Mechanical Properties of Cementless Shotcrete Based on the Mix Proportion of the Blended Materials

Ho Yeon Jung; Hun-Ki Kim; Chan-Yong Choi

doi:10.12814/jkgss.2024.23.4.023

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2024 Vol.23, Issue 4 Preview Page Next Page

Research Article

Mechanical Properties of Cementless Shotcrete Based on the Mix Proportion of the Blended Materials 무시멘트계 숏크리트의 혼합재료의 배합비에 따른 역학특성

31 December 2024. pp. 23-30

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Abstract

The development of cementless-based shotcrete can be an economical and eco-friendly technology in terms of replacing Portland cement. However since the cementless-based shotcrete uses activators for hydroponic reactions, its mechanical properties may vary depending on the chemical composition of the raw material, the type of activator, and addition amount of the activator. Also, the quality as an industrial by-product is not homogeneous and is not easy to handle. In this paper, a mechanical evaluation was performed through an mixing experiments to evaluate the applicability of cementless shotcrete as a low-strength material for shotcrete on the cut slope that does not have structural strength. As a result, the property evaluation results of the eco-friendly three-component binder combination furnace slag:fly ash:silica fume combination (4:4:2) and (7:2:1). The combination (4:4:2) showed limitations in early strength expression but the combination (7:2:1) were confirmed the possibility of early strength expression.

Keywords

Cementless shotcrete

Blast furnace slag

Fly ash

Silica fume

Mechanical properties

무시멘트 기반 숏크리트는 포틀랜드 시멘트를 대체할 수 있는 경제적이고 친환경적인 기술이 될 수 있다. 그러나 무시멘트 기반 숏크리트는 수화반응을 위한 활성제를 사용하기 때문에 원료의 화학적 조성, 활성제의 종류, 활성제의 첨가량에 따라 성질이 달라질 수 있다. 또한, 산업 부산물을 사용하기 때문에 품질이 균일하지 않으면 다루기가 쉽지 않다. 본 논문에서는 구조 강도를 가지지 않는 절토사면에 사용하기 위한 저강도 재료로써 무시멘트 숏크리트의 적용 가능성을 평가하기 위해 혼합 실험을 통한 숏크리트의 강도 평가를 수행하였다. 고로슬래그, 플라이애시, 실리카 흄을 바인더로 조합하여 바인더 조합에 따른 강도 특성 결과를 제시하였다. 바인더 조합(4:4:2)은 초기 강도 발현에 한계가 있었으나, 조합(7:2:1)은 초기 강도가 비탈면 콘크리트 품질기준을 만족하는 것을 확인하였다.

References

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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 :23-30
Received Date : 2024-08-12
Revised Date : 2024-09-23
Accepted Date : 2024-10-23
DOI :https://doi.org/10.12814/jkgss.2024.23.4.023

Journal of the Korean Geosynthetics Society ISSN:2508-2876(Print) 2287-9528(Online) 한국지반신소재학회 논문집

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