Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Hydration characteristics of Portland blast-furnace slag cement mortar using sulfuric acid neutralized liquid red mud

황산 중화 액상레드머드를 사용한 고로슬래그 시멘트 모르타르의 수화 특성

  • Kang, Suk-Pyo (Dept. of Architectural Engineering, woosuk University) ;
  • Park, Kyu-Eun (Dept. of Architectural Engineering, woosuk University) ;
  • Kim, Sang-jin (Dept. of Architectural Engineering, woosuk University)
  • Received : 2023.09.11
  • Accepted : 2023.12.20
  • Published : 2024.01.30
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Abstract

In this paper, liquid red mud and sulfuric acid neutralized liquid red mud were manufactured to recycle red mud sludge, a by-product of the aluminum manufacturing process, and applied to slag cement mortar to examine the possibility of its use as a building material. Liquid red mud and sulfuric acid neutralization As a result of replacing liquid red mud with slag cement mortar, it was found to have a positive effect by shortening the initial setting time and improving initial strength. In particular, when sulfuric acid is added to red mud, it reacts with NaOH to produce a compound in the form of Na2(SO4)3, which acts as a factor in reducing the rapid setting phenomenon of slag cement mortar added with sulfuric acid-neutralized liquid red mud, reducing the 28-day strength. The results showed higher strength than slag cement mortar added with liquid red mud. In the XRD analysis results, Xonotlite and Gismondite were identified as the new A peak and Gismondite as the B peak, which appeared to affect the initial compressive strength results. Therefore, it is believed that sulfuric acid neutralization liquid red mud using red mud sludge has high utility in the construction industry.

Keywords

Acknowledgement

이 논문은 2022년 중소기업기술정보진흥원 중소벤처기업부의 구매조건부신제품개발사업(과제번호: S3303468)과 2021년 정부(국토교통부)의 재원으로 국토교통기술진흥원(과제번호: 22TBIP-C160747-02) 및 2023년 대한민국 과학기술정보통신부와 한국연구재단(과제번호: RS-2023-00278657)의 지원을 받아 수행된 연구임.

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