Earticle

초록

영어

Modified cement is used for the performance recovery of recently built concrete structure. Types of modified cement can largely divided into inorganic and organic material. Although rapid hardening and ultra rapid hardening mortar are used in modified cement for the completion of repair in the shortest time, not many studies related to magnesia phosphate with rapid hardening capacity have been carried out compared to other materials. In this study, the trait of strength for each composition rate of rapid hardening magnesia phosphate was grasped the possibility as new substitute material was examined. Sodium phosphate, potassium phosphate, and ammonium phosphate added as magnesia phosphate material was mixed with magnesia, fly ash, blast furnace slag, and boric acid to examine the strength, pot life, and the smoothness of the surface.

목차

Abstract
 1. 서론
  1.1 연구의 목적
 2. 이론적 고찰
  2.1 마그네시아 시멘트의 성질
  2.2 인산염의 일반적 성질
  2.3 마그네시아 인산염의 접착 특성
  2.4 마그네시아 인산염의 수축 특성
  2.5 MgO분말을 혼입한 시멘트 복합체의 특성
 3. 기초실험 결과
  3.1 인산나트륨(Na) 실험
  3.2 인산암모늄(NH) 실험
  3.3 인산칼륨(K) 실험
  3.4 인산암모늄(NH)의 혼입량에 따른 성상
  3.5 지연제량에 따른 지연효과 규명
  3.6 인산칼륨 대체재로 인산나트륨 적용에 따른 성상
 4. 실험계획 및 방법
  4.1 실험계획
  4.2 사용재료
 5. 실험 결과 및 분석
  5.1 유동특성 변화
  5.2 압축강도 및 휨강도 변화율
  5.3 냄새의 유무
  5.4 작업성 및 가사시간
 6. 결론
 참고문헌

저자

• 김병기 [ Kim, Byung-Kim | 국립한밭대학교 공과대학 건축공학과 학부과정 ]
• 김준영 [ Kim, June-Young | 국립한밭대학교 공과대학 건축공학과 학부과정 ]
• 문지환 [ Moon, Ji-Hwan | 국립한밭대학교 공과대학 건축공학과 학사과정 ]
• 이상수 [ Lee, Sang-Soo | 국립한밭대학교 공과대학 건축공학과 부교수, 공학박사 ]
• 송하영 [ Song, Ha-Young | 국립한밭대학교 공과대학 건축공학과 교수, 공학박사 ]

참고문헌