• Magazine of the Korea Concrete Institute
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• v.14 no.5
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• pp.27-30
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• 2002

ACS(Automatic Climbing System) 거푸집은 당 현장에서 코어 월 철근 콘크리트 공사시 사용되는 대형 거푸집으로써 상대 플로우 잭에 의해 자동으로 1개 층씩 상승되는 시스템으로 안전난간 및 안전발판을 설치하여 추락, 낙하재해에 대비하였으며 외부에 천막을 설치하여 비산먼지, 소음 등을 방지할 수 있도록 설치/운영 중이다. (그림 1)은 ACS 거푸집의 구성을 나타내었다.(중략)

• Magazine of the Korea Concrete Institute
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• v.22 no.2
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• pp.29-33
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• 2010

• Magazine of the Korea Concrete Institute
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• v.14 no.3
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• pp.77-81
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• 2002

경기장의 전체적인 설계 개념은 가장 제주다운 환경, 즉 자연환경을 그대로 유지하면서 가장 친근한 경기장을 표현하고자 (사진 2)와 같은 제주도 전역에 산재되어 있는 358개의 기생화산인 오름을(산굼 부리도 1개의 기행화산임) 형상화하여 표현하였다.(중략)

• Journal of the Korea Institute of Building Construction
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• v.2 no.3
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• pp.103-108
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• 2002

• Journal of the Korea Construction Safety Engineering Association
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• v.2 no.2 s.4
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• pp.9-16
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• 1992

• Journal of the Korea Institute of Building Construction
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• v.2 no.4
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• pp.75-79
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• 2002

• Resources Recycling
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• v.10 no.1
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• pp.7-15
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• 2001

We can reuse the portion of simple reclamation and the construction by-products. Until now, we have discarded concrete by simply throwing away or dumping in underground. Therefore, we attempted to propose the technical directions for the reuse of waste concrete as the recycled concrete aggregates and concrete structural materials. As a testing result, It is reasonable that standards are substitution of recycled aggregates under 30%, maximum steel ratio, under 70% of balanced steel ratio, under shear span ratio 0.2 for deep beam criteria for safety and Zsutty's equation is reasonable for estimation of factored shear strength

• Korean Journal of Construction Engineering and Management
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• v.23 no.2
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• pp.45-53
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• 2022

The purpose of this study is to present a model for analyzing construction errors of reinforced concrete pile foundations using drones. First, a drone is used to obtain an aerial image of the construction site, and an orthomosaic image is generated based on those images. Then, the circular pile foundation is automatically recognized from the orthomosaic image by using the Hough transform circle detection method. Finally, the distance is calculated based on the the center point of the reinforced concrete pile foundation in the overlapped data. As a case study, the proposed concrete concrete pile foundation construction quality control model was applied to the real construction site in Incheon to evaluate the proposed model.

• Journal of the Korea Concrete Institute
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• v.18 no.3 s.93
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• pp.425-429
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• 2006

Horizontal cracks at the mid-depth of concrete slabs were observed at a section of the continuously reinforced concrete pavement(CRCP) structures on the Korea Highway Corporation's Test Road. To investigate the existence and the extent of horizontal cracks in the concrete slab, a number of cores were taken from the section of CRCP. To identify the causes of horizontal cracks, numerical analyses were conducted. Several variables relative to design, material, and environment were considered in the studies to evaluate possible causes of horizontal cracking. A numerical model of CRCP was developed using the finite element discretization, and the shear and normal tensile stress distributions in CRCP were investigated with the model. Numerical analysis results show that the maximum shear and normal tensile stresses develop near the depth of steel bars at transverse cracks. If those maximum stresses reach the strength of concrete, horizontal cracks occur. The maximum stresses become higher as the environmental loads, coefficient of thermal expansion of concrete, and elastic modulus of concrete increase.

• Magazine of the Korea Concrete Institute
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• v.5 no.3
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• pp.107-115
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• 1993

최근 건설공사의 급증으로 인한 하천골재의 고갈로 콘크리트용 대체골재로서 해사\ulcorner선사 등이 대구되고 있다. 그러나 해사는 세척하지 않고 그대로 콘크리트에 사용할 경우 콘크리트중의 철근부식 촉진에 따른 콘크리트의 균열발생 등 조기 노후화현상으로 내구성에 많은 문제점을 내포하고 있고, 산사는 국내 연구실적이 전혀 없는 상태에서 지역적으로 무분별하게 사용되고 있어 이들에 관한 제반 공학적 특성 및 활영방안 연구가 시급한 실정이다. 따라서 본 연구는 산사\ulcorner해사를 사용한 콘크리트의 압축강도 특성 및 해사의 염분함량과 콘크리트의 물-시멘트비에 따른 철근부식량과의 관계를 구명하였다.