Earticle

초록

영어

The purpose of this study is to investigate the effect of different levels of cement replacement(0, 5, 10, 15, 20, 25%) by copper
slag on the expansion of mortar bars containing reactive aggregates. The experimental program included expansion measurement of
the mortar bar specimens, also the determination of the morphology and composition of the alkali-silica reaction products by using
scanning electron microscopy(SEM), energy dispersive x-ray(EDX), and x-ray fluorescence spectrometer(XRF).
The results of the experimentation are as follow.
1) From the result, the expansion levels of mortar-bars containing CoS reduced as replacement levels increased. and the 25%
replacement of CoS produced the least expansion.
2) The amount of A.E.W decreased with an increasing amount of CoS replacement, which indicated that the amount of
alkali-silica reaction products decreased an increasing amount of CoS replacement.
3) After the accelerated test, SEM and BEM analysis showed the presence of alkali-silica gel and rim around the aggregate and cement paste, however the reaction products decreased markedly as the level of replacement was increased.
4) The presence of CoS changed significantly the alkali-silica gel composition, highlighting the strong relationship between the gel composition and expansion rate. Containing CoS, the higher replacement level, the higher CaO/SiO2, CaO/(Na2O)e, and EBIV ratio in the alkali-silica gel, the lower the gel's capacity for expansion.

목차

Abstract
 1. 서론
  1.1 연구의 배경 및 목적1)
  1.2 연구의 방법 및 범위
 2. 실험계획 및 방법
  2.1 결합재
  2.2 골재
  2.3 시편계획
  2.4 실험방법
 3. 실험결과 및 고찰
  3.1 각 재령별 압축강도 및 압축강도 비
  3.2 수중 양생 28일에서의 수화 생성물
  3.3 혼입율에 따른 모르터 바의 팽창율
  3.4 A.E.W(Additional Evaporable Water)
  3.5 반응 생성물의 미세구조
  3.6 반응 생성물의 화학적 성분
 4. 결론
 참고문헌

저자

• 정의창 [ Jeong, Euy-Chang | 부산대학교 건축학공학과 석사과정 ]
• 신상엽 [ Shin, Sang-Yeop | 부산대학교 건축학공학과 석사과정 ]
• 김영수 [ Kim, Young-su | 부산대학교 건축학부 교수, 공학박사 ]

참고문헌