• Advances in environmental research
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• v.1 no.1
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• pp.83-96
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• 2012

The water sludge is generated from the treatment of water with alum. Disposing of sludge again to the streams raises the concentrations of aluminum oxides in water, which has been linked to Alzheimer's disease. The use of water treatment plant (WTP) sludge in manufacturing of constructional elements achieves both the economical and environmental benefits. Due to the similar mineralogical composition of clay and WTP sludge, this study investigated the complete substitution of brick clay by sludge incorporated with some of the agricultural and industrial wastes, such as rice husk ash (RHA) and silica fume (SF). Three different series of sludge to SF to RHA proportions by weight were tried, which were (25: 50: 25%), (50: 25: 25%), and (25: 25: 50%), respectively. Each brick series was fired at 900, 1000, 1100, and $1200^{\circ}C$. The physical and mechanical properties of the produced bricks were then determined and evaluated according to Egyptian Standard Specifications (E.S.S.) and compared to control clay-brick. From the obtained results, it was concluded that by operating at the temperature commonly practiced in the brick kiln, a mixture consists of 50% of sludge, 25% of SF, and 25% of RHA was the optimum materials proportions to produce brick from water sludge incorporated with SF and RHA. The produced bricks properties were obviously superior to the 100% clay control-brick and to those available in the Egyptian market.

• Journal of the Korea institute for structural maintenance and inspection
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• v.12 no.2
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• pp.83-90
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• 2008

The purpose of this study is to attempt to use broken red brick, which is categorized as impurities of circular aggregate to thick aggregate, as a replacement for concrete. Through the material test and performance test for each mixing rate of the broken red brick (0%, 30%, 60%), the following conclusion was reached by studying the material and structural characteristics of circular aggregate to the concrete. Even though broken red brick, which is categorized as impurities of circular aggregate, is mixed 30% with normal rubble, the compression strength, intensity strength, and curving strength was similar to that of concrete that uses normal rubble. Therefore, concrete beam made with broken red brick can be applied to the real construction field. Also, the study regarding the cutting test of the concrete that uses broken red brick and regarding applying and mixing admixture that can increase the ductility factor will be required in the future.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2006.11a
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• pp.341-345
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• 2006

zArchitect Kim lung-up used free-curved lines as his architectural language. We can categorize his language into 'overlapped curved lines' and 'juxtaposed circles.' We found that his language was expressed well when he applied a specific material, for example, overlapped curved lines - concrete and juxtaposed circles - brick. Furthermore, using the plasticity of concrete, he built roofs and columns in a curved form. He also created reliefs on the walls out of the characteristics of bricks. It can be evidence that he considered forms and characteristics of materials to design buildings. This research mainly focuses on his design method to use free-curved lines with specific materials based on the analyses of forms and materials applied in his architecture buildings and art works

• 한국경영정보학회:학술대회논문집
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• 2007.06a
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• pp.382-387
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• 2007

Since the emergence of Internet service, the revenue from e-commerce has been exponentially growing. Especially, the consumption by men in online retailers is distinctively different from that in traditional bricks-and-mortar retailers. Facing these interesting phenomena, researchers as well as businesses have begun to pay attention to e-commerce and online consumers. However, research on consumer behaviors in the online channel has not made a careful investigation into gender behavioral differences in the online channel. Therefore, we provide a profound understanding of gender differences in online shopping behavior compared to those in offline shopping behaviors. Through our findings from this research, we draw researchers' attention to consumer behavior in the online channel, gender differences in online shopping. Also, we suggest practical implications to online marketers using data collected from one of the major online retailers.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2004.02a
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• pp.96-105
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• 2004

The decommissioning project of the KRR 1 & 2 was started in January 1997. The actual decommissioning activity was started at the RI production facility and was finished at the end of 2002. The dismantling works of all components including the reactor structure of the KRR-2 was started in January, 2003 and will be carried out for 2 years till the end of 2004. The project schedule is estimated to delay for 4∼5 months beyond the original plan because of delaying on the cutting of thermal column nose and removal of the graphite bricks, but it may be caught up during the removal working of concrete from biological shielding structure. This paper summarizes the general status of the KRR 1 & 2 and decommissioning activities.

• Journal of the Korean Institute of Rural Architecture
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• v.4 no.2
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• pp.49-62
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• 2002

The purpose of this study was to investigate and analyze the building process and characteristics of Suncheon American missionary compound-missionary dwellings, medical clinics, schools and churches, for the sake of giving fundamental facts to the researcher of this field. The results of the study is summarized as follows. The construction participants of Suncheon missionary architecture are American supervisor- Rev. Preston, Elder Swinehart and Doctor Timmons, Korean christian labors, Chinese masons and Japanese carpenters. The characteristics of architectures are described as the space composition according to American life style, the architectural form of American colonial style. And also the masonry structure using the Korean domestic stones and bricks and imported various materials- such as the cements, timbers, glasses, doors and windows, etc- from the North America.

• KIEAE Journal
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• v.10 no.3
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• pp.17-26
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• 2010

This study aims at exploring the characteristics of the Usonian houses of Frank Lloyd Wright from an ecological viewpoint. After considering the definition and application of ecological architecture through literature review, 28 Usonian houses were selected and analyzed for the study. Also, nine Usonian houses, which clearly have ecological and historical importance, were visited and more thoroughly analyzed. The result shows that Usonian houses are ecological in terms of 1) the relationship among nature, landscape and house, 2) the orientation, natural light and natural ventilation, 3) the use of natural local materials including wood, stones and bricks, 4) the use of floor heating (the On-dol system inKorea), 5) the human scale, 6) the use of the board and batten unit (an early system of prefabrication), and 7) the openness and flexibility of floor plans.

• Proceedings of the Korea Concrete Institute Conference
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• 2000.10a
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• pp.359-362
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• 2000

From a practical perspective, sustainable development requires the optimization of current natural resources and the minimization of derived wastes. A major concern with respect to sustainable infrastructure development is the continued depletion of easily-available natural resources and environmental matters are more serious, the concerned about waste materials which are inevitably produced in the manufacturing of the product is getting worse. These wastes must be handled and properly disposed, and many times, although this waste may be environmentally inert, it has been discarded in landfills. But current disposal methods of these by-products create not only a loss of profit for the power industry, but also environmental concerns the breed negative public opinion. therefore, this study evaluates the ECO artificial aggregate and bricks were designed and tested for the end use of fly ash.

• KIEAE Journal
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• v.2 no.2
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• pp.45-50
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• 2002

In the last century, mainly our cultures destroyed a lot of ourselves as well as of our natural environment by deterioration, pollution and exploitation. Building activities are for a third responsible for these disasters and they are fully the reason for the growing Sick Building Syndrome. In result, Materials of the building should be derived as much as possible from nature, and walls should be made of yellow soil, or of bricks made from yellow soil The adobe can easily have larger or smaller dimensions, and different thickness as weil, according to the purpose for which they are meant, and the structural load-bearing function they have to fulfill. In spite of the importance of clay, research or experiment of clay has been quite weak. However, in stead of endowing the clay with the value as natural architectural material, we want to evaluate it as an important element of the environment.

• Smart Structures and Systems
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• v.4 no.2
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• pp.153-169
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• 2008

The use of pre-tensioned shape memory alloy (SMA) wires to retrofit historic masonry structures is investigated. A small wall, serving as a prototype masonry specimen, is constructed to undergo a series of shaking-table tests. It is first studied in its original state, and its dynamic characteristics (in terms of modal frequencies) are extracted from the recorded signals. The results are then compared with those obtained when an increasing number of couples of pre-stressed SMA wires are introduced in the specimen to link the bricks together. A three-dimensional finite element model of the specimen is developed and calibrated according to the modal parameters identified from each experimental test (with and without SMA wires). The calibration process is conducted by enhancing the masonry mechanical behaviour. The results and the effectiveness of the approach are presented.