• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.8-9
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• 2021

FCP requires different curvatures and shapes according to the method of division, and it is necessary to manufacture a formwork accordingly. FCP production equipment consists of CNC equipment and side shape control equipment. This can be implemented in various shapes of upper, lower, and side surfaces. In the side shape control equipment, it is implemented as a variable side formwork. Among the required performance of the variable side formwork, there is stiffness against side pressure, which needs to be verified. Therefore, in this study, the FCP fabrication experiment is conducted with the developed variable side formwork. By analyzing the error in the shape of the fabricated FCP, the lateral pressure resistance capability of the side form is measured and verified.

• International conference on construction engineering and project management
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• 2017.10a
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• pp.183-191
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• 2017

In building project, client needs to decide many things, and clients cooperate with architects, supervisors, general contractors and other consultants. Especially in construction phase, clients often make a decision. However, client's decision-making in construction phase often makes some kinds of risk. This paper aims to clarify the reality of client's decision-making in construction phase. First, client's decision-making is defined by laws and standards. Second, the questionnaire revealed the current status of client's decision-making in 4 works. Third, Fishbone diagram shows the factors of client's decision-making in four works. Finally, it was modeled how client's decision-making in construction phase affects the post-process of 4 works.

• International conference on construction engineering and project management
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• 2015.10a
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• pp.21-22
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• 2015

Productivity has been a wide-ranging challenge for the construction industry, both in Australia and globally. Particularly in Western Australia's construction and resources sectors, continuously low productivity will potentially discourage future investments. The emergence of the global marketplace necessitates that the supply chain needs to focus on the concept of the holistic efficiency. The isolated geographical position of Australia only exacerbates this phenomenon. In recent years, Building Information Modelling (BIM) has been suggested as an efficient way to help productivity improve and information management throughout supply chains. This keynote talk will focus on discussing ways of implementing BIM to enhance site productivity focusing on Western Australia's construction projects. It will show new trends of its applications to accomplish an innovative way in construction project management. The talk will also give an insightful summary of integrated methods with state-of-the-art technologies backboned by the BIM cases from construction and oil and gas industry projects.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.11a
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• pp.161-162
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• 2023

Limestone slag cement is a green and sustainable building material with huge market potential. However, its shortcoming of low early compressive strength needs to be improved. A method of using aluminum sulfate to improve the early strength of ternary mixed mortar was proposed, and its effect and optimal dosage were tested. Macroscopic properties such as mechanical properties and surface electrical resistivity were measured at different dosages (0%, 1%, 2%, 3%). The microstructure and products of the mixtures were tested in detail, including by scanning electron microscopy, thermogravimetric analysis, and X-ray diffraction. The results show aluminum sulfate enhances mechanical properties and significantly increases surface electrical resistivity. The 1% and 2% doses had no adverse effects on the 28-day mechanical properties, while the 3% dose reduced the 28-day strength. Considering the changes in mechanical properties and surface electrical resistivity, 1% aluminum sulfate is the optimal dosage.

• Journal of the Korean housing association
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• v.16 no.4
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• pp.101-108
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• 2005

Because of the airtightness of building, misuse of building materials and abuse of furniture, indoor air pollution problems have been increasingly concerned especially with apartment buildings. To improve the IAQ(Indoor Air Quality) in apartment building, this study was aimed at analyzing the factor of interior building material and furniture and calculating the ventilation rate of living room and bed room according to the surface area of interior building material and furniture in terms of VOCs(Volatile Organic Compounds) and HCHO(Formaldehyde). The results of this study are as follows; 1) In the concerned rooms, the living room has less pollution emission rate L(surface area/volume) than that of the bed room but, the living room needs more ventilation rate than that of the bed room because of built-in furniture in terms of VOCs and HCHO. 2) Built-in interior furniture is very important factor in IAQ problems of apartment building, but until now there is no provision about the built-in furniture, so that the provision must be regulated to control the IAQ. 3) To control the IAQ problem, the effective ventilation plans must be established according to the required ventilation rate by means of natural or mechanical ventilation method.

• Korean Journal of Computational Design and Engineering
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• v.21 no.4
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• pp.378-388
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• 2016

As the needs for the mega-sized, high-rise and irregular shape of building increase, domestic application of BIM in construction industry is increasing in recent years. In this circumstance, interests in BIM modeling and modeling detail level have been also increased. BIM that is based on a three-dimensions, requires a specific and precise building expressions. And model expression level required for each phase such as design, construction, and maintenance of the construction project could be different as its needs. Because that it is not clear to define the criteria for the expression level of construction BIM model, It is difficult to decide how detail and what to model is appropriate in the practical application of BIM model. It could be the reason why the productivity in construction project became lower and lower. In this study we consider the way how to improve the productivity of BIM and analyze the appropriate representation level of construction BIM model through the experts' survey. The results of study could suggest the basis for an appropriate expression level of construction BIM model.

• Journal of the Korean Institute of Landscape Architecture
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• v.32 no.1
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• pp.1-9
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• 2004

This study is focused on finding out the character of urban recreation forest and investigating facilities regulations of forest resources around urban areas to meet future recreation needs. The method of this study is to compare urban recreation forests with similar facilities like urban parks and natural recreation forests. By this way, this study not only identifies the characteristics of urban recreation forest as emerging recreational facility, but also outputs regulations that can be adapted to real environment. Urban recreation forest is defined as follows: It has forest with good natural landscape and easy access. It makes emotion rich and its function is focused on outdoor recreation nature education, and experiences for family group mainly within a day or on weekends. This study suggests that the minimal area of urban recreation forest should be over 100,000$m^2$, with a facility ratio less than 20%. Building coverage should be less than 7% when the urban recreation forest is under 300,000$m^2$, less than 5％ when 300,000∼500,000$m^2$, and less than 3％ when over 500,000$m^2$ The limits of building height is 3 stories, or under 12m. This study finds out the character, the needs of urban recreation and the criterion for project feasibility. significance of the result is supplying theoretical basement on related regulation. Based on the results, further study will establish landscape management method and legislation & application in a detailed examination.

• Journal of the Korea Institute of Building Construction
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• v.8 no.1
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• pp.49-56
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• 2008

According to the recent trends which are the diversity of customer requests and the multi-function of buildings, A construction company's business has converted from the producer-oriented approach to the consumer-oriented approach. Therefore, each construction company is continuously trying to improve the quality level as a way of corresponding to customer needs in these changing situations. The quality is one of the main management targets which judge the success of a project along with the schedule, the cost and the safety. As construction companies execute the quality management which they aimed at, it should be completed within the optimum schedule and the limit of the budget. Accordingly, the importance of the construction site management to complete a project is continuously increasing. The construction site management is the systematic method to perform the project goals such as the quality improvement, the cost saving and the safety management, which organically operate one another, by procuring the manpower, the material and the machine in the right time. Specially, as the construction industry has based on the construction site, the establish of systematic construction site management, which can effectively correspond sudden changes of the construction business environment, is essential to maximize the construction productivity. On top of that, the necessity of the quality management method is increasing to accommodate customer needs more spontaneously in the construction site. These endeavors could guarantee their competitive power.

• Korean Institute of Interior Design Journal
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• v.14 no.1
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• pp.109-117
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• 2005

The women's roles In 21s1 century in Korea is increasing as the industry, economy is growing and changing rapidly; thus raising the necessity and importance of early learning. Naturally the importance and needs of children's day-care center is increasing both in quantitative and quality matters, there needs for much improvements. This study selected 8 workshop day-care centers in Seoul area, where most day-care centers are located, and analyzed interior spaces; thus presenting the appropriate model of interior space in child day-care center. Starting with, examining theologically, this study focused on the history of child day-care center and the 8 selected day-care centers in Seoul. By analyzing the operation status, blue prints, and picture, this study focused on improving the interior spaces in day-care centers. The presented improvement in spaces are the fellowing, First, half of day-care centers in workshops had independent buildings and most were multi-storey building. Second, running status vary. The open hours and number of teachers were fine but the budgets ratio of the employer and the worker ratio needed improvements. Third, there is need for detailed more improvement In managing area, educational area, and service area. It recommendable for spaces of day-care centers in workshops to be a single-storey building with managing and service space placed In center with educational rooms on each sides, with single hall way.

• The Journal of the Korea Contents Association
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• v.9 no.1
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• pp.15-22
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• 2009

This paper describes design and implementation of a Web-based information service that supports management and retrieval of use cases for earth-related materials in traditional Korean construction process. Managed data are gathered from old traditional books which are written in Chinese characters. Development needs to consider providing users effective interface to retrieve information from the service easily. Gathering and analysis of earth-related data are processed in parallel to the database construction. Data store and management needs to be flexible enough. This paper introduces several design and implementation issues for the developed service, and proposes solutions for the them.