• 국제초고층학회논문집
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• 제6권2호
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• pp.149-163
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• 2017

With the intensification of urban development in Chinese cities, mixed land use in urban centers extends vertically into 3-D and expands its scale from a single building to commercial clusters. The multi-level pedestrian system in city centers also changed its role from one of traffic isolation to spatial integration, where transit nodes, street sidewalks, squares, building entrances, atriums, and corridors are interconnected, both horizontally and vertically, into a whole spatial system, within which pedestrian flows are guided and shopping facilities are arranged. This paper uses spatial configuration analysis of space syntax to examine the impacts of spatial patterns on movement distribution and the business performance of tenant mix in the multi-level commercial system of the Nanshan Commercial Cultural District in Shenzhen, China. The key objective is to better understand the interactions between the socio-economic variables and spatial design parameters of a shopping complex. The research findings point to the importance of multiplicity between syntactic variables and other spatial variables in influencing the pedestrian flows, business performance and tenant mix in highly complex commercial systems. Particularly noteworthy is the relationship between spatial accessibility measures and the location of escalators, and the ways in which individual commercial buildings are embedded into the overall spatial system. The study suggests that this may lead to the preliminary identification of the spatial qualities of effective vertical extensions of mixed land use in a high-density urban settings.

• 한국산학기술학회논문지
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• 제12권9호
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• pp.4199-4204
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• 2011

아스팔트 혼합물의 동탄성계수는 포장체의 내구성 및 공용성을 평가하는데 매우 중요한 지표이다. 최근 미국의 AASHTO 2002 설계법 및 한국형 포장설계법에서도 아스팔트 포장체의 가장 중요한 물성중 하나를 동탄성계수로 정의하였고, 이를 아스팔트 포장의 설계 및 해석에 적극 이용하고 있다. 동탄성계수를 설계에 이용하기 위해서는 마스터곡선을 작성하여야 한다. 마스터곡선은 각각의 아스팔트 혼합물을 이용하여 평가된 동탄성계수 값을 이용하여 결정한다. 마스터곡선을 결정하는 방법은 표준화되어 있으나, 저온영역(-10도)에서는 시험장비 계측장비의 결로로 인한 측정오차 및 고온영역(55도)에서는 아스팔트 바인더의 유체화 및 실험기기 세팅상의 문제들이 발생하여 측정 결과값에 큰 영향을 준다. 따라서, 이러한 온도대역의 자료를 제외한, 5도, 21도 및 40도에서 측정된 결과값을 이용하여 마스터곡선을 작성 및 분석하였고, 이를 기존의 표준방법으로 결정한 마스터곡선과 비교하였다. 본 연구에서 제안된 방법을 이용하여 결정된 마스터곡선은 고온영역에서 차이가 있기는 하지만, 충분히 사용가능한 것으로 판단되었다.

• 콘크리트학회논문집
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• 제23권4호
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• pp.487-494
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• 2011

이 연구에서는 알칼리 활성화 시멘트 모르타르에 대한 결합재로서 바텀애쉬의 적용성을 평가하였으며, 배합 구성에 따른 재료 특성 변화를 파악하기 위한 실험을 수행하였다. 바텀애쉬를 사용한 알칼리 활성화 시멘트 모르타르 실험에서는 물/바텀애쉬 비, 활성화제/바텀애쉬의 비, 수산화나트륨에 대한 규산나트륨의 비, 양생 온도, 바텀애쉬의 분말도를 주된 실험 변수로 하여 유동성과 강도 실험을 수행하였다. 그 결과, $60^{\circ}C$ 고온 양생을 할 경우에는 적절한 유동성과 함께 40 MPa 이상의 압축강도를 얻을 수 있음을 확인하였으며, $20^{\circ}C$ 상온 양생 시에도 초기 강도 발현은 매우 느리지만 재령 28일 강도 30 MPa 정도가 발현되었다. 또한 실험 결과로부터 바텀애쉬를 사용한 알칼리 활성화 시멘트 모르타르의 적정 최적 배합 범위를 도출하였으며, 이와 함께 실험 결과를 바탕으로 인공신경망 분석법을 적용하여 배합 구성 변화에 따른 유동성 및 압축강도의 변화를 예측하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 가을 학술발표회 논문집
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• pp.555-560
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• 2002

The structure of Chosun-ilbo Boopyung factory was desined as exposed concrete. The self compacting concrete(non-vibrating concrete) must be applied to this case because the exposed concrete wall is very thin(200mm) and high(6m), Laboratory tests and semi mock-up test were performed for optimum mix design of the self compacting concrete. As a result, the optimum mixes were observed at the 3-component types(ope, fly-ash, slag powder) that Vp$\geq$0.175, Vw/Vp$\geq$0.95, W=170~175$kgf/m^3$ and B=500~540$kgf/m^3$ Based on this result. we make plan that the pilot productions of batcher plant, the full-scale mock up tests and site application.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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• pp.681-686
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• 2001

The purpose of this study is to provide the optimum mix design of concrete to be placed at the face slab concrete in CFRD(Concrete Faced Rockfill Dam) for pumped storage power plants. The basic performance tests including compressive strength, modulus of elasticity, flexural strength and the control properties of crack including plastic shrinkage, drying shrinkage were conducted for concrete using fly ash and polypropylene fiber. From this study, the fly ash concrete represented the better results in the aspects of basic performance, control properties of crack and economy than ordinary portland cement concrete. Especially the concrete mix design containing 20% of fly ash is recommended to be applied in the construction of the face slab concrete in CFRD for pumped storage power plants.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 봄 학술발표회 논문집(I)
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• pp.619-624
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• 1999

The purpose of this study is to provide the optimum mix design of fly ash concrete to be placed at the concrete face rockfill dam for pumped storage power plats. The basic performance tests including compressive strength, modulus of elasticity, unit weight, coefficient of thermal expansion, shrinkage, adiabatic temperature rise and analysis of thermal stress were conducted for fly ash concrete. From this study, the fly ash concrete represented the better results in the aspects of basic performance and economy than ordinary portland cement concrete. Especially the concrete mix design containing 15% of fly ash is recommended to be applied in the construction of the concrete face rockfill dam for pumped storage power plants.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 봄 학술발표회 논문집(I)
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• pp.463-468
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• 1999

The slurry wall of Inchon LNG receiving terminal tank will be planned the super flowing concrete having properties of high strength (required strength 520kg/$\textrm{cm}^2$), no-vibrating and massive structure in the underground. For the performance of this concrete, we investigate and select all materials, the optimum mix design and sensibility test in the laboratory. As test results, we choose portland blast-furnace slag cement and lime stone powder(L.S.P) as cementitious materials, W/C 41%(W/B 35.4%), S/a 50.8% and unit volume of coasre aggregate 0.30 as optimum mix design. Also test result of the fresh and hardened concrete are satisfied with specifications of slurry wall.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.165-167
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• 2011

This study is to evaluate the feasibility of the mix design for exposed concrete. Mock-up sized specimens were prepared, and a flowing concrete method was selected for placement. Results showed that the fluidity and air content of fresh concrete achieved target values, the compressive strength at 7 days was 27 MPa, and surface roughness was in the range of between around 1.53 and 1.68 ㎛, which was in the quality level. Therefore it is concluded that the proposed mix design for exposed concrete can be applied in practice.

• 한국패션뷰티학회지
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• 제4권2호
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• pp.6-14
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• 2006

The purpose of this study is to examine how the Chanel Collection, a famous brand acknowledged for it's modern style, was influenced by post-modernism. The scope of research includes initial concentration on 1920's boyish style of Chanel as well as its relative influence on modernism. Secondly, the research concentrates on Chanel Collections that Lagerfeld's designs were best represented. The results were as follows: The tendency to eroticism for fashion business, tendency to retro-fashion, tendency to popularization of sub-cultural group's fashion, tendency to no-match-mix, tendency to androgynous style, tendency to emphasis on ornaments in clothing.

• 한국도로학회논문집
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• 제14권5호
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• pp.67-74
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• 2012

PURPOSES: In this study the influence factors related to abrasion resistance of interlocking concrete block have been evaluated, and comparisons between various domestic and foreign abrasion test methods was also accomplished. METHODS: The modified rotational cutting method suggested in ASTM C 944 was applied. Surface materials with different types of fine aggregate such as crushed sand, sea sand, and mixture of crushed and sea sand were tested to compare the aggregate effect for abrasion resistance. RESULTS: The different surface mixtures with various W/C ratios, mortar and fly ash ratios have been investigated for functional and economical considerations. CONCLUSIONS: This study had obtained reliable results by changing diamond blade of rotating cutter. Therefore, in order to improve the abrasion resistance of interlocking concrete block for road, a new mix design was proposed.