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Flow and Compressive Strength Properties of Low-Cement Soil Concrete

저시멘트 소일콘크리트의 유동성 및 압축강도 특성

  • Park, Jong-Beom (Department of Architectural Engineering, Graduate School, Kyonggi University) ;
  • Yang, Keun-Hyeok (Department of Plant.Architectural Engineering, Kyonggi University) ;
  • Hwang, Chul-Sung (Department of Civil and Environmental Engineering, Gachon University)
  • 박종범 (경기대학교 일반대학원 건축공학과) ;
  • 양근혁 (경기대학교 플랜트.건축공학과) ;
  • 황철성 (가천대학교 공과대학 토목환경공학과)
  • Received : 2017.10.23
  • Accepted : 2018.03.05
  • Published : 2018.03.30

Abstract

This study examined the effect of binder-to-soil ratio(B/S) and water-to-binder ratio(W/B) on the flow and compressive strength development of soil concrete using high-volume supplementary cementitious materials. As a partial replacement of ordinary portland cement, 10% by-pass dust, 40% ground granulated blast-furnace slag, and 25% circulating fluidized bed combustion fly ash were determined in the preliminary tests. Using the low-cement binder incorporated with clay soil or sandy soil, a total of 18 soil concrete mixtures was prepared. The flow of the soil concrete tended to increase with the increase in W/B and B/S, regardless of the type of soils. The compressive strength was commonly higher in sandy soil concrete than in clay soil concrete with the same mixture condition. Considering the high-workability and compressive strength development, it could be recommended for low-cement soil concrete to be mixed under the following condition: B/S of 0.35 and W/B of 175%.

본 연구에서는 산업부산물을 다량 활용한 소일콘크리트의 유동성 및 강도발현에 대한 결합재-흙의 비(B/S) 및 물-결합재비(W/B)의 영향을 평가하였다. 보통 포틀랜드 시멘트의 부분 치환재로서 바이패스 더스트 10%, 고로슬래그미분말 40%, 순환유동층 플라이애시 25%가 사용되었다. 저시멘트 결합재와 함께 사질토 또는 점성토를 사용하여 18 소일콘크리트 배합이 실험되었다. 실험결과 소일콘크리트의 유동성은 대상토(점성토 또는 사질토)의 종류에 관계없이 동일한 W/B에서 B/S가 클수록 증가하였다. 압축강도는 점성토 콘크리트보다 동일 배합조건을 갖는 사질토 콘크리트에서 컸다. 산업부산물 다량 활용 소일콘크리트의 배합은 압축강도 및 고유동성을 고려하면 대상토에 관계없이 B/S가 0.35 그리고 W/B는 175%가 추천될 수 있었다.

Keywords

References

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