The purpose of this study lies on reinterpreting the geography books in Joseon dynasty as records of the cities and consequently suggesting directions for further urban research. Geography books of Joseon dynasty are valuable references to understand the national policy, and imply that the focus of the contents is on the system. Especially, military system is an important concept to understand city type in that period, relationships between cities, selection of location, etc. The results of review are as following: First, military system is not a permanent fixture and therefore reflects changes in urban policies along with the history. The system suggests valuable clues on urban development as it is state-run, and closely associated with national land development. Second, counties and prefectures under jurisdiction of district called Eupchi(邑治) had cities as important as or even more important than local government such as Yeong-a(營衙), Jinbo(鎭堡), Yeok(驛: administrative cities). Such special regions need to be studied as other type of cities in Joseon dynasty by defining their architectural characteristics and roles. Third, the relationship of cities such as Eupch, Yeong-a, and Jinbo, was reorganized according to the local military system. Eupchi, administrative city, along with Yeong-a and Jinbo evolved into a military city as it became systematically organized. The characteristics of Yeok needs to be reconsidered in the context of such new inter-city relationship. Fourth, considerations which should be reviewed in the geography based on this concept can be mainly classified into architecture and landscape. This will also lay the foundation, and suggest new directions for further research for Eupchi, Yeong-a, Jinbo, and Yeok. Fifth, description of the geography looks simple at first sight, but with thorough understating on the system, there are chances to interpret objective reasoning of position and landscape in the overall flow of region, area, etc. Bongsu(烽燧), signal-fire, can be an object of comparison with geographical features and position. Furthermore, advantageous position is a historical and geographical element showing the major context of the region.

The plan type of Korean protestant church architecture underwent changes as following five stages according to the changes of the distinction between the sexes. First stage - At the beginning of missionary work in Korea, Koreans generally worshiped in missionary houses which were traditional Korean styles. The plan type of these houses was a simple '-' figure. At that time, men and women worshiped separately because of the idea of the distinction between the sexes. They either worshiped in different places at the same time or in the same place at the different time. Second stage - At this stage, men and women started to worship together in the same place. At the beginning of this stage, men sat in the front of the chapel on a rostrum, and women sat behind the men. The plan type of the chapel was a simple '-' or a rectangular figure. Later, they sat separately on the right and left side. There are the visual interceptions which were set up between them. As the number of church members increased rapidly, a new type of church architecture appeared. It was a 'ㄱ' figure. At that time the entrances were separated by the sexes. Third stage - At this stage, the visual interceptions disappeared as the idea of the distinction between the sexes became weak. As new churches had been constructed by the plan type of rectangular figure, the visual interceptions weren't set up anymore. Fourth stage - At this stage, the separated entrances were unified as one. But the arrangement of their seats didn't change because of the old idea of the distinction between the sexes. Fifth stage - In the final stage, the plan type of the church architecture was not determined by the idea of the distinction between the sexes but social, economical, technological facts and the influence of the foreign architecture. At this stage, new and various kinds of the plan type appeared such as the fan, round, squared, or oval figure as well as the rectangular figure. Men and women were not classified anymore. They started to sit and worship together in the same place. Also, when men and women sat separately from side to side because of the Idea of the distinction between the sexes, men sat on the right and women sat on the left side of rostrum. It didn't applied Confucian ideas but the idea of protestant church; protestant churches have the idea that the right side is more important but it does not in Confucianism.

The region of Southeast Asia had already experienced rapid urbanization and cultural change before the East Asia region did. None the less, nowadays shophouses and rowhouses still form the major portion of streets in Chinese town in Southeast Asia countries. The purpose of this study is to examine the adaptation process of shophouse and rowhouse in the Southeast Asia region and the architectural characteristics between the middle of 18th and the early of 20th, which Chinese people of the region inherit and develop, for more thorough understanding of cultural adaptability and regionalism of Chinese architecture in Southeast Asia. The common fact found in the Southeast Asia region is that Chinese people in countries of this region gradually started to live densely as a group in a certain zone in city area since they got to play important roles in commerce, trade and service works related with cities, due to European countries' advance into Southeast Asia and their construction of colonial cities in the region. Chinese people in the region utilized residential rowhouse and special shophouse, which is a kind of shop adapted from rowhouses' sitting room or storage, for their commercial and industrial activities in urban areas, which had problems of limited space. They also realized high densities through vertical expansion of space in order to adjust to changing urban structure under execution of urban planning in cities of colonial area and rapid urbanization. Even though residence of Chinese in Southeast Asia was influenced by new political, social, economic and cultural rules of European colonies in Southeast Asia, it has continuously succeeded to the cultural tradition of China, their home country, in terms of planning principle which puts air well in the middle and hierarchial spacial construction method. Appearance of the open connected verandah, designed by Stamford Raffles, the founder of Singapore, can be regarded as one of the architectural characters. Hence, Chinese residence in cities of Southeast Asia can be understood as a new regional architectural culture in the context of European countries' urban planning and urbanization of colonial areas, Immigrants from southern China and their role, their adjustment to urban areas by utilizing mixed type houses of residence and business, cultural tradition of Chinese home country.

In this research, we analyzed the activities of Japanese architectural offices in Korea during the Japanese occupation era, classifying them into two groups: first, Japanese architectural offices that had their bases in Korea, and second, Japanese architectural offices that had their bases in Japan. There were totally 98 Japanese architectural offices that had their bases in Korea during the Japanese occupation period. The number of those offices had increased rapidly since 1920s. Nakamura(the design of bank buildings), Tamada(the design of theaters), Otsumi(the design of Japanese style residential houses) can be regarded as the most remarkable Japanese architectural offices among them. We found that these offices already specialized in certain architectural planning fields, such as bank buildings, theaters and residential houses. It was also found that, during the Pacific War period, even privately-managed architectural offices were mobilized for the war by Japanese government, through designing munitions factories, etc. On the one hand, since some large Japanese corporations entered into Korea, many Japanese architectural offices, that had their bases in Japan, got into working in Korea and designed a number of buildings, with the exception of the architectural office of Vories, who was a Christian architect. Even though the place that the activities of these Japanese architectural offices were carried out was Korea, any factors of Korean architectural style couldn't be found In their works. This means that they just transplanted the Japanese modern architectural style in Korea.

The subjects of the research is the architecture expressed traditionality from the time of the Open Port on, including North Korea region. The scope is divided into three periods; the first is from the Open Port to the Rehabilitation (光復),1945, the second is from then to 1960, and the last is from 1960 to the present. The expression of Koreanity(韓國性) should be concerned with the states at the time. In the beginning of the first period the alienate culture and the new modern facilities, like electricity, telecommunication system, train service, etc., rushes to Korea and the traditional architecture accepted the most of the new-comings; therefore, the original form was transformed. That seems to be the beginning of the discourse on traditionality in Korea architecture. The expression was showed up in four parts: ● Korea traditional architecture accepting the foreign culture and the modern facilities ● the compromise between foreign and traditional architectural form ● the compromise between the Modem and traditional architecture ● the Imperial Crown Style(帝冠樣式) which is the eclectic architecture with transformed roof. The figurative expression in the present architecture was showed up in roughly two parts: ● the traditional form directly depicted wholly / partially ● the abstract traditional form wholly / partially Moreover the results on the research traditional architecture have been collected, the principles have been drawn out. Especially the first beauty is not on form or figure of a building but on the composition of architectures and the harmony of the natural circumstances and architectures. So many contemporary architects make efforts to apply the principles to the composition and formation of current architecture.

In this thesis, the Development of Station Buildigs Design during last a hundred years in Korea is analyzed. From the early time to today, several posts of Office of Korean National Railroads have controlled the Station Buildings Design by Standard Drawings. Sometimes, private architects joined in designing the Stations, that have the value as historic architecture. Under the Japanese imperialistic rule, Japanese Officer designed all of the stations ; that can be classified 1) wooden compromise style, 2) renaissance style, 3) northern European house style, 4) general station by standard drawing, 5) Korean house style. 6) modernism style. Especially, Korean house style was not planned to commemorate the old Korean Architecture, but to beguile the Japanese tourists' monotony of the journey in Korea. After the Independence, the Station Buildings are grouped into 1) international style, 2) modernism style with traditional details, 3) Station Complex Buildings. In the future, design of the Railroad Station Building needs to be diversified to satisfy tourists' emotion.

C-S-H phase is one of the main hydrates in hardened cement paste and binds chloride ions. The purpose of this study is to quantify equilibrium amount of chloride adsorption bound by C-S-H phase with various Ca/Si ratios. C-S-H phase can absorb chloride ions with 3 steps. In the C-S-H phase with low Ca/Si ratios, momentary physical adsorption could not be expected. Physical adsorption is strongly dependent on electro-kinetic interaction between surface area of C-S-H phase and chloride ions. In previous research, C-S-H phase showed binding behavior with 3 stages including the stage of instantaneous physical adsorption other stages. Thus, this study examined the equilibrium amount to express chloride binding isotherm of C-S-H with various Ca/Si ratio.

Submerged concrete is subjected by water pressure. Unfortunately, there is a definite lack of well-established research to deal with the effect of permeability on chloride penetration in concrete. This study developed new modeling to predict chloride penetration in submerged concrete subjected to various water pressures.

Concrete with a pore solution of pH 10-12 is less alkaline than sound concrete but would still produce a strong color hange with phenolphthalein indicator. It therefore follows that the indicator test is likely to underestimate the depth to which carbonation has occurred. The indicator has not changed color near the top and bottom surfaces, suggesting that these near-surface regions are carbonated to a depth of at least 3 mm from the top surface and 5 mm from the lower surface. Where the indicator has turned purple - the center of the slab - the pH of the concrete pore fluid remains high (above 8.6, probably nearer 10).. Based on the above technical background, this study was devoted to examine the depth analysis of carbonated concrete quantitatively.

Many researchers have defined critical chloride content as a specific value. The studies reporting critical threshold chloride content have involved the experimental measurement of the average amount of the total chloride content. The studies have tried to define the critical chloride content within the scope of their experimental concrete mix proportion at arbitrary time. However, there is no agreement on its value. The purpose of this study is to explore the combined effect of oxygen and chloride on reinforcement corrosion. In the experimental recipe, water soluble oxygen is taken into account to define the critical chloride content. Corrosion current density of reinforcement was measured by linear polarization resistance method.

Leaching is a diffusion-reaction phenomenon which takes place when concrete is exposed to poorly mineralized or acid water. Degradation consists in dissolution of calcium and hydroxide ions out of the matrix, which causes an increase in porosity and transport properties of surface concrete. Leaching is accelerated in neutral and acid solutions, and it may be coupled with the ingress of aggressive ions such as chloride, sulfate, magnesium. For this means, this study computed Ca2+ ion content in pore solution theoretically.

Large construction such as tunnel elements and foundations for bridges can be placed on large sea water depths where the water pressure is fairly different from the pressure in the splash zone although main driving force of chloride penetration in concrete have been regarded as diffusion. Moreover, hydrostatic pressure increases in proportional to measured depth from the surface of water because of the increasing weight of water exerting downward force from above. In this study, new experiment method to estimate chloride penetration of concrete under water pressure is introduced. The life length for such a concrete structure on a large sea water depth is estimated using the normally used models and this experimental program.

Permeability is not a function of porosity alone, it depends on the porosity, pore size and distribution, and tortuosity of pore channels in concrete. There has been considerable interest in the relationship between microstructure and transport in cementitious materials, however, it is very rare to deal with the experimental study on the gas permeability coefficient of concrete. In this study, Yoon’s test was introduced. As the experiment result of gas permeability for carbonated concrete, gas permeability coefficient was successfully obtained and this was obvious for concrete with high w/c ratio

There is an increasing need for new materials and methods for rapid but durable repair of concrete. The author outlines the main properties and reports on some aspects of durability derived from laboratory investigation. Micro-fibre reinforced polymer cementitious materials provide early strength materials and can be considered dimensionally stable. Compressive and bonding strengths show a satisfactory strength. Meanwhile, the micro-fibre reinforced polymer cementitious materials had a low permeability which doesn’t allow water vapour to diffuse through the matrix. Details are expected to be given of successful applications on most of all concrete structures.

콘크리트의 전기저항은 철근부식 개시 이전인 잠복기와 철근부식되는 진전기 두과정과 유관된다. 염소이온에 노출된 콘크리트 구조물의전기저항은 초기 부식율의 위험도를 표현할 수 있는데, 낮은 전기저항은 빠른 염소이온 침투와 높은 부식속도를 의미하기 때문이다. 콘크리트의 전기저항은 인가된 전압과 전류간의 비율인 전기저항으로 표현된다. 이전의 연구에 의하면 콘크리트의 전기저항은 콘크리트내 수분량, 미세구조 및 탄산화 등에 크게 의존하였다. 습윤량과 전기저항의 관계를 다룬 연구가 적지만 존재하는 반면, 염소이온이 전기저항에 미치는연구를 행한 연구는 매우 드물다. 본 연구의 목적은 염소이온이 콘크리트의 전기저항에 미치는 영향을 고찰하는 것이다. 실험결과에 의하면 염소이온량은 전기저항을 떨어뜨리는 것으로 나타났으며 이는 선형의 관계가 성립되었다. 초기 양생 50일 이전까지 전기저항의 감소추세는 뚜렷하였으며, 이후로는 염소이온량과 상관없이 일정하였다. 결과적으로 본 연구는 염소이온량을 함유한 콘크리트의 전기저항을 표현하는데 결정적인 방법을 제안하였다.

The phenomenon of leaching consists in the dissolution of solid calcium in cement hydrates when concrete is exposed to any aggressive solution. Calcium leaching is completely controlled by the thermodynamic equilibrium between cement hydrates and the porous solution. Thus, it might be described by considering the hydrates (C-S-H and aluminates) solubility evolution with pH. Nevertheless a simplifed model has been proposed considering only the different calcium phases of the hydrates. This study suggested definition of calcium leaching density with type of cement hydrate.