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2026 Vol.27, Issue 10 Preview Page
Compressive Strength Characteristics of CLSM Containing Wood Fly Ash

우드플라이애시를 혼입한 CLSM의 압축강도 특성

Sangyun Kim1
,
Hoki Ban2
,
Wonjun Park3*
김 상윤1
,
반 호기2
,
박 원준3*
1Ph.D. Candidate, Dept. of Civil Engineering, Kangwon National University
2Professor, Dept. of Civil Engineering, Kangwon National University
3Professor, Dept. of Urban and Architecture, Kangwon National University
*Corresponding Author
1 October 2026. pp. 37-43
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Abstract

This study evaluated the compressive strength characteristics of controlled low-strength material (CLSM) containing wood fly ash (WFA) as a replacement for fly ash (FA). Three WFA samples, #2602, #2604, and #2606, collected at different periods from the same biomass power plant were used. The water-to-binder ratios (W/B) were 0.8, 0.9, and 1.0, and the WFA replacement ratios were 0, 25, 50, and 100 %. Compressive strength was measured at 7 and 28 days, and the strength development was compared with the particle size and chemical composition of the WFA samples. Compressive strength increased with curing age for all mixtures. Samples #2602 and #2604 showed relatively high strength at 25 % WFA replacement, followed by a decrease with increasing replacement ratio. In contrast, #2606 maintained relatively high strength at higher replacement ratios and showed the maximum 28-day strength of 4.28MPa at W/B 0.8 and 50% replacement. Although the WFA samples were obtained from the same plant, differences in particle size and chemical composition were observed. These differences may be associated with the strength development of WFA-containing CLSM. Therefore, the physicochemical characteristics of WFA should be considered together with W/B and replacement ratio when determining CLSM mixture conditions.

Keywords
Wood fly ash
Controlled low-strength material
Compressive strength
Physicochemical properties

본 연구에서는 우드플라이애시(Wood Fly Ash, WFA)를 플라이애시(FA) 대체재로 혼입한 Controlled Low-Strength Material(CLSM)의 압축강도 특성을 평가하였다. 동일 바이오매스 발전시설에서 서로 다른 시기에 채취한 WFA #2602, #2604 및 #2606을 사용하였으며, 물-바인더비(W/B)는 0.8, 0.9 및 1.0, WFA 치환율은 0, 25, 50 및 100 %로 설정하였다. 각 배합에 대하여 재령 7일 및 28일 압축강도를 측정하고, WFA의 입도 및 화학조성과 강도발현 특성을 비교하였다. 모든 배합에서 재령 증가에 따라 압축강도가 증가하였다. #2602와 #2604는 WFA 치환율 25 %에서 상대적으로 높은 강도를 나타낸 후 치환율 증가에 따라 감소하는 경향을 보였다. 반면 #2606은 높은 치환율에서도 비교적 높은 강도를 나타냈으며, W/B 0.8 및 WFA 치환율 50 %에서 재령 28일 압축강도 4.28 MPa로 전체 배합 중 최대값을 나타냈다. 또한 동일한 발생원에서 채취한 WFA에서도 입도와 화학조성에 차이가 확인되었으며, 이러한 재료특성의 차이가 CLSM의 강도발현과 관련될 가능성이 있는 것으로 판단된다. 이상의 결과로부터 WFA를 CLSM에 활용할 경우 W/B와 치환율뿐만 아니라 사용되는 WFA의 물리·화학적 특성을 함께 고려하여 배합조건을 설정할 필요가 있는 것으로 판단된다.

키워드
우드플라이애시
저강도 유동성 채움재
압축강도
물리·화학적 특성
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Information
  • Publisher :Korean Geo-Environmental Society
  • Publisher(Ko) :한국지반환경공학회
  • Journal Title :Journal of the Korean Geo-Environmental Society
  • Journal Title(Ko) :한국지반환경공학회 논문집
  • Volume : 27
  • No :10
  • Pages :37-43
  • Received Date : 2026-09-07
  • Revised Date : 2026-09-08
  • Accepted Date : 2026-09-14
  • DOI :https://doi.org/10.14481/jkges.2026.27.10.37
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