열화된 콘크리트 도로시설물 보수재료의 내동해성에 대한 실험적 고찰 Experimental Study on Frost Resistance of Repair Mortars for Deteriorated Concrete Road Facilities
pp.1-8
Experimental findings pertaining to the frost resistance of calcium sulfoaluminate (CSA) and amorphous calcium aluminate (ACA) cement-based repair mortars incorporated with anhydrite gypsum are described herein. To prepare the mortars, CSA and/or ACA cements were used as binders, and the water–binder ratio was fixed at 0.57. The compressive and bond strengths, chloride-ion penetration resistance, and scaling resistance of the mortars were measured. Based on the ASTM C666 method, the resistance to both frost action and multi-deterioration of chloride and frost attacks on the mortars were experimentally examined. Calcium aluminate-based binders effectively enhanced the compressive and bond strengths of the mortars owing to the formation of C2AH8 and Ye’elimite hydrates. Furthermore, replacing 25% ACA with OPC yielded excellent resistance to both frost attack and multi-deterioration of chloride and frost attacks. Replacing ACA at an appropriate level as a binder effectively improves the durability of concrete road facilities in winter.
1. 연구배경 및 목적
2. 실험개요
2.1. 사용재료
2.2. 모르타르 배합
2.3. 실험방법
3. 실험결과 및 고찰
3.1. 강도특성
3.2. 염소이온 침투저항성
3.3. 스케일링 저항성
3.4. 동해 저항성
3.5. 염해-동해 복합열화 저항성
4. 결론 및 요약
REFERENCES