing chemical ; Alkali-silica reaction |
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Abstract |
During the manufacturing of Portland cement, CO2 gas is also necessarily produced through both decarbonation of calcium carbonate and kiln burning. By partially replacing the Portland cement with limestone powder, which is an inert filler in a concrete mixture, CO2 consumption can be reduced in a construction field. This study is to investigate the fundamental durability characteristics of limestone powder added concrete. Experimental variable was the replacement ratio of limestone powder from 0% to 25% with 5% increment. Durability characteristics were investigated by resistance to freeze-thaw, alkali-silica reaction and de-icing chemical in addition to the properties of fresh concrete. From test results, it was observed that the addition of limestone powder did not significantly affect the resistance to freeze-thaw reaction and de-icing chemical. The addition of limestone powder reduced the occurrence potential of alkali-silica reaction by reducing an alkali content in Portland cement.
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