초록 ▼

○ 해양 구조물 보수에 적합한 고성능 숏크리트 재료
- 28일 38.4MPa, 염분침투저항성 703Coulombs 확보
- 내구수명 77년 염해저항성 확보
- 동결융해저항성 84% 이상, 표면박리 1등급(박리량 0.19kg/m²) 확보
○ 해양구조물용 보수용 장비개발
- 해양구조물 보수용 워터젯장비 개선하여 수중 및 육상 워터젯 가능함
- 해양구조물 보수용 Mobile Cofferdam 실물제작 및 실제 사용성 평가함
○ 해양구조물용 보수공법 시험시공 결과
- 워터젯 시

○ 해양 구조물 보수에 적합한 고성능 숏크리트 재료
- 28일 38.4MPa, 염분침투저항성 703Coulombs 확보
- 내구수명 77년 염해저항성 확보
- 동결융해저항성 84% 이상, 표면박리 1등급(박리량 0.19kg/m²) 확보
○ 해양구조물용 보수용 장비개발
- 해양구조물 보수용 워터젯장비 개선하여 수중 및 육상 워터젯 가능함
- 해양구조물 보수용 Mobile Cofferdam 실물제작 및 실제 사용성 평가함
○ 해양구조물용 보수공법 시험시공 결과
- 워터젯 시공성평가 결과 기존공법 100 대비 20.8공기소요
- Mobile Cofferdam 시공성 평가 결과 기존공법 100 대비 55.6공기소요
- 공법화평가 결과 육상공법 대비 90% 효율 확보

(출처 : 요약서 3p)

Abstract ▼

Purpose & Contents
[Purpose]
○ Development of high performance shotcrete materials suitable for repairing marine structures
○ Development of advanced high pressure spraying equipment for damaged underwater concrete cutting
○ Development of maintenance system and construction method for m

Purpose & Contents
[Purpose]
○ Development of high performance shotcrete materials suitable for repairing marine structures
○ Development of advanced high pressure spraying equipment for damaged underwater concrete cutting
○ Development of maintenance system and construction method for marine concrete structures using high-performance shotcrete
○ Field application test and evaluation

[Contents]
○ Development of high performance cellular shotcrete maintenance materials and verification of long-term durability
- Development of a material that satisfies at least 35 MPa on 28th day and has a chloride ions penetration resistance of 1,000 Coulombs or less
- Durability 50 years or more to ensure resistance to salt
- Freeze-thaw resistance of 80% or more, scaling resistance grade 1(amount 1kg/m²)
○ Development of equipment system for marine concrete structure
- Improvement of water jet system for marine concrete structure
- Development of Mobile Cofferdam System
○ Development of equipment system Mock-up Test
- Optimal manpower and improved mechanized shotcrete systems
- Verification of the construction method t
- hrough commercialization test construction
○ Securing intellectual property

Results
○ High performance shotcrete materials suitable for repairing marine structures
- 38.4 MPa on 28th, chloride ions penetration resistance of 784 Coulombs
- Securing Salt Sea Resistance in 77 Years of Durability
- Freeze-thaw resistance of 84% or more, scaling resistance grade 1(amount 0.19kg/m²)
○ maintenance method test construction result for marine concrete structure
- As a result of the waterjet construction evaluation, it took 20.8% construction period compared to the existing construction method 100%.
- As a result of the mobile cofferdam construction evaluation, it took 55.6% construction period compared to the existing construction method 100%.
- As a result of evaluating the construction method, 90% efficiency is secured compared with the land construction method.

Expected Contribution
○ Maintenance of coastal concrete structures damaged by salting
- High-pressure water spraying (Hydro-demolition) technology is used to remove the deteriorated surface of coastal concrete structure, then shotcrete construction method is used without formwork to enhance promptness and safety followed by concrete pouring with excellent watertightness and salt resistacne.
○ Maintenance of marine concrete structures eroded by waves and seawater
- Development of water jet and shotcrete construction method to crush and maintain underwater structures deteriorated by mobile hydrodemolition rig and mobile cofferdam method
○ Maintenance of Underwater Concrete Structures Using submersible construction robot
- Utilization of submersible construction robots in various categories such as domestic offshore wind farm, offshore plant, marine carbon capture and storage facility (CCS), sea-level civil engineering construction prospect, installation and maintenance of submarine cables and underwater structures, pipeline construction for offshore CCS
○ Maintenance and aesthetic improvement of concrete structures
- After shotcrete, carving the natural rock pattern to improve the aesthetics
○ Securing workability by applying shotcrete method
- Since the shotcrete method is used when constructing the slope structure such as an offshore structure, it is possible to perform the construction instantaneously because the shape of the structure is not restricted and the installation of the formwork is not required

(출처 : SUMMARY 5p)

목차 Contents

• 표지 ... 1
• 제출문 ... 2
• 보고서 요약서 ... 3
• 국문 요약문 ... 4
• SUMMARY ... 5
• Contents ... 7
• 목차 ... 8
• 제1장. 연구개발과제의 개요 ... 9
• 1. 연구개발 목적 ... 9
• 2. 연구개발의 필요성 ... 12
• 3. 연구개발 범위 ... 13
• 제2장. 국내외 기술 개발 현황 ... 17
• 1. 수중 구조물 피해 및 국내 보수보강 공법 ... 17
• 2. 수중 콘크리트 및 장비 관련 국내외 현황 ... 19
• 3. 숏크리트 재료 관련 기술 ... 21
• 제3장. 연구 수행 내용 및 성과 ... 24
• 1. 1차년도 ... 24
• 2. 2차년도 ... 68
• 제4장. 목표 달성도 및 관련 분야 기여도 ... 125
• 1. 목표 달성도 ... 125
• 2. 관련 분야 기여도 ... 126
• 제5장. 연구개발성과의 활용계획 ... 132
• 1. 연구개발 성과의 활용방안 ... 132
• 2. 사업화 ... 135
• 제6장. 연구 과정에서 수집한 해외 과학기술 정보 ... 150
• 제7장. 연구개발성과의 보안등급 ... 151
• 제8장. 국가과학기술종합정보시스템에 등록한 연구시설·장비 현황 ... 152
• 제9장. 연구개발과제 수행에 따른 연구실 등의 안전 조치 이행 실적 ... 153
• 1. 기술적 위험요소 분석, 안전 관리 대책 ... 153
• 제10장. 연구개발과제의 대표적 연구 실적 ... 155
• 제11장. 기타 사항 ... 156
• 제12장. 참고 문헌 ... 157
• 별첨#1. 고성능 셀룰러 숏크리트 Mock-up test 공인기관 성적서 ... 159
• 별첨#2. 논문 및 특허 증빙 ... 168
• 별첨#3. 해양 콘크리트 구조물 보수·보강 공법 특별시방서 ... 197
• 끝페이지 ... 207