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2024 Vol.40, Issue 2 Preview Page
A Study on the Engineering Characteristics of CLSM

유동성 채움재의 공학적 특성 연구

Min-Ji Jung1
,
Byeong-Won Jeon2
,
Byeong-Jun Kim3*
정 민지1
,
전 병원2
,
김 병준3*
1College Student, Dept. of Department of Civil Engineering, Korea Maritime Ocean Univ.
2Team Manager, Busan Metropolitan City Sports Facilities Team.
3Member, Team Manager, Geowon Engineering Co., Ltd.
1비회원, 한국해양대학교 토목공학과 대학생
2비회원, 부산광역시 문화체육국 체육진흥과 체육시설팀 주사
3정회원, ㈜거원엔지니어링 팀장
*Corresponding Author
30 April 2024. pp. 19-28
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Abstract

This study explores the long-term decline in the uniaxial compressive strength of Controlled Low Strength Material (CLSM) by preparing a sample with a 1:1 mixing ratio of CLSM and water. Uniaxial compressive strength tests were conducted after 7 and 28 days of curing. The results revealed that the compressive strength at 28 days was reduced by a factor of 2.85 compared to that at 7 days. Additionally, when expansion was introduced under the same mixing conditions, there was a significant reduction in compressive strength. Point load strength tests based on 7 and 28 days of curing indicated a disparity of 29.27 to 58.76 and 48.19 to 95.13 times, respectively, between the point load strength and the uniaxial compressive strength at 7 days. The differences observed in the findings of this study compared to previous studies may be attributed to variations in the precision of the test method and the sample production process. Therefore, it is essential to establish clear testing methods to accurately evaluate CLSM.

Keywords
Controlled low strength material
Expansion
Point load strength
Uniaxial compressive strength

본 연구에서는 유동성 채움재의 장기 압축강도 저하를 확인하고, 그 원인을 규명하고자 유동성 채움재와 물의 배합비율 1:1 적용하여 시료를 제작하였으며, 재령 7일, 28일 기준 일축압축강도 시험을 수행하였다. 일축압축시험 결과 재령 28일 기준 압축강도는 7일 대비 2.85배 감소하였다. 또한, 똑같은 배합 조건에서 팽창제를 첨가하였을 경우 압축강도가 대폭 감소하였다. 현장에서 배합된 유동성 채움재를 재령 7일, 28일 기준으로 점하중강도 시험을 수행하였으며, 똑같은 배합 조건 및 재령 일 기준으로 일축압축강도와의 차이가 재령 7일 기준 29.27~58.76배, 재령 28일 기준 48.19~95.13배로 나타났다. 본 연구결과가 선행연구 결과와 다소 차이를 나타내고 있음에 대한 이유는 시험방법 및 시료 제작 과정에서의 정밀도 차이에 의한 것임으로 유동성 채움재 평가를 위하여 명확한 시험방법에 대한 규제가 필요하다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 40
  • No :2
  • Pages :19-28
  • Received Date : 2023-11-29
  • Revised Date : 2024-01-03
  • Accepted Date : 2024-01-03
  • DOI :https://doi.org/10.7843/kgs.2024.40.2.19
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