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Research Interests
Biological approaches to resolve geotechnical issues
Biological approaches to resolve geotechnical issues
Microbially induced carbonate precipitation (MICP, or bio-cementation) is an emerging technology in the area of bio-inspired and bio-mediated geotechnics in part due to its versatile potential, potential economic benefits, and possible ease of implementation. The MICP process is initiated from ureolytic microorganisms which hydrolyze urea and produces carbonate anions. In the presence of calcium, calcium carbonate (CaCO3) is precipitated improving the soil’s strength and stiffness. Sustainable Geotech Lab focuses on the following topics:
Use of sea water and its effect on bio-cementation
Erosion Mitigation using bio-cementation
Minimal construction or constructionless approach using bio-cementation
Seabed improvement
Reuse of waste materials
Reuse of waste materials
There are tremendous wasting materials abandoned around coastal areas such as oyster shells, fishing fabrics, etc. These wastes not only distract the view of cities but also environmentally harmful. However, such wastes can be re-born as construction materials with some processes. Shells, consisting of calcium-based minerals, are a natural material. They can be shredded and mixed with soils or concrete to enhance the engineering properties. Fishing fabrics (net, roof, etc.) have excellent tensile strength. If the fabrics are mixed with soil, these materials can compensate for tension, which is the weak point of soils.
Soil reinforcement using geocell
Soil reinforcement using geocell
A geocell is a geosynthetic with a lattice shape (cell) by several plastic bands at regular intervals. Due to the three-dimensional structural characteristics of geocells, the fill material trapped inside the geocell is horizontally restrained against the upper load. As a result, the geocell redistributes the upper load to the lower ground, thereby improving bearing capacity.
To elucidate the mechanism of the reinforcement by geocell, our lab constructed a large-scale soil box and is performing a series of load tests.
Grants
2024/05-2025/03
강관파일 거동 수치해석 (Numerical anaylsis on behavior of steel pipe)
(주)다현이엔지
22,264,000KRW
2024/05-2024/10
경남 패류부산물산업화를 위한 예비 연구 과제 발굴/경남 패류부산물산업화를 위한 실증 사업 계획 수립 (Preliminary study on application of oyster shells)
경남 과학기술 혁신 연구회, 경남테크노파크
11,000,000KRW
2022/11-2023/03
지오셀을 이용한 도로노반 개량 기술 개발(Roadbed improvement by geocell)
울산경남 스마트플렛폼사업단
50,000,000KRW
2022/09-2023/08
신진교수 연구비 지원(Research grant for new faculty)
경상국립대학교(GNU)
6,000,000KRW
2022/03/28-2022/04/22
삭초 예산 절감 기술 현장 지원(Devegetation near road shoulder by bio-cementation)
Korea Expressway Corporation
8,800,000KRW
2022/03/28-10/14
폐어망 혼입 지반보강체 강도 시험분석 용역 2차년도(Lightweight soil reinforced by waste fishing net - 2nd year)
한국해양과학기술원(Korea Institute of Ocean Science and Technology, KIOST)
30,000,000KRW
2021/12/06-2022/01/07
인공함양지 투수성 분석 분석 용역(Permeability analysis for artificial reservoir)
동일기술공사
5,500,000KRW
2021/12/01-2022/04/30
미생물·효소를 이용한 비포장도로 개량체의 강도 시험분석 용역(Unpaved road improvement by microbes and enzyme)
KICT
18,900,000KRW
2021/11/01-2022/04/30
미생물을 활용한 도로 갓길 삭초 예산 절감 기술 개발(Devegetation near road shoulder by bio-cementation)
지자체-대학 협력기반 지역혁신 사업, 경상남도(Gyeongsangnamdo) and 교육부(Ministry of Education)
170,000,000KRW
2021/07/01-12/31
미생물을 이용한 해상풍력기초 지반처리 기술(Soil improvement for offshore foundation system using microbes)
기획연구(planning project), 한국건설기술연구원(Korea Institute of Civil Engineering and Building Technology, KICT)
15,000,000KRW
2021/06/01-2024/05/31
미생물과 염수를 활용한 연안 침식 저감 기초 연구(Preliminary study of coastal erosion mitigation using microbes and salt water )
지역대학우수과학자지원사업, 한국연구재단(National Research Foundation, NRF), 교육부(Ministry of Education)
150,000,000KRW
2021/03/31-09/30
폐어망 혼입 지반보강체 강도 시험분석 용역(Lightweight soil reinforced by waste fishing net)
한국해양과학기술원(Korea Institute of Ocean Science and Technology, KIOST)
20,000,000KRW
2020F-2021S
해수와 미생물을 이용한 지반처리(Soil Improvement using Microbes and Salt Water)
경상국립대학교 신임교원 육성지원(GNU)
10,000,000KRW
2018/06-11
해외 젊은 과학인 소그룹 모임 지원(Supportive funds for young Korean scientist and engineer overseas)
한국과학기술단체총연합회(The Korean Federation of Science and Technology Societies, KOFST)
5,000,000KRW
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