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2024 Vol.23, Issue 4 Preview Page

Research Article

A Study on the Engineering Properties and Field Applicability of Inorganic Binder with Industrial by-Products

산업부산물 활용 무기결합재의 기초 성능 및 현장 적용성 평가

Kwang-Wu Lee1
,
Jae-Hyun Park2
,
Se-Gwan Seo3
,
Kyung-Nam Kang4*
이 광우1
,
박 재현2
,
서 세관3
,
강 경남4*
1Member, Research Fellow, Department of Geotechnical Engineering Research, 283 Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea.
2Member, Senior Research Fellow, Department of Geotechnical Engineering Research, 283 Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea
3Member, Principal Researcher, ZIAN Company Ltd., 105-8 Sambong-ro, Samrye-eup, Wanju-gun, Jeollabuk-do 55340, Republic of Korea.
4Member, Senior Researcher, Department of Geotechnical Engineering Research, 283 Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea.
*Corresponding Author
31 December 2024. pp. 41-49
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Abstract

Recently, as the demand for carbon-neutral and eco-friendly technologies has increased, the demand for related technologies is also increasing in Korea. Therefore, in this study, an inorganic binder was developed using low-quality high-calcium fly ash from CFBC boilers with high waste volume, and its utilization was evaluated through material property tests and field applicability estimation. The developed inorganic binder is typically a blend of Portland cement (OPC), slag powder (SP), and low-grade high-calcium fly ash (CF), which reduces the amount of cement usage by 70%, with low-grade high-calcium fly ash (CF) accounting for 20% of the total weight. The chemical composition of the inorganic binder is similar to that of OPC, and it satisfies all the KS standards for cement substitutes, including fineness, autoclave expansion, and setting time. The environmental impact assessment showed that it is harmless to the environment. In addition, the field test results showed that the binder meets the required strength for typical soil mixing methods, and the field permeability of the binder satisfied the requirements for water-resistant grout, demonstrating its potential for use as a solidification material in soil improvement.

Keywords
High-calcium fly ash
Binder
Deep mixing method
Soil cement wall
Soil stabilization material

최근 탄소중립 및 친환경 기술요구가 증대됨에 따라 우리나라 또한 관련 기술 수요가 높아지고 있다. 이에 따라 본 연구에서는 폐기량이 많은 CFBC 보일러의 고칼슘 플라이애시를 사용하여 무기결합재를 개발하였으며, 재료특성 및 현장 적용성 평가를 통해 그 활용성을 평가하였다. 개발된 무기결합재는 보통 포틀랜드 시멘트(OPC)와 슬래그 분말(SP), 고칼슘 플라이애시(CF)가 혼합된 것으로서, 시멘트 사용량은 70% 줄이고 고칼슘 플라이애시(CF)가 전체의 20%를 차지한다. 무기결합재의 화학성분은 OPC와 유사하며, 분말도, 오토클레이브 팽창도, 응결시간 등 시멘트 대체재로서의 KS 기준을 모두 만족하였다. 환경영향평가 결과 환경에도 무해한 것으로 확인되었다. 또한 현장 시험시공 결과 일반적인 지반혼합공법의 요구 강도를 만족하였고, 현장투수시험 결과 차수용 그라우트의 요구 수준도 만족하는 것으로 나타났다. 따라서, 개발된 산업부산물 활용 무기결합재는 지반혼합처리용 고화재로서 활용할 수 있음이 확인되었다.

References
1

Cho, D. Y., Lee, G. C. and Baek, D. H. (2016), "Plan for Expanding the Recycling and Reuse Status of Coal Ash as Construction Materials", Magazine of RCR, Vol.11, No.3, pp.18-24.

2

Czigler, T., Reiters, S., Schulze, P. and Somers, K. (2020), "Laying the Foundation for Zero-Carbon Cement", Chicago, IL: McKinsey and Company. Available online at: https://www.mckinsey.com/industries/chemicals/our-insights/laying-the-foundation-for-zero-carbon- cement (accessed March 25, 2021).

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6

Park, J. H., Yoo, W. G., Seo, S. G. and Lee, K. W. (2022), "A Fundamental Study on the Development of Soil Stabilization Materials for Soil Mixing Method using Vietnam Fly Ash and Blast Furnace Slag", Journal of the Korea Geosynthetics Society, Vol.21, No.4, pp.111-121.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 23
  • No :4
  • Pages :41-49
  • Received Date : 2024-11-08
  • Revised Date : 2024-11-19
  • Accepted Date : 2024-11-19
  • DOI :https://doi.org/10.12814/jkgss.2024.23.4.041
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