• Journal of the Korea institute for structural maintenance and inspection
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• v.13 no.6 s.58
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• pp.106-114
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• 2009

The basis principle of conservation about deterioration and corrosion of cultural assets building is the archetype maintenance, and should not make a factitious damage mistake by repair. Accordingly, conservation processing method using synthetic resins is embossed. The purpose of this paper is about flexural capacity of rectangular section wood using synthetic resins, the 11 specimens are manufactured and made an experiment about reinforcement length, ratio, material strength, direction of synthetic resins as variable. The results of this paper has shown that flexural reinforcement of wood by synthetic resins are efficient and found the possibility of using.

• Journal of the Korea institute for structural maintenance and inspection
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• v.20 no.6
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• pp.20-29
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• 2016

This study investigates the effect of the absorbent materials on the material properties(compressive strength and drying shrinkage) of natural hwangtoh mortar which is one of the traditional building material in Korea. The absorbent materials used are seaweed paste and Super-Absorbent Polymer(SAP). In addition to the absorbent materials, the initial sealed curing recommended by the standard specification of properties for Korean traditional building materials is also a main interest of this study. Based on the test results of 28 days compressive strength and converged drying shrinkage, it is confirmed that the initial sealed curing for 7 days is effective to reduce the drying shrinkage and to enhance the compressive strength. Thus, it is verified that the recommendation is reasonable and has positive effects on the properties of the mortar. Next, the test results show that the addition of absorbent materials into the mortar is also effective to the two properties depending on their absorption capacity. Thus, it is more effective to use SAP than the seaweed paste because of higher absorption capacity. However, both the initial sealed curing and keeping total water contents of the mortar are required to show this effectiveness. Lastly, the compressive strength is inversely proportional to the drying shrinkage. By using this relation, the reason of the increase of compressive strength due to the initial sealed curing or the addition of absorbent materials is quantitatively explained.

• Journal of architectural history
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• v.16 no.3
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• pp.39-56
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• 2007

This study is conservation works trend since 1900. Objects for study are National Treasures and Treasures in Buddhism, in wooden architecture. And researched about the factor of conservation works, roof and tile, painting and dissolution conservation works cycle by dissolution, timber change ratio. The factor of conservation works is the most, roof and tile. Conservation works cycle by dissolution is 12.8 years. Painting cycle is 16.3 years. There are two concepts of conservation works, that is restoration and preservation. There are many restoration before 1960's. To 1960's the preservation to be many to 1970's many Restoration. And since the end of 1970's is Preservation. These reasons are conservation works history of object, the rule for Heritage protection, people on works, and study of architecture. history.

• Journal of Conservation Science
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• v.37 no.5
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• pp.536-544
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• 2021

In the present study, safe management and value improvement of bamboo sunblind, which is an item of cultural heritage, were performed by adopting stable conservation treatment methods. The bamboo sunblind used in the present study was excavated from No. 1 catchment site in Baesanseongji, Busan. It was determined that the main material used to make the sunblind was bamboo, and herbal plants were used to weave the bamboo using lacquer as an adhesive agent. All contaminants and soil adhered to the sunblind was removed. Thereafter, the sunblind, which was recovered in the form of blocks, was washed separately after fixing it to a temporary plaster frame and to avoid the blocks from breaking during washing. Then, polyethylene glycol (PEG) impregnation was utilized for the reinforcement treatment. Based on the preliminary test results, the shape of the sunblind was fixed using a stainless-steel frame to prevent physical damage that may occur during the drying process. Thereafter, the bamboo sunblind was vacuum freeze-dried. PEG 20% (in ethyl alcohol) was applied as a surface treatment agent for stabilization the sunblind. After the surface treatment, the bamboo sunblind were joined together to fit the maximum width, and the rectangular shape of the sunblind was restored-as best as possible-while filling in the missing parts by maximizing the use of unknown members such as in the disturbed layers below bamboo sunblind surface. The conservation treatment was completed by fixing the bamboo sunblind into the fabricated frame.

• Journal of Conservation Science
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• v.36 no.2
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• pp.103-111
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• 2020

To compare the cleaning effect of solvents such as water and ethanol used to clean lacquer relics, the components extracted with various solvents were analyzed. A freshly dried lacquer sample and a lacquer sample exposed to ultraviolet radiation for 24 days were treated with water, ethanol, acetone, and hexane, and the dissolved material was detected by pyrolysis-gas chromatography-mass spectrometry. The amount extracted was significantly higher in acetone and ethanol than in hexane, a nonpolar solvent. Water, a highly polar solvent, was relatively efficient for extracting low-molecular-weight materials. After experiencing 24 days of ultraviolet radiation, the lacquer exhibited a significant increase of extracted materials compared with the nonexposed one. This may be due to the degradation of the urushiol chain in the form of polymers, resulting in the formation of low-molecular-weight polar substances, including dicarboxylic acids. In addition to the deterioration status of lacquer relics, such solvent extraction properties will be a crucial consideration in selecting the appropriate cleaning solvent.

• Journal of architectural history
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• v.31 no.5
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• pp.7-20
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• 2022

Traditional building technique has been used as the main technology in the field of architectural heritage conservation in South Korea. It has remained this way with very little resistance until now. But the time has come to question the appropriateness of traditional technique as conservation technique. In this paper a study was done on the properties of the traditional technique and the architectural heritage conservation technique in order to define the appropriateness between the two techniques. As a result the traditional technique was found to be unfit for conservation technique. The reasons are as follows. First, there is a time gap between the traditional technique and the time when the heritage was first built. Second, conservation work is about retaining the values of being a heritage while the traditional technique is about safeness and practicality. Third, the use of traditional technique comes with using the tools of its time which cannot ensure the safety of the heritage. The traditional technique must be looked upon as one of an option in the field of conservation. We must develop a better conservation technology by finding balance between the traditional technique and modern science. And further more an aggressive investment must be made in order to realize this objective.

• The Journal of the Convergence on Culture Technology
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• v.10 no.2
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• pp.555-563
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• 2024

We were selected oriental medicinal herbs known to be effective in strengthening muscles, improving sarcopenia, treating arthritis and osteoporosis. Amino acids have been reported to be associated with the above-mentioned effects. During the manufacturing process of water extracts of ginseng and samchae, the content of arginine, a basic amino acid, was significantly reduced. The decrease was 99.48mg/100ml for steamed red ginseng compared to 114.07mg/100ml for dried white ginseng, and 54.69mg/100ml for steamed samchae compared to 118.90mg/100ml for dried samchae. The extracts of the wild roots of Acanthus apias and the above-ground twigs of Acanthus apias showed significantly higher DPPH and ABTS radical scavenging activities. Meanwhile, DPPH activity was higher in steamed red ginseng and steamed samchae compared to dried white ginseng and dried samche, but ABTS activity increased to 66.88% for steamed red ginseng compared to 41.96% for dried white ginseng, but was 77.48% for dried samchae and 77.52% for steamed samchae.

• Journal of the Korean Society of Costume
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• v.62 no.6
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• pp.182-199
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• 2012

The purpose of this study is to analyze the actual status of costume exhibitions displayed in architectural structures heritage today to examine if they play proper roles as visual materials and suggest the necessity of post-management for comfortable viewing. This is significant in that it makes costume exhibitions function as educational culture contents to let Korean and also foreign viewers know of our costume culture properly. As a research method, the database of the Office of Cultural Properties homepage was used to extract anything related to the lives of figures during the Chosun Dynasty among the architectural structures heritages in Seoul, Incheon, and Gyeonggido. By doing so, the costume exhibitions were able to be examined among them. With field investigation and interviews of related institutions, this study examined the current status of costume exhibitions, planning of exhibitions, and post-management. Also, they found costume exhibitions that were not right for the era, and suggested ways that were more appropriate for them. The results of this study were as follows : First, according to the third selection results, there were only six among 71 places where three districts of the architectural structures heritage were present. This is a very small quantity of places when compared with the total number of architectural structures heritage. Second, as a result of the current condition investigation, the costume exhibition in the Architectural Structures Heritage is not nearly enough for a historical investigation, and almost all polluted costumes were not displayed in suitable environments for an exhibition. Therefore, qualified managers who have expertise in exhibition planning were needed to be trained to do a post-management follow up. Furthermore, it is important to systematically reorganize post-management methods. Third, the two selected places(Haepung-buwongun-yuntaegyeong-jaesi and Sunaedong-gaok) were thought not to be right for the era among the six places with costume exhibitions, and suggestions such as flat-drawing and illustration were made.

• Journal of Conservation Science
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• v.16 s.16
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• pp.110-118
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• 2004

In order to evaluate two-step treatment of PEG-freeze drying for highly-degraded waterlogged ash woods (Fraxinus PP.; ca. 5,700 BP), which were excavated from peat lands in western Korea, dimension stability was examined during 45 months after complete treatment. The samples pre-treated with PEG in water solution showed better dimensional stabilities than the ones with PEG in t-butanol(TBA) solution. It suggests that TBA reduced the flexibility of wood cells and overflying by TBA induced micro-checks during freeze drying. Micro-checks results in fragile wood structures and consequently, large shrinkage by moisture absorbances of high PEG contents during exposure in humid condition. The results suggest that PEG in water-solution treatment is better than PEG in t-butanol as pretreament for freeze drying of highly-degraded waterlogged ash woods.

• Journal of Conservation Science
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• v.28 no.2
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• pp.95-99
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• 2012

The compressive strength of PEG along processing concentration and solvent is willing to be measured and proper processing condition for exhibition and storage is also willing to be measured by comparing with dimensional stability. In the advanced research of setting PEG-preprocessing concentration & solvent for freeze drying of waterlogged archaeological wood of high water content, vacuum freeze drying showed the highest dimension stability after 40% PEG-preprocessing of aqueous solution. In this study, the compressive strength increased in proportion of processing concentration and water showed the relatively-higher compressive strength than t-butanol regarding solvent. Especially, it showed that there is no big strength difference between PEG 40% and PEG 50% in aqueous solution by 6.6%(16kgf/$cm^2$). According to the above results, it was recognized that it is most effective to implement freeze drying after 40% PEG-preprocessing when want to dimensional stability and compressive strength simultaneously.