• Journal of Industrial Technology
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• v.2
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• pp.61-67
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• 1982

The cause of efflorescence originated from calciumsilicate hydrate brick was studied and some reports on efflorescence were reviewed. The main ingredient of undesirable efflorescence powder was sodium sulphate. It was found that influx of sodium and sulphur components was resulted from hydration water and fine sand.

• 주택과사람들
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• s.205
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• pp.82-85
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• 2007

길을 걷다 발길을 멈출 때가 있다. 향긋한 여인네의 향취나 포르쉐의 매끈한 보디라인 때문이 아니다. 낯설고도 새롭게 느껴지는 건축물 때문이다. 그 옛날 동굴에서 거푸집으로, 또는 벽돌집에서 미끈한 콘크리트 건물로, 다시 거대한 글래스 타워까지 건축의 역사는 인류의 발전 과정과 톱니바퀴처럼 맞물려오지 않았나. 예술과 철학, 패션과 직.간접적으로 영향을 주고받으면서 성장해온 건축은 시대를 반영하고, 때로는 그 시대의 문화를 이끌기도 한다.

• Proceedings of the Korea Concrete Institute Conference
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• 2004.11a
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• pp.173-176
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• 2004

This study is contents about the method which separates ASCON, the tiles and the reds bricks in recycled aggregates. The method of separation used difference of specific gravity.

• Resources Recycling
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• v.14 no.4 s.66
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• pp.3-9
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• 2005

In this study, the utilization possibility of coal-preparation refuse emitted from Hwasun coal mine in Korea as a raw material for ceramic body was investigated. The firing shrinkage ratio of ceramic specimen made from the coal-preparation refuse was reduced with increasing the addition amounts of that, while the compressive strength was slightly decreased. The weight of ceramic body was also reduced because carbon contained in the coal-preparation refuse was burn by fring. The water adsorption ratio of the ceramic specimen was under 10 wt%, and the compressive strength of that was over 21 MPa at over $1,150^{\circ}C$ for 2 hr. Therefore, it was possible to make the 1st garde clay brick of KS L 4201 from the coal-preparation refuse.

• Progress in Medical Physics
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• v.15 no.4
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• pp.247-254
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• 2004

According to developing high energy linear accelerators and treatment methods, like (3 dimensional conformal radiotherapy (3D-CRT), intensity modulated radiotherapy (IMRT), many radiotherapy centers are replacing older linear accelerators with new higher technical machines. This often presents a shielding problem as the designed shield for the existing rooms is not adequate for the higher technical machines. Additional shielding in limited existing space becomes necessary. We are replacing older brachytherapy room with new higher technical linear accelerator for IMRT. This room is not adequate for the IMRT machine without additional shielding design. The logical development of optimum structural shielding designs with concrete and high density shielding blocks are presented. We obtained following results by comparison between the pre-calculating values and actual survey of completed LINAC installation. High density shielding blocks have more powerful radiation protection about 2 times.

• Applied Microscopy
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• v.41 no.2
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• pp.139-145
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• 2011

Parthenocissus tricuspidata is an epiphyte that lacks a main axial stem, but develops adhesive disks along the stem for climbing support. In this study, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were utilized to examine the brick wall surface and the adhesive disks of P. tricuspidata that attached to the surface successfully. The study was mainly focused the outermost layers of both structures before and after adhesion to find out whether there has been some structural and/or physical interactions between the two. The adhesive disks adhered firmly to the brick wall by secreting adhesive materials that help them for a tight attachment to the surface. The rough wall surface appeared facilitating better attachment of the adhesive disks by infiltrating the materials into those spaces leading to some degree of interactions at the interface. EDS analysis on the outermost layers of the adhesive disks that were separated from the substrates was also consistent with the SEM data on the interaction between the adhesive disks and the substrate surface. EDS analysis of the brick wall surface and the adhesive disks demonstrated similar elements of O, Si, Fe, Al, K, Mg, and Na in their components.

• Journal of the Korean Ceramic Society
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• v.34 no.1
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• pp.63-69
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• 1997

The effects of Cr2O3 content on the properties of direct-bonded MgO-Cr2O3 bricks were investigated in the range of 10 to 30 wt% of Cr2O3. Modulus of rupture of bricks was excellent in about 20 wt% of Cr2O3 content. The corrosion resistance of bricks was improved by increasing Cr2O3 content and was directly pro-portional to the amount of secondary spinels. On the other hand, the spalling resistance of bricks depended on the amount of flux rather than Cr2O3 content.

• Journal of architectural history
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• v.21 no.5
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• pp.57-68
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• 2012

The purpose of this study is to identify the characteristics of the use of the western building system with the change of the architectural design in the Japanese colonial period focused on the facility built by Joseon Government-General in 1910s. Through the 131 cases of governmental building, the tendency of the use of western building system. After 1910, Japanese Imperialism adopted the western wooden building system which main structure was made with combination of small pieces of timber for building the modern governmental facility because of the political and financial intention. So, all facilities were designed similarly by the structural module and the facade was finished by the feather boarding in the same with the 'sitamitakei-giyohu' in Japan. the functional requirements of each facility was not revealed. Such an western wooden building system was used until 1920s with the change of the facade by the mortar coating. But, in 1920s-1930s, the building system have begun to change. The use of the brick system caused some changes although the planing concept was still lasted. On the other hand, the use of the reinforced concrete led to more changes on the overall scheme.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.3 no.1
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• pp.45-58
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• 1993

Owing to consecutive start of operation of large-scale coal-fired power plants in Korea, the ash production amounts to about 2 million tons per year. The impact of rising disposal costs, looming environmental problems and increased ash tonnages has heightened the concerns about coal ash utilization. The paper mainly describes the correlation between bending strength and microstructure of brick body from fly ash and clay mixture. The results show that bending strength depends mainly on the size and quantity of pore, the sinterability of matrix, and the crack due to the coarse quarts grain, and that the brick body added 15 wt.% fly ash has the best bending strength over the whole firing range.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2006.11a
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• pp.47-51
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• 2006

Modern residing equipment developed much quantitatively along with economic growth but improvement for agreeable residing space of indoor environment is insufficient situation yet. Also, the latest sick-building syndrome discharging room contaminant such as Formaldehyde, toluene, radon etc. built house or buildings newly human body threaten. Radon of them is real condition that raise origination of lung cancer next to smoke. So, wish to in this research by one of solution way of these problems adsorption performance and specie performance excellent activated carbon to concrete bricks for deconstipating suppository that is room finish fare mix and examine closely after grasp physical, mechanical special quality, hazardous substance and specie performance effect. According to result that estimate environment efficiency evaluation, the $CO_2$ absorption amount displayed decrease effect more than about 90% in activated carbon metathesis rate 40% and radon release amount displayed tendency that decrease about $76{\sim}96%$ in activated carbon metathesis rate 40%.