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황산마그네슘을 혼합한 알칼리 활성화 슬래그의 강도 특성 KCI 등재

Strength Properties of Alkali-activated Slag containing different Replacement Ratios of MgSO4

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한국구조물진단유지관리공학회 논문집 (Journal of The Korea Institute for Structural Maintenance and Inspection)
한국구조물진단유지관리공학회 (The Korea Institute For Structural Maintenance and Inspection)
초록

This paper investigates the strength properties of ground granulated blast furnace slag(GGBFS) with magnesium sulfate(MgSO4). GGBFS was replaced with 1, 2, 3, 4, and 5% MgSO4 by weight. Mixtures of sodium hydroxide(NaOH) and sodium silicate(Na2SiO3) were used as the alkaline activator; a mixture of 5% NaOH and 5% Na2SiO3, and a mixture of 10% NaOH and 10% Na2SiO3 by slag weight. The added activators were dissolved in the water, and the weight ratio of water to slag was 0.45. This study was performed using compressive strength testing, ultrasonic pulse velocity(UPV), water absorption and X-ray diffraction(XRD). In this study, the strength of hardened samples decreases with increasing MgSO4 content. In addition, the water absorption of samples increases and UPV decreases, with the increase of MgSO4 content. Brucite, gypsum and M-S-H(magnesium silicate hydrate) are present in the XRD patterns of the hardened samples.

저자
  • 전유빈(울산과학기술원 도시환경공학부 연구조교수, 공학박사) | Jun, Yubin
  • 임홍재(경북대학교 건설방재공학부 조교수, 공학박사) | Yim, Hong Jae
  • 김태완(부산대학교 생산기술연구소 특별연구원, 공학박사) | Kim, Tae Wan 교신저자