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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.14 No.2
- 발행연도
- 2020.3
- 수록면
- 281 - 291 (11page)
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초록· 키워드
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In regions where the concrete structures are exposed to a salty environment, the concrete requires high resistance to chloride-ion penetration. To achieve higher resistance against chloride ingress, a pozzolanic admixture incorporating a high volume of SiO₂ and Al₂O₃ has been developed. The admixture is a fine mineral powder with a specific surface area of 13,000 m²/kg or higher. It is typically mixed with the concrete at a cement replacement level of 5-13 mass% (20-40 kg/m³). To demonstrate the applicability of the admixture to general ready-mix concretes, this study examined the fundamental properties of concrete cured under standard conditions regarding resistance against chloride ingress. Chloride immersion tests revealed high resistance against penetration of concrete produced with the admixture. Pore-size distribution analysis confirmed that the volume of pores less than 0.01 μm diameter increased whereas a decrease of large pores occurred (0.1 μm diameter or larger). The major contributor to the high resistance was found to be the immobilization of penetrating chloride ions by the formation of Friedel’s salt.
목차
Abstract
1. Introduction
2. Materials and Mixture Proportions of Concrete
3. Test Programs
4. Test Results and Discussion
5. Conclusions
References
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UCI(KEPA) : I410-ECN-0101-2020-532-000540064