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2025 Vol.41, Issue 3
Engineering Characteristics of CLSM with a Cement, Fly Ash, and Plaster Mixing Ratio

시멘트, 플라이애쉬, 석회 배합비율에 따른 유동성 채움재의 공학적 특성 연구

Young-Tae Seo1
,
Min-Ji Jung2
,
Byeong-Jun Kim3*
서 영태1
,
정 민지2
,
김 병준3*
1Member, Graduate Student, Dept. of Department of Civil Engineering, Korea Maritime Ocean Univ.
2College Student, Dept. of Department of Civil Engineering, Korea Maritime Ocean Univ.
3Member, Team Manager, Geowon Engineering Co., Ltd.
1정회원, 한국해양대학교 토목공학과 대학원생
2비회원, 한국해양대학교 대학생
3정회원, ㈜거원엔지니어링 팀장
*Corresponding Author
30 June 2025. pp. 5-14
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Abstract

In this study, we propose a standard for the uniaxial compressive strength of controlled low-strength material (CLSM) with a mixing ratio of cement, fly ash, and plaster. According to the Ministry of Land, Infrastructure and Transport, the uniaxial compressive strength of the auxiliary base layer or road surface layer should be 2.0 MPa at 10 days of curing. However, the uniaxial compressive strength of CLSM currently used in Busan Metropolitan City is below 0.6 MPa. Herein, fly ash, cement, and plaster were mixed to prepare a test material and uniaxial compressive strength tests were conducted after curing for 7, 14, and 28 days. The uniaxial compressive strengths of the cement-based test bodies rarely exceeded 1.0 MPa; only two samples achieved compressive strengths of 1.0 MPa or higher. After applying 5%–10% of plaster, the long-term compressive strength was typically improved to 1.0 MPa or higher at 28 days of curing and reached up to 1.879 MPa at maximum.

Keywords
Cement
CLSM
Fly ash
Mixing ratio
Plaster
Uniaxial compressive strength

본 연구에서는 도로 하부 공동에 사용되는 유동성 채움재의 일축압축강도 기준을 제안하고자 한다. 국토교통부에 따르면 보조기층과 노상층은 양생 10일 기준 압축강도 2.0MPa 이상으로 제안하고 있다. 하지만 현재 부산광역시에서 사용하는 유동성 채움재의 일축압축강도는 0.6MPa 이하로 국토교통부가 제안한 압축강도 대비 낮은 일축압축강도를 나타냈다. 본 연구에서는 플라이애시와 시멘트, 석회를 배합하여 공시채를 제작하였으며, 7일, 14일, 28일 기준으로 각각 양생 후 일축압축강도 시험을 수행하였다. 시험 결과 플라이애시, 시멘트를 사용한 공시채의 일축압축강도는 대부분 1.0MPa을 넘지 못하며, 1.0MPa 이상의 압축강도를 나타낸 시료는 단 2회에 뿐이었다. 반면 석회를 5~10% 적용한 경우 장기 압축강도가 양생 28일 기준 대부분 1.0MPa 이상 나타났으며, 최대 1.879MPa까지 나타났다.

References
1

ACI Committee 229, Controlled Low Strength Materials, ACI Manual of Concrete Practice. ACI 229 R94, 1994.

2

An, J. S., Kang, N. K., Song, K. I., and Kim, B. C. (2019), "A Numerical Study on the Influence of Small Underground Cavities for Estimation of Slope Safety Factor", Journal of the Korean Tunnelling and Underground Space Association, Vol.21, No.5, pp.621-640, https://doi.org/10.9711/KTAJ.2019.21.5.621.

3

Busan Metropolitan City Underground Cavities Management Standards (2021).

4

Chemius (2022), Chemi-FHL of Construction, https://www.chemius.co.kr.

5

Choi, Y. S., Kim, B. I., Moon, I. J., and H. J. (2016), "Evaluation on Uniaxial Compression Strength of SSG Method with Curing Condition", Journal of the Korean Academia-Industrial Cooperation Society, Vol.17, No.2, pp.15-20, https://doi.org/10.5762/KAIS.2016.17.2.15.

10.5762/KAIS.2016.17.2.15
6

Design Tips for Road Paving Structures (2015), Ministry of Land, Infrastructure and Transport, p.38.

7

Eom, T. U., Kim, H. M., Kim, C. K., Jang, K. J., and Pyo, M. R. (2008), "The Weathering Index and Prediction of Uniaxial Compressive Strength for Chung-Ju Granite", Proceeding of the Korean Geotechnical Society, pp.863-874.

8

Han, M. S. (2017), A Risk Assessment of Ground Subsidence by GPR and CCTV Investigation, Ph.D. Thesis, Seoul National University of Science and Technology, 161p.

9

Han, Y. S. (2018), "Numerical Analysis and Exploring of Ground Condition during Groundwater Drawdown Environment in Open-Cut Type Excavation", Journal of the Korean Geotechnical Society, Vol.34, No.11, pp.93-105, https://doi.org/10.7843/kgs.2018.34.11.93.

10

Housing Research Institute Korea National Housing Corporation (1999), "The Characteristics of Fly-ash Concrete and It's the Use", pp.2-3.

11

Jang, S. S. (2020), Engineering Characteristics of Controlled Low Strength Materials using Paper Sludge Ash, Master's Thesis, Korea National University of Transportation, 45p.

12

Jung, M. J., Jeon, B. W., and Kim, B. J. (2024), "A Study on the Engineering Characteristics of CLSM", Journal of the Korean Geotechnical Society, Vol.40, No.2, pp.19-28, https://doi.org/10.7843/kgs.2024.40.2.19.

13

Kim, B. J. and Jeon, B. W. (2022), "A Study on the Suitability of CLSM Mixing Raio Considering Dry Shrinkage", Journal of the Korean Geotechnical Society, Vol.38, No.12, pp.7-17.

14

Kim, J. H., Cho, S. D., Kong, J. Y., Jung, H. S., and Chun, B. S. (2010), "Curing Characteristics of Controlled Low Strength Material Made with Coal Ashes", Journal of the Korean Geo-Environmental Society, Vol.11, No.11, pp.77-85.

15

Kim, S. C. (2019), Engineering Characteristics and Applicability of Controlled Low Strength Material according to Type of Fly Ash, Ph.D. Thesis, Kyungpook National University, 121p.

16

Kim, Y. W. (2025), A Study on Engineering Properties and Field Application of Controlled Low Strength Materials using Excavated Soil, Ph.D. Thesis, Chungnam National University, 3p, https://www.kgsjournal.org/articles/article/GODd/.

17

Lee, D. Y. and Cho, N. K. (2016), "Understanding of Subsurface Cavity Mechanism due to the Deterioration of Buried Pipe", Journal of the Korean Geotechnical Society, Vol.32, No.12, pp.33-43, https://www.kgsjournal.org/articles/article/Z1vo/.

10.7843/kgs.2016.32.12.33
18

Lee, S. Y. (2016), A Study on the Experimentation a Controlled Low Strength Material using Industrial By-Products, Master's Thesis, Dong Yang University, 87p.

19

Lee, S. Y., Lim, D. S., Jung, H. S., Kong, J. Y., and Kwon, S. H. (2018), "Development and Field Application of Fluid Filler for Emergency Recovery using Bottom Ash and Gypsum", Journal of the Korean Geo-Environmental Society, Vol.13, No.3, pp.22-31, https://doi.org/10.14190/mrcr.2018.13.3.022.

20

Ministry of Land, Infrastructure and Transport (2017), "Road Pavement Substructure Construction Guidelines", pp.23.

21

Park, C. H., Won, K. S., Byun, J. H., Min, D. H., and Yoon, H. K. (2013), "The Investigation of Alluvium by Using Electrical Resistivity, Seismic Survey and GPR", Journal of the Korean Geotechnical Society, Vol.29, No.9, pp.17-29, https://doi.org/10.7843/kgs.2013.29.9.17.

10.7843/kgs.2013.29.9.17
22

Park, J. W. (2015), A Study on Characteristics of Flowable Fill using Calcium Carbonate By-Product of CO2 Collection, Master's Thesis, Seoul National Unversity of Science and Technology, 52p.

Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 41
  • No :3
  • Pages :5-14
  • Received Date : 2024-09-12
  • Revised Date : 2025-02-05
  • Accepted Date : 2025-03-11
  • DOI :https://doi.org/10.7843/kgs.2025.41.3.5
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