• Journal of the Korean Society of Environmental Restoration Technology
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• v.6 no.4
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• pp.74-84
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• 2003

This study focuses on the technology to reduce destruction and damages of an ecosystem in the process of road construction. The authors investigated the ecological conservation activities and restoration technology which were applied to the construction of 2 bridges in Japan. The key results are as following : First, the most important thing in constructing eco-road was the linear design. Second, we need to adopt the environmental construction forms and materials to the design of structure. Finally, we have to use environment-friendly methods for the sake of the ecosystem at the real construction stage. Adopting those technologies has at least a few merits. First, we can achieve out goals : conservation and restoration in the local habitat. Second, we can save money instead of building a eco-bridge. There is a further advantage which makes it possible to develop environment-friendly technologies than before by drawing developers' attention.

• 보존과학연구
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• s.30
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• pp.63-77
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• 2009

Scientific studies of conservation techniques and materials in Korea have experienced fast development since international practice and academic knowledge have been introduced to Korea from Japan, France, Germany, and etc from the late 1960s. In recent years, it has been observed that the academic standard of research and the level knowledge of the field in Korea at present are far advanced to compete with many countries. However, many Korean cases still have displayed that the standard and the quality of conservation practice need to be improved. This research examined several cases of derelict restoration of metal relics executed by non-conservators and the effects of their ignorant use of irreversible materials on the valuable objects. The purpose of the study is to display the problem of such treatments and to suggest a need of framework to prevent the loss of original form from them. Metal Buddha statue (Cosmic Buddha) in Borim Temple (National Treasure No. 117), which was conserved by an unexperienced non-conservator, has suffered from a serious problem of corrosion because of the use of destructive material, iron chloride. Another case for metal Buddha statue in Dopian Temple (National Treasure No. 63) displays a representative example of using irreversible materials, Cashew and such ignorant application made a later conservation treatment so difficult in removing the material from the surface of the statue. In conclusion, the research argued that the understanding of materials used in the objects, and the value of relics is important, and pre-experiments before applying conservation materials to a valuable heritage are essential in the conservation treatment.

• Journal of Conservation Science
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• v.31 no.2
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• pp.87-94
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• 2015

Plastic artwork can be appeared crack, change of color and whitening event by various environment conditions. A large scale plastic artwork often exhibits in outside it will be directly degraded by physical and chemical degradation factor such as strong sunlight, high humidity and rainfall. We should know degradation characteristic of plastics to prevent these damages. In this study, we studied degradation characteristic of plastics (5 types of wide use plastics; polypropylene, polystyrene, polyethylene, polyvinyl chloride, polyurethane) depending on various artificial degradation conditions such as high temperature, ultraviolet and these complex conditions (high temperature and ultraviolet). As a result, polypropylene, polystyrene and polyethylene show the most visible change especially polypropylene, polystyrene. Polypropylene didn't show a great change degree of tensile strength and contact angle, on the other hand polystyrene did. Polypropylene and polystyrene weakened by photo degradation, polyvinyl chloride and polyurethane had relatively good light stability. Also the high temperature and complex conditions were most degradation characteristic. High temperature worked for degradation catalyst because its energy can not enough worked for cut off binding energy of plastics while ultraviolet condition effected as directly degradation condition. Though following results, we expect it can be applied to investigation of degradation factor depending on plastic artwork materials and basic result of plastic artworks conservation.

• Journal of the Korean Professional Engineers Association
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• v.41 no.3
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• pp.30-34
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• 2008

Recently problems of soil and groundwater contamination occur in major construction sites of highway, dam and railways. Contaminants of oil fuels are also detected in the former fuel storage facilities of railroad station and army troops of transportation, etc. These facilities are planned as the sites of commercial infrastructures after restoration from pollutants by the law of soil environment conservation of Korea. In this manuscript, the contents of soil environment conservation law including soil assessment and restoration technology are introduced. Recent changes of soil environment area are also analyzed.

• Journal of Conservation Science
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• v.26 no.2
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• pp.191-201
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• 2010

This study was focused on conservation treatment and restoration of the monument for Jo Heon and the Soldiers in Chilbaeguichong. The monument has been ruined by bombing in the era of Japanese colonial(1940) and restored in 1971. Nevertheless, it still showed serious problems such as loss of original form, structural instability, and unnatural appearance. In order to improve its conservation state, the stele basement which was lost by bombing was restored and combined with body and top stones. The broken part of the top stone was also restored with new material through provenance interpretation.

• 보존과학연구
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• s.29
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• pp.163-182
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• 2008

Precise scientific-diagnosis for preserving stone cultural properties has been well-advanced, but research on proper methods for conservation, restoration and repair is still in early stage. Accordingly it is quite difficult to establish conservation treatment methods compatible to unique characteristics and environments of each cultural property. We tried to select most compatible conservation materials through thorough assessment of conservation materials in current use. This research is focused on conservation and restoration materials except cleaner, which are used as adhesive, filler, repellent and consolidant. Conservation treatments for stone cultural properties were first tested in 1960's and have been carried out by various methods under relevant organizations and conservation treatment companies since. We investigated present status of conservation materials being used for cultural properties. Based on these data, we will look through types and properties of the conservation materials to figure out existing problems. Among many kinds of resins, the ratio of conservation materials used in cultural properties is very low. Therefore, new conservation materials equipped with proved long-term stability should be developed as soon as possible.

• Conservation Science in Museum
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• v.28
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• pp.1-16
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• 2022

Treatment was performed to conserve the Underwood Typewriter (Hangi 6863) from the collection of the National Hangeul Museum. Since the typewriter was presumably manufactured in the modern or contemporary era and bore patterns of damage such as component loss, corrosion, and paint loss, as well as being made of multiple materials, a condition survey and a scientific analysis were conducted ahead of the conservation treatment in order to carry out appropriate treatments for each material. The analysis confirmed that the typewriter was made of various materials including metal, paint, and rubber, and the conservation treatment was performed in the sequence of removal of contamination, reinforcement, and restoration under conditions where each material was stable. Conservation treatment was completed in a stable state by strengthening the layer of damaged paint and restoring the lost leg. These processes have enabled a better understanding of the materials and characteristics of typewriters manufactured in the early modern era, which is expected to provide basic data for typewriter conservation research to be conducted in the future.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.2B
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• pp.131-137
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• 2012

River areas are classified as conservation, restoration, and recreation zones depending on engineers' opinions from their experiences at present. For conservation zones, almost all engineers have the same opinions because natural characteristics are considered for classification. However, it is difficult to decide a basis in classifying restoration and recreation zones in mixed areas by urban and rural streams. This study attempted to prove an application of a previous study (Song & Yoon, 2008) that suggested two classification techniques to classify conservation or maintenance zones, and reclassify maintenance zones into restoration or recreation zones. The suggested classification techniques of river zones were used to estimate 46 reaches of 20 urban streams, 47 reaches of 29 rural streams, and 48 reaches of 19 mountainous streams to achieve a purpose of this study. The conservation, restoration, and recreation zones were reasonably divided by results of the suggested techniques. A possibility that quantified criterion could be used to classify river zones was proven in this study.

• Journal of Conservation Science
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• v.25 no.2
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• pp.115-130
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• 2009

This study was focused on digital restoration and structural stability evaluation applying 3D scanning system of five-storied Magoksa temple stone pagoda in Gongju. For these, the digital restoration of the pagoda was completed using laser scan data which is measured 16 directions and data processing program of 7 stages. As a result of digital restoration, the overall height and width of stone properties showed a little difference in directions and the width of roof stones appeared very high difference of each floor. The width of pagoda body become smaller to the fifth floor, but gradual decrease rate showed irregular characteristics. Also, as result of 3D image analysis for structural stability evaluation, the displacement occurred toward northwest in second body stone to upper final stone except for central axis of the first body stone which inclines toward southwest. Such 3D image analysis is required quantification of survey method and should be applied to various field such as quantitative damage maps in order to utilize a conservation of stone cultural heritages, continuously.

• Journal of Conservation Science
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• v.38 no.4
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• pp.301-313
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• 2022

We made a Korean white porcelain or Joseon Baekja jar and based on the raw materials used and reproductions of each stage, we aimed to compare and analyze the physicochemical changes of the raw materials such as clay at each manufacturing stage, as well as identify the characteristics and correlations. Although the basic main components of clay and glaze material are similar, their texture becomes denser in the process of bisque firing pottery (Chobeol-pyeon) and glaze firing pottery (Jaebeol-pyeon), and we confirmed that in addition to the tendency of increasing vitrification, low-temperature minerals such as mica and illite gradually disappeared, while high-temperature minerals such as cristobalite were newly created. This phenomenon has also been verified by the rapid decrease in absorption rate while the change in specific gravity was small. In addition, the color was greatly affected by the firing atmosphere, and the yellow-red chromaticity of the raw materials was higher during bisque firing but showed a rapidly decreasing characteristic during glaze firing. The value of magnetic susceptibility, which is related to iron (Fe) component, showed a tendency to decrease in glaze firing pottery. CT images were confirmed as a method that can indirectly estimate the change in the material properties of the object step-by-step for the entire object. In conclusion, the study of manufacturing stages of reproduction can provide basic data for scientific research on the estimation of porcelain and pottery making technology and changes in raw materials.