• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2014.11a
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• pp.82-82
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• 2014

마감 도장이 완료된 면이 장기간 노출된 상태에서 후속 작업으로 인해 금속 분진 등의 오염물이 쌓이면 수분 및 염분 등과의 반응으로 도장 표면에 녹 등의 2차 오염이 발생하여 광택이나 표면 미려함 등을 잃어버리게 된다. 이럴 경우 소요되는 시간과 경비를 줄이기 위해 재도장 작업 대신 도장 표면의 오염 막을 제거하기 위한 방법으로 rust remover가 사용되고 있으나, 현재 rust remover 사용에 따른 도막 열화에 관한 객관적인 자료가 없는 실정이다. 본 연구에서는 당에서 사용되고 있는 선박용 마감 도료를 대상으로 rust remover가 도막 표면 열화에 미치는 영향에 대하여 조사 검토하다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.12 no.6
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• pp.233-240
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• 2008

This paper presents an experimental study on the air contents and the chloride penetration in offshore concrete depending on the types of forms. Three types of concretes(plain, MSF, and FA concretes) with four kinds of forms(wood, coating wood, steel, and polypropylene film) were investigated. The test results show that the air contents in the concrete cured with steel and polypropylene forms were higher than those with wood and coating wood forms. The concrete with wood forms has the least air content. The variation of chloride ingress time was large depending on the types of forms on the same concrete, i.e. 13.2, 20.3, and 17.7% for Plain, MSF, and FA concretes, respectively. Consequently, the surface conditions of forms should be considered for design of durable concrete.

• Journal of the Korea Institute of Building Construction
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• v.15 no.6
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• pp.607-614
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• 2015

Generally surface finishing of building is done with water paint that performs basic water repellency and resisting. When painting the exterior of the building with water paint, application method is easy and inexpensive and it has the advantage of building maintenance. But surface finishing of water paint is easy to discolored or aging due to ultraviolet light so the effect is not satisfying than expected. Therefore this study is to analyze durability of water-repellent paints mixed with water-repellents as outer surface finishing materials, and evaluate its feasibility. Color change and color different due to the accelerated time were tested, and the feasibility was evaluated based on the test results. The experimental results of color different, brightness different and chromaticity suggested that water-repellent paints mixed with water-repellents were suitable for finishing materials. Considering overall general durability performances, stable mixing ratios were 2, 5, and 8%.

• Korean Journal of Construction Engineering and Management
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• v.6 no.6 s.28
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• pp.160-170
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• 2005

Because designers want to express various elevation, architectural concrete has recently paid attention to finish material and has increasingly used in the construction. architectural concrete needs more careful and professional supervision works such as controling quality of color, texture, construction plan, and design plan. none the less, It is not clear to define process and manage methods for the construction life-cycle, which causes the expense to increase and the quality to be poor. this study will analyze concrete finish method by dividing three parts which are common, exposed and architectural concrete finish method. definition and the limit of application in architectural concrete finish method will be present by comparing three methods. Throughout an interview with a staff in charge and a case study, this paper shows the requirement and the keynote of management which are divided by three steps; the design, construction and maintenance. finally, this research provides management methods of individual steps for effective construction.

• Journal of the Korean Recycled Construction Resources Institute
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• v.7 no.4
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• pp.358-366
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• 2019

The purpose of this study is to explore the possibility of estimating optimum surface finishing work time of the fresh concrete placed at the job site by applying a surface hardness test meter(Durometer). Tests are carried out by measuring and comparing the Proctor penetration resistance test and hardness test by Durometer. Correlations between Procter penetration test and hardness test by Durometer were obtained. Two different types Durometer were applied to estimate setting time. Test results indicate that the measurement of the Durometer and the test of the Proctor penetration resistance are highly correlated. When measuring the initial setting time with Durometer, initial setting time is reached when the hardness value by the type C Durometer is reached around 42HD, and when final setting is measured with the type D Durometer, the surface finishing work time limit and curing time can be estimated with 10HD of Durometer.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.57-58
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• 2019

Precast concrete finishing panels can be implemented in different colors, textures and designs relatively freely by different designers in different finishing materials. Therefore, we tried to develop a PC finishing panel that can be applied in the field by using various color pigment and concrete surface retardation method and polishing method.

• Journal of the Korea institute for structural maintenance and inspection
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• v.21 no.4
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• pp.39-46
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• 2017

The experimental research was conducted to evaluate the adhesive performance of surface finishing material with primer based on silane(primer). For this purpose, concrete specimens with compressive strength of 18, 30, 50 MPa were made and cured in water condition ($20{\pm}2^{\circ}C$) for 28 days. A primer was applied on the age of 28 days and evaluated according to based on the curing age of the surface finishing material. Moreover, the mortar specimen also made and tested as per KS F 4937 for compared with concrete-based test results. Test results indicated that the adhesive strength of specimens with primer exhibit similar than that of specimens without primer. Also, the adhesive performance improved with increasing in curing age and compressive strength. The correlation between compressive and adhesive strength of mortar and concrete specimens showed similar trend. It was noted that there is no significant effects of primer on adhesive performance of surface finishing material, thus use of primer has superior potential for solving durability problem of concrete slab surface.

• Journal of the Korea institute for structural maintenance and inspection
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• v.10 no.5
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• pp.157-163
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• 2006

This study is on the evaluation of double surface protection method using water repellent primer and final top coat to protect concrete. Water repellent agent has been applied on the final top coat to protect concrete. However, to make up for the weakness to the ultraviolet of the water repellent, the work procedure of these protectors is done vice versa. This combination of protectors was compared with existing ones in this study. Even though the final top coat was applied on the water repellent primer, its adhesive strength met to KS F 4936-' 03 with other protectors used in this study. All surface protectors used in this study were excellent in protecting concrete. Especially, in case of applying with final top coat in conjunction with water repellent primer, the resistance against chloride ion penetration and neutralization by $CO_2$ was more efficient than other surface protectors used in this study under this given condition.

• Journal of the Korea institute for structural maintenance and inspection
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• v.22 no.1
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• pp.183-189
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• 2018

In this study, the bond strength between concrete and metal films was investigate according to changing water content ratio of substrate concrete by pull-out test in order to develop the new finishing design methods for building structures using the metal films. The following conclusions were obtained as a result of the studies. It was find that the colour of metal did not change before and after the metal spraying. Also, the water content ratio of substrate concrete must be controlled under 10% weight to confirm the standard bond strength of finishing material to concrete. 2.5 MPa. To enhance the bond strength between concrete and metal films, it is very effective to strengthen the concrete surface using the agent which strengthen the concrete surface and seal the pore of metal film by the sealing agents. Therefore, the control of concrete surface treatment and water content ratio are necessary to secure the bond strength of metal films.

• Journal of the Korean Society of Food Culture
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• v.7 no.4
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• pp.297-301
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• 1992

To investigate effects of the surface finishing methods (A : conventional press stone, B : enclosing in polyethylene (PE) bag, C : press-tone wrapped with PE film and D : covered with Chinese cabbage leaves 4cm in thickness on Kimchi) on Kimchi quality, pH-values, redness, film forming yeast growth, hardness and sensory quality of Kimchi during storage (for 60 days, at $10{\pm}5^{\circ}C$) in glass vessel $(11{\times}30cm)$ were investigated. pH of the top layer of A, C and D sample were higher than the optimum pH (4.2) of Kimchi, film forming yeast occurred on the surface of Kimchi, color of top layer Kimchi juice was darkened, and panel score of freshness and firmness was significantly worse (p<0.01) than that of sample B. However, in the case of Kimchi stored in PE bag (B), film forming yeast were can't detected visually in the surface of Kimchi, pH values were low as good quality Kimchi, freshness and firmness panel scores and hardness were significantly better (p<0.01) than A, C and D, and redness of juice of top layer of B was also preserved clearly for 60 days. Accordingly among the four surface finishing methods, the B-method was most effective in preserving of y of Kimchi.