미생물을 활용한 지반개량제의 혼합비율에 따른 사질토의 강도개선 효과
Effect of Mixed Ratios of Ground Improvement Material using Microorganisms on the Strength of Sands
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
본 연구에서는 미생물 반응으로 생성된 탄산칼슘을 분말로 제작하여 연약지반(모래)의 강도 증진 효과를 확인하고자 하였다. 미생물반응으로 생성된 탄산칼슘의 고결화 효과를 분석하기 위해 6가지 case(무처리, 탄산칼슘, 시멘트, 탄산칼슘+시멘트(1:9, 3:7, 5:5))를 모래 중량비에 따라 고결제를 달리(4%, 8%)하여 양생후(7일, 28일) 실험을 하였다. 또한 현장여건과 비슷한 조건의 실험을 하기 위해서 중량비에 따라 세립분(0%, 5%, 15%)를 추가하여 D 5cm × H 10cm 공시체로 성형한 후 일축압축강도를 측정하였다. 그 결과, 중량비와 양생일이 증가할수록 탄산칼슘, 시멘트, 탄산칼슘+시멘트 모두 강도가 증가하는 경향을 확인하였다. 또한 시멘트 강도 대비 중량비 1:9, 3:7, 5:5의 탄산칼슘+시멘트 강도를 비교한 결과 각각 93.5~95.8%, 82.5%, 65.2~70.6%로 나타났다.
Abstract
In this study, the objective of the study is to evaluate the effect of calcium carbonate powder, produced by the microbial reactions, on the strength of soft ground (sand). To analyze the cementation effects of calcium carbonate powder produced by microbial reactions on the strength of the sand, six different types of specimens (untreated, calcium carbonate, cement, carbonate + cement (1:9, 3:7, 5:5)) were made. The specimen were tested after curing (7 and 28 days). Uniaxial compressive strengths were measured on D 5 cm × H 10 cm specimens. Based on the test results, as both the weight ratio and the curing period increase, calcium carbonate, cement, and calcium carbonate + cement specimens showed an increase in the strength. In addition, compared with the strength of the specimen with cement, the strengths of the specimens with mixing ratios of 1:9, 3:7, and 5:5 (carbonate : cement) were found to be 93.5~95.8%, 825.%, 65.2~70.6%.
참고문헌 (20)
- Chang, I., "Strengthening of Korean Residual Soil with b-1,3", 1,6-glucan Biopolymer, 2012, pp.30, 30~35
- Dejong, J. T., "Microbially Induced Cementation to Control Sand Response to Undrained Shear", Journal of Geotechnical and Geoenvironmental Engineering, 132(11), pp.1381~1392 (2006)
- Dejong, J. T., "Bio-mediated Soil Improvement", Journal of Ecological Engineering, 36, pp.197~210 (2010)
- Fei, H. C., "The Characteristics of Liquefaction of Silt Soil", Ground Improvement, 8(1), pp.1~5 (1991)
- Kim, D. H., "A Novel Approach to Induce Cementation of Loose Soils", Advanced Science Letters, 9, pp.545~550 (2012)
- Kim, D. H.., "Injection Effect of Bio-Grout Soft Ground", Advanced Science Letters, 19, pp.468~472 (2013)
- Social Cost-benefit Analysis of Lapaz-Hanla Limestone Development Project, "Kwak, T. W.", Ministry of Environment, 1~49 (2003)
- Law, K. T., "Liquefaction of Granular Soils with Non-cohesive and Cohesive Fines", Proceedings of the 10th World Conference on Earthquake Engineering, pp.1491~1496 (1992)
- 이종휘, "친환경 유기산 재료를 활용한 지반개량 공법의 현장 적용성 평가", 한국지반공학회논문집, 28(9), pp.85~95 (2012), 한국지반공학회
- Mitchell, J. K., "Biological Considerations in Geotechnical Engineering", Journal of Geotechnical and Geoenviromental Engineering, 131(10), pp.1222~1233 (2005)
- Paassen, L. A., "Scale Up of Biogrout: A Biological Ground Reinforcement Method", Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering, pp.2328~2333 (2009)
- Park, B. G, "Evaluation Methods of Weathering Degree for Korean Decomposed Granite Soils", Journal of Korean Geotechnical Society, 15(1), pp.127~141 (1999)
- Park, K. H., "Strength Improvement of Soft Soil using Soft Soil", 석사, pp.2011
- 박경호, "Bacteria를 이용한 실트와 모래의 고결화에 따른 탄산칼슘 확인", 한국지반공학회논문집, 28(6), pp.53~61 (2012), 한국지반공학회
- 박경호, "Bacteria로 처리된 모래지반의 강도 및 주입효과", 한국지반공학회논문집, 29(2), pp.65~73 (2013), 한국지반공학회
- Park, S. K., "A Study on Characteristics of Soil-Cement with Fine Contents", 석사, pp.2010
- 박성식, "식물추출액을 이용한 지반 고결제 개발", 한국지반공학회논문집, 28(3), pp.67~75 (2012), 한국지반공학회
- 박성식, "수침이 고결모래의 강도에 미치는 영향", 대한토목학회 논문집C, 29(6), pp.303~311 (2009), 대한토목학회
- Ng Wei Soon, "Improvements in Engineering Properties of Soils through Microbial-Induced Calcite Precipitation", KSCE Journal of Civil Engineering, 17(4), pp.718~728 (2013), 대한토목학회[DOI]
- Whiffin, V. S., "Microbial Carbonate Precipitation as a Soil Improvement Technique", Geomicrobiology Journal, 24, pp.1~7 (2007)