The purpose of this study is to investigate the effect of long - term deterioration factor of 12 months on 6 kinds of coating waterproofing materials (polyurethane 1, 2, acrylic rubber, polyurea, rubber asphalt, cement - As a part of the study to characterize the performance change in material aspect, the research was carried out on the tensile strength of the polyurea coating waterproofing material against the performance change in the long term exposure to the chemical erosion environment. As shown in the test results, it was mainly performed in an acidic environment, and it can be confirmed that polyurea is not resistant to acid. In the alkali and sodium chloride environment, the tensile strength after immersion for the last 12 months showed a decrease in strength within about 10% of the initial tensile strength, and it was confirmed that the resistance was excellent in an alkali environment.

Experimental results show that the maximum temperature of the floorboard surface is 1/2 level compared to the hot water temperature of 80℃, which is circulated by hot water heating. And the part above 10mm above the surface of the floorboard was low as 1/3 level. Therefore, in order to improve the heating efficiency of the room where the flooring is applied to the hot water heating, the thermal conductivity of the flooring material should be improved as well.

최근 시설물의 안전 및 유지관리에 관심이 증대되고 있으나, 발주처의 저가발주로 인해 안전진단전문기관은 부실화 되고 부실 점검 및 진단으로 인한 많은 문제점들이 야기되고 있다. 따라서 본 연구에서는 실무자들의 인식조사와 사례분석을 통해 실행대가 현황을 고찰하 였으며, 그 결과 정밀안전점검은 대가기준 조정보다는 대가기준의 효율성 증대 및 강제성 강화가 필요한 것으로 판단된다. 또한 정밀안전진단은 연면적 10,000㎡미만 시설물에 대한 대가기준 설계금액을 현재 기준에서 80%로 하향조정하고, 그 이상의 시설물에 대해서는 현행 대가기준을 적용하되, 대가기준의 강제성 강화가 필요할 것으로 판단된다.

The highest latent calorific value and total calorific value of MPCM and aqueous adhesive mixed samples were 44℃, followed by 50℃, 28℃ and 31℃. At 44℃, it is considered to be the most suitable for applying it as a component of the adhesive of the decorative wood floor plate because it is higher than the MPCM combination of other melting points. The remaining samples except for 44℃ showed an increase in latent heat and total calorific value when MPCM was added to the aqueous adhesive. The higher the amount of MPCM, the higher the viscosity effect

The purpose of this paper is to assess the effect of surface characteristic of GFRP rebar on concrete-reinforcement bond behavior. For sample preparation, 10 GFRP rebar with two types of surface conditions were used to fabricate 15×15×15cm sized GFRP reinforced concrete. Then, pull-out test was carried out on each concrete samples until the maximum bond strength was achieved. From the test result, it was found that the maximum bond strength at the lattice type is 1.38 times higher than that for unidirectional surface.

In this study, the compressive force is evaluated for the SMA surface reinforcement member which is to improve the bond capacity at cold-joint in PC member. As a result, the total compressive force can be estimated according to the number of wires.

BIM is an opportunity to implement construction IT. BIM has brought two changes. One is the change of geometric Information. It is the transition from 2D CAD to 3D model. The other is property changes. Requires conversion from data to information. This is a confergence of geometric information and attribute information, and BIM requires convergence in the construction work process. This study aims to present a method for activating BIM in Project management. The first task after the design is quantity take-off. The QTO is a process of converting the geometric information (Analog) into the attribute information (Digital). This QTO-database is important information that can be based on Project management. Therefore, it is necessary to construct information that is useful from QTO. It is WBS-CBS integrated information. BIM-based QTO refers to linkage between 3D model object and WBS-CBS. Through this study, we show the method of WBS-CBS integrated information based on BIM and show the applicability of BIM through actual case. This study is expected to be a basis for the successful implementation of BIM-based project management.

BIM은 지금까지 건설업무에 적용하는데 많은 시행착오를 겪어 왔다. BIM인 이슈화된지 10여년이 지났지만 활성화가 안 되고 있는게 현실이다. 본 연구는 철근콘크리트공사에 BIM적용을 제안하고자 한다. 철근콘크리트 공사는 건축공사비 중 가장 큰 비중을 차지하는 반면에 재료의 수가 적고 한정적이다. 또한 구조물 공사에 대한 모델링을 하여야 다른 모델링을 할 수 있으므로 철근콘크리트공사의 3D모델은 모든 3D모델링의 바탕이 되기 때문에 3D 모델링을 가장 처음 하여야 한다. 철근 콘크리트공사에 대한 수량산출 프로그램개발 및 사례를 통하 여 BIM기반의 철근콘크리트 공사에 지식기반의 수식DB를 적용하여 시공단계까지 활용할 수 있는 BIM기반의 산출정보를 구축하였고, 적용성을 검증하였다. 이로써 BIM기반의 타 공종도 구현 가능성을 제시함으로써 정보화, 지능화 시대에 건설산업도 BIM기반의 활성화가 가능하 다는 것을 확인하였다.

As a result to check basic physical characteristics of plyood and fabric board, both of them satisfied the criteria of KS F 3126 but hardened fabric board only showed changes in the absorption width expansion rate. This may imply that continuous expansion and swelling can occur if hardened fabric board is exposed to moisture for longtime, and it should be considered when selecting a product and mainteaning it.

As a result of abrasion resistance test of decoration wood-based flooring board laminated with PVC on plywood, compared to the flooring board laminated with general HPL surface decoration materials, it was available to secure far higher abrasion resistance. It seems to contribute to secure initial durability and maintenance of decoration wood-based flooring board as an important means, and it might be available for saving repair and maintenance costs due to flooring board issues.

The study was conducted to determine the structural optimization method through the estimation of the structure of the floor and the amounts of reinforcement in the apartment building and the amounts of reinforcement depending on the area. The purpose of this study is to examine the comparison of the comparison factors by comparing the comparison factors of the jointly constructed apartment house with each of the conditions.

In the case of Anchang Village, from the beginning of the project, public administration made an effort to have unique power by agreement with private organizations. Continue to be linked the civil society and the residents to protect the wisdom of the village and the policies of power generation from the start of the project. Even now the results are actively demonstrated. From this point, it is necessary to encourage private organizations to participate in future town planning projects. As a measure to that, it suggests that Corporate Social Responsibility within the region and local universities are to be linked the village.

In this study, the shake table test of the damaged reinforced concrete frame was carried out and the damage and dynamic response characteristics were evaluated. The static lateral-cyclic test for the specimen was followed by the dynamic test. As a result of the shake table test, damage was concentrated on existing cracks and the maximum inter-story drift ratio was calculated as 1.94% at the final excitation step.

In this study, the 1-directional tension tests were conducted to evaluate ductility capacity of splice rebar. As a result, the ductility of the reinforced concrete members embedded in the coupler was significantly lower than that of general RC members.

In this study, the 3 point bending tests were conducted to evaluate ductility capacity of splice rebar. As a result, the difference in ductility between RC members embedded in the coupler and general RC members was not significant. For more accurate analysis, 4 point bending tests are considered to be necessary.

Suggestions for improvement of allowable nailing stress according for wood: more diverse nail types need to be considered, especially the types most widely used in the field; different fiber directional properties must be differentiated also, future studies need to integrate much required design factors, for example by including the wood temperature/humidity into the integrated modulus, as wood is very sensitive to changes of moisture in the air.

The effect of loading on chloride penetration into concrete is evaluated in this study. It is found that the chloride pene- tration rates for OPC concrete and blast furnace slag BFS concrete under the tensile stress were increased by 29% and 77%, respectively. The diffusion coefficient of FA and BFS concrete was lower than that of conventional concrete without BFS, no loads and stress states. Under tensile stress, the diffusion coefficient for FA and BFS, plain concrete showed higher values with increasing stress. The influence of specific surface area on the diffusion coefficient was investigated. As a result, the larger the specific surface areas of BFS are the lower diffusion coefficients. This tendency was more pronounced under the high stress conditions. The chloride penetration depth was distributed uni- formly when no stress was applied. However, in the case of tensile loading, the diffusion depth was not distributed uni- formly, and showed prominent characteristics. This result indicates that analysis using average values of chloride pene- tration depth is not proper under load conditions.

The In the experiment on flow using sand walls, when white clay + sand was mixed with glutinous rice, traditional paper and seaweed as adherents and preventive measures for cracks, the flow was higher than other sand wall mortars. This indicates that it is effective in improving flow. Moreover, in terms of strength, a mix of white clay+ sand, traditional paper and flour had a greater strength than a mix of white clay + sand, straws and flour. In the experiment to test for cracks and shrinking during drying, a composition of white clay + sand + traditional paper showed fewer cracks and less shrinking than the walls where straws were mixed in.