동결융해와 황산염의 복합작용을 받는 부순모래 모르타르의 기초 특성 평가

Evaluation on Basic Properties of Crushed Sand Mortar in Freezing-Thawing and Sulfate Attack

  • 김명식 (부경대학교 건설공학부) ;
  • 백동일 (부경대학교 건설공학부) ;
  • 최강석 (부경대학교 건설공학부)
  • Kim, Myeong-Sik (Department of Civil Engineering, Pukyung National University) ;
  • Baek, Dong-Il (Department of Civil Engineering, Pukyung National University) ;
  • Choi, Kang-Seok (Department of Civil Engineering, Pukyung National University)
  • 발행 : 2009.10.31

초록

Exposed to various environments, concrete confronts degradation by a lot of physical and chemical reaction. Though so many experiments and theorizations on the single condition of concrete degradation have been carried out by constant studies, the truth for now is that there are few studies on the compound phenomenon of degradation related with marine environments. Accordingly, this study measured the degree of degradation in the change of external shape, the change of unit weight and compressive strength, ultrasonic velocity test, and the change of length, etc. after exposing the specimen of cement mortar to the environment between 0 cycle and the maximum of 300 cycles under the condition of aquatic curing, freezing and thawing, and compound degradation, using mineral admixture effective for concrete degradation as a binder. The result indicated that the case of adding mineral admixture showed greater resistance than that of using OPC only, and specifically, the specimen with the additive of slag powder and three component system showed very excellent resistance to freezing and thawing, and compound degradation.

키워드

참고문헌

  1. 김강민, 백동일, 김명식, 장희석 (2005). "부순모래를 사용한 시멘트 모르타르의 화학적 침해 저항 특성", 한국콘크리트학회 2005년도 가을 학술발표회 논문집, 제17권, 제2호, pp 519-522
  2. 김명식, 백동일 (2007). "황산염 침해를 받는 부순모래 모르타르의 단위중량 및 압축강도 특성", 대한토목학회 논문집, 제27권, 제4-A호, pp 585-591
  3. 이양수, 김정환, 최상흘, 한기성 (1990). "혼화재를 사용한 시멘트 경화체의 동결융해저항성", 대한세라믹학회지, 요업학회지 제27권, 제3호, pp 437-443
  4. American Society for Testing Materials (ASTM) C 672 (2004). Standard Test Method for Scaling Resistance of Concrete Surfaces Exposed to Deicing Chemicals (ASTM C 672/C 672M-03)