• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.359-362
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• 2003

This research deriving the lifetime distribution function of embank as one of main components in reservoir was carried out by mining the data of precise safety diagnosis in 1995 to 2001 as one of researches that were performed for determining the propriety for making item at design for planning and considering optimal maintenance strategy for service life through acquiring the system function of reservoir as main resource for irrigation and analyzing the life cycle cost of it.

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2004.11a
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• pp.130-130
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• 2004

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2004.11a
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• pp.132-132
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• 2004

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2004.11a
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• pp.134-134
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• 2004

• Proceedings of the Korea Concrete Institute Conference
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• 2005.11a
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• pp.153-156
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• 2005

It is not feasible for agricultural facility managers to estimate how severe damages are and what are causes of them when agricultural hydraulic facilities get damaged for some reasons. Moreover, it is nearly impossible for agricultural facility managers to take immediate actions to repair and reinforce the damaged structures. Thus, there have been needs for well-established systems to help agricultural facility managers understand its severity and causes, and take proper actions to reduce speed of deterioration and to repair/reinforce them. Thus repairing and reinforcing systems of agricultural hydraulic structures based on agricultural facility management policies, developed in this study, can be efficiently used in field works to determine top priority location and the budget of repairing and reinforcing projects if detailed information of damages in concrete structures and damage types are well compiled and classified with standardized image data complemented.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05b
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• pp.241-244
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• 2006

The basic prediction model was constructed to obtain optimal maintenance method for concrete structure under marine environment by exploring the mechanism of mono and combined deterioration in lab. This model was planned to be upgraded with data acquired from several exposure specimens under same environment as structures. The computer program developed to give useful guidance observer would be improved. Several repair materials and repair construction methods applied to exposure specimens will be tested for its performance of prohibit salt attack and freezing & thawing action during experimental period about ten years. All of these data could be available to complete the prediction system. The manager will be able to use the system for optimal maintenance of marine concrete structures.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05b
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• pp.261-264
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• 2006

Recently, the environment problems are risen to social problems. People have requested the convenience of a human activity and the enhancement of a human quality. The facility was, however, emphasized on the acquisition and treatment of water with the construction and maintenance of a irrigation and drainage structure. The concept of an environmental friendship has been introduced to change our society structure to an environment friendship at 21th century. But the concept lacks theoretical and systematic foundation. So, The maintenance technique, concrete products and construction methods will be made to be an environment friendship. The standards for environment friendship will be presented.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05b
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• pp.149-152
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• 2006

In this paper, we researched and compared the properties of steel slag(is divided with electric arc furnace slag and converter slag) as concrete aggregate by measuring physical and chemical characteristics of it. The steel slag mainly contains SiO2 and CaO as the chemical composition. The reaction with water and a little of free CaO in the slag causes slag's volume to expanse. Therefore, we used several aging methods in order to decrease the characteristics of slag volume expansion. The physical properties of steel slag aggregate is researched and then the strength of concrete with the steel slag aggregate is measured.

• Proceedings of the Korea Concrete Institute Conference
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• 2009.05a
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• pp.277-278
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• 2009

The building that supply tidal and splash zone was constructed near Seamangeum Gate Bridge. The specimens that will be tested for maintenance of gate bridge were exposed on the tidal and splash zone, totally about 650(Fig. 1). The characteristics of strength, salt penetration profile, field application of surface repair material and section recover material will be acquired by periodical test. The program was developed to obtain optimal maintenance strategy of gate bridge as a marine concrete structure and to deposit experimental data, lab. test result, field test result, on its D/B. On this paper, we hope to introduce two years exposure data as compressive strength, the modulus of elasticity, the modulus of dynamic elasticity, field adoption of repair and recover materials. As briefly speaking the results, possion's ratio, elasticity, strength was general, but the recover materials have some problems. There was crack between concrete and recover material and delamination figures.

• 한국전기화학회:학술대회논문집
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• 2003.11a
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• pp.169-176
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• 2003