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Properties of Cement Mortar According to Mixing of Circulating Fluidized Bed Fly Ash and Pulverized Coal Fly Ash based on Blast Furnace Slag

고로슬래그 기반 순환유동층 플라이애시 및 미분탄 플라이애시 혼입에 따른 시멘트 모르타르의 특성

  • Received : 2021.02.01
  • Accepted : 2021.04.13
  • Published : 2021.04.20

Abstract

In this study, the characteristics of the cement mortar replaced with fly ash and ground granulated blast furnace slag generated during circulating fluidized bed combustion method and pulverized coal combustion process were investigated. As a result of the study, when mixed with circulating fluidized bed combustor fly ash and pulverized coal combustion fly ash, it is advantageous not only in terms of strength development but also in terms of durability. The circulating fluidized bed combustor fly ash contributes to the improvement of initial reactivity, and the pulverized coal combustion fly ash is involved in long-term strength development through pozzolanic reaction. Therefore, it can be seen that the mixed use of circulating fluidized bed combustor fly ash and pulverized coal combustion fly ash acts as a complementary factor for cement mortar substituted with ground granulated blast furnace slag.

본 연구에서는 산업부산물 중 순환유동층 연소방식과 미분탄 연소과정에서 발생되는 플라이애시와 고로슬래그 미분말을 치환한 시멘트 모르타르의 특성을 파악하였다. 연구 결과, 순환유동층 플라이애시 및 미분탄 플라이애시 혼합 사용 시 강도발현 뿐만 아니라 내구성 측면에서도 유리하게 나타난다. 순환유동층 플라이애시는 초기 반응성 향상에 기여하며, 미분탄 플라이애시는 포졸란 반응으로 장기 강도 발현에 관여하게 된다. 따라서 순환유동층 플라이애시와 미분탄 플라이애시의 혼합사용은 고로슬래그 미분말을 치환한 시멘트 모르타르의 상호 보완적인 요소로 작용함을 알 수 있다.

Keywords

References

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