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Physical and Chemical Properties of Chlorine Bypass System-Dust from Cement Manufacturing

시멘트 생산 시 발생하는 Chlorine Bypass System-dust의 물리 및 화학적 특성

  • Han, Min-Cheol (Department of Architectural Engineering, Cheong-ju University) ;
  • Lee, Dong-Joo (Department of Architectural Engineering, Cheong-ju University)
  • Received : 2019.09.19
  • Accepted : 2019.12.09
  • Published : 2019.12.30

Abstract

This study conducted a series of studies to find alternative ways to use Chlorine Bypass System-dust(CBS-dust) in cement production. The results of engineering characteristics of CBS-dust are summarized as follows. First of all, the density of CBS-dust is 2.40, lighter than cement and the pH was 12.50 which was strong alkaline. In terms of particle size, it was 11.70 ㎛ which was finer than cement. With chemical properties, calcium oxide(CaO) was the highest as 35.10%, potassium oxide(K2O) was 32.43%, potassium chloride(KCl) was 19.46%, sulfur oxide(SO3) was 6.81%, and the remaining chemical components are SiO2, Fe2O3, Al2O3, MgO, and the like. Therefore, if CBS-dust is used as early-strength chemical admixtures in the concrete secondary products that use a large amount of mineral admixtures without rebar, it can be an effective method for increasing the strength of concrete as an alkali activator and preventing early-frost damage of Cold Weather Concrete.

본 연구는 시멘트 제조 시 발생하는 CBS-dust의 새로운 활용방법을 모색하고자 일련의 연구를 진행하는데, CBS-dust의 물리 및 화학적 특성 결과를 요약하면 다음과 같다. 먼저, 물리적 성질로 밀도는 2.40g/㎤으로 시멘트보다 가볍고, pH는 12.50으로 강알칼리성이며, 입도의 경우는 시멘트보다 미세한 11.70㎛로 나타났다. 화학적 특성으로는 산화칼슘(CaO) 성분이 35.10%로 가장 많은 량을 나타내고, 산화칼륨(K2O)이 32.43%, 염화칼륨(KCl)이 19.46% 삼산화황(SO3)이 6.81%이며, 그 이외의 화학성분으로 SiO2, Fe2O3, Al2O3, MgO, 기타 등이었다. 따라서, CBS-dust를 철근이 없는 혼화재를 다량 사용하는 콘크리트 2차 제품에 알칼리 활성화재로 사용한다면, 알칼리 자극제로 콘크리트의 강도증진 및 한중시공 시 초기동해 방지 등에 효과적인 활용법이 될 수 있을 것으로 사료된다.

Keywords

References

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