Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Properties of Grout Material for Seawall Using Slags from Steel Making Industry

철강산업부산물을 사용한 방조제용 그라우트 재료 및 그 특성

  • Received : 2022.11.15
  • Accepted : 2022.12.13
  • Published : 2022.12.30
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Abstract

The problem in the construction of seawall reinforcing the seawall where there is seawater flow is the outflow of materials. Gravity-type pouring of concrete is difficult to fill the voids smoothly, and the cement of concrete that has not hardened is likely to be dispersed in seawater. This phenomenon not only reduces the reliability of quality after concrete hardening, but can also adversely affect the surrounding environment. Therefore, there is a need for a gel-like injection material that can be injected, In this study, the initial strength and durability improvement effect of seawater immersion were evaluated by using electrofurnace reduction slag and blast furnace slag with acute properties. As a result of the experiment, it was possible to prepare a gel-like injection material having flowability through reaction with silica-based chemical liquid. The flowability of the gel is 105~143 mm depending on the formulation, and the on-site simulation test can fill the voids without external leakage, confirming its on-site applicability.

해수의 흐름이 존재하는 방조제 제체 보강공사 시 가장 큰 문제는 재료의 유출로, 콘크리트의 중력식 타설은 원활히 공극을 채우기 어렵고 굳지 않은 콘크리트의 시멘트는 해수에 분산될 확률이 높기 때문에 경화 후 품질의 신뢰성이 저하될 뿐만 아니라, 인근 환경에 악역향을 끼칠 수 있다. 이에 주입이 가능한 겔형태의 주입재가 필요하다, 본 연구에서는 급결성을 띠는 전기로환원슬래그 및 고로슬래그를 활용하여 초기 강도와 해수 침지에 따른 내구성 향상 효과를 평가하였다, 실험 결과 실리카계 약액과의 반응을 통해 흐름성을 갖는 겔형태의 주입재 제조가 가능하였으며 겔의 흐름성은 배합에 따라 105~143 mm 수준으로 현장모사 시험을 통해 외부 유출 없이 공극을 채울 수 있어 현장 적용성을 확인하였다.

Keywords

Acknowledgement

본 논문은 국토교통과학기술진흥원의 국토교통지역혁신기술개발사업(과제번호 : RS-2022-00143830)의 연구비 지원에 의해 수행되었으며 이에 감사드립니다.

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