Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Basic Study on Development of Eco-Friendly Vegetation-Block

친환경 식생블록 개발을 위한 기초연구

  • Heo, Yol (Department of Civil Engineering, Chungbook National University) ;
  • Oh, Sewook (Department of Construction and Disaster Prevention Engineering, Kyungpook National University) ;
  • Bang, Seongtaek (Eco-Friendly Technology Research Center, Kyungpook National University)
  • Received : 2014.01.29
  • Accepted : 2014.03.17
  • Published : 2014.04.01
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Abstract

With a view to resolving environmental problems of hazardous cement, this study seeks to identify the unconfined compressive strength and bending strength of the vegetation block designed herein by utilizing high-strength natural soil stabilizer instead of cement. Soil stabilizer is mainly made of mixture of short fiber extracted from natural fiber and lime, etc. Soil stabilizer reinforces the shearing strength of soil to improve block supportive power and durability while preventing flood and frost damages. For the unconfined compressive strength test, test pieces were prepared by mixing soil stabilizer and weathered soil in different ratios of 6 %, 12 % and 18 %. Experiments were carried out according to curing periods of 5th, 7th, 14th and 28th of the day. For bending strength test, blocks were made in the same mixture ratios as for the unconfined compressive test and tested for each stage. Also, to evaluate for the field applicability, proposed optimum water content considering the characteristics of the soil stabilizer. Permeability test result for the vegetation block, satisfied by the KS F 4419 quality standards.

본 연구에서는 시멘트의 유해성을 극복하기 위하여 시멘트 대신에 친환경 토양안정재를 사용한 식생블록을 제작하여 압축강도 및 휨강도 특성을 규명하였다. 식생블록 제작에 사용된 토양안정재는 천연섬유에서 추출한 단섬유와 석회 등을 주원료로 하며 흙의 전단강도를 증가시켜 블록의 내구성을 향상시키면서 식생을 가능하게 하는 특징을 가지고 있다. 일축압축강도 시험을 위한 공시체는 토양안정재와 화강풍화토를 혼합하여 제작하였으며, 토양안정재는 혼합토의 중량대비 6 %, 12 %, 18 %로 변화시켜 물과 교반하였다. 공시체는 공기 중에서 건조하여 각각 5일, 7일, 14일, 28일간 양생시키고 일축압축강도 시험을 수행하였다. 휨강도 시험은 일축압축강도 시험과 동일한 조건으로 블록을 제작하여 각 단계별 휨강도 시험을 실시하였고 현장 적용성 평가를 위하여 토양안정재의 특성을 고려한 최적함수비를 제안하였다. 또한 식생블록에 대한 투수시험 결과 KS F 4419에서 규정하는 투수성 블록의 품질기준을 만족하는 것으로 나타났다.

Keywords

References

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