The purpose of this experimental study is to chloride ion penetration resistance performance of concrete using Nano-TiO2 Carrier. As a result, concrete using Nano-TiO2 Carrier was confirmed to be superior than ordinary concrete and commercial TiO2 concrete chloride ion penetration resistance performance.

The purpose of this study is to investigate the mechanical properties of cold-mixed recycled asphalt (CMRA) using Nano-TiO2 carrier. As a result, mechanical properties of CMRA using Nano-TiO2 carrier was confirmed to be superior than CMRA using commercial TiO2. Also, it was confirmed to be performance of equal or higher than of existing technology.

인장강도가 2,400 MPa인 강연선이 개발되어 콘크리트구조기준 및 KS 규격에 반영되었다. 고강도 프리스트레스트 강연선이 구조물에 적용되기 위해서는 그에 적합한 정착시스템이 함께 사용되어야 한다. 최근에 2,400 MPa 강연선 적용을 위한 포스트텐션 정착구의 개발이 진행되어왔으나, 성능평가에 대한 연구가 미비한 실정이다. 따라서 본 연구에서는 2,400 MPa 강연선을 적용한 포스트텐션 정착구 중 가장 활용도가 높은 9 가닥, 15 가닥, 19 가닥 정착구에 대하여 PTI의 Anchorage Design Zone에 의한 국소구역 구조검토를 실시하였고, ETAG013 및 KCI-PS101에 의한 하중전달성능평가를 수행하였다. 또한 비선형 수치해석을 통해 시험의 적절성을 분석하였다. 그 결과, 2,400 MPa 정착구는 국소구역의 구조성능을 만족하고, 하중전달성능 조건을 만족하는 것으로 나타났다.

The purpose of this experimental study is to investigate performance for atmosphere purification of concrete sidewalk block using high performance Nano TiO2 Carrier. As a result, concrete sidewalk block using high performance Nano TiO2 Carrier was confirmed to be superior than commercial TiO2 concrete sidewalk block to atmosphere purification.

The purpose of this experimental study is to investigate the influence of chemical resistance of porous concrete using high performance nano TiO2 Carrier. As a result, porous concrete using high performance nano TiO2 Carrier was confirmed to be superior than ordinary concrete and TiO2 concrete chemical resistance.

This study is to prepare prediction method of the durability establishment for the effective maintenance of reinforced concrete substation structures. For this study, we investigated research trends about the foreign practices relating durability design.

In this paper, the effect of steel fiber-reinforced cement composite (SFRCC) on damage resistance of steel tube member. Test results show that the cumulative energy dissipation of SFRCC specimen was about 14% higher than that of Con specimen.

The coupling beam is recognized that critical structural elements, those whose yield strength is likely to be exceeded in the event of a severe earthquake, should be designed and detailed to exhibit large ductilities and stable hysteretic loop. As a result, the alternation reinforcement details of reinforced concrete coupling beam was investigated.

The purpose of this experimental study is to investigate the application of materials of construction using TiO2. The functional Al2O3-TiO2 carrier powder was fabricated by sol-gel method, this is mixed in a cement mortar. As a result, compressive strength of mortar using Al2O3-TiO2 powder was confirmed to be superior than mortar using ordinary TiO2.

The purpose of this experimental study is to investigate the application of materials of construction with MWNT and TiO2. high performance nano MWNT-TiO2 carrier was fabricated by sol-gel method and performance analyzed by XRD and SEM. As a result, high performance nano MWNT-TiO2 carrier was no significant differences in coating state, crystallinity and microstructure.

In this study, Early compressive strength analysis of low carbon mortar using industrial byproducts and describes relationships between strength property and CO2 indices to evaluate eco-efficient of low carbon binder mortar. Based on the results, this study is to give fundamental data for ability of eco-efficient low carbon binder.

This paper describes the experimental results for the structural performance of full-scale coupling beams with different reinforcement layout (diagonal and horizontal). For the reinforcements of the coupling beams, high-strength steel bars(SD500 and SD600) were used in order to improve workability and economic feasibility. The rigid steel frames and linked joints were used to maintain the clear span length (distance between both shear walls) of the coupling beam during the cyclic loading. Experimental results indicated that the diagonally reinforced coupling beam specimen could exhibit more ductile behavior compared to horizontally reinforced specimen. ACI318-14 code is applicable to design of coupling beam with diagonally reinforcement, however, that is overestimating the strength of horizontally reinforced coupling beam. It is remarkable that effective elastic stiffness values of both reinforcement details coupling beam significantly lees than ASCE 41-13.

The purpose of this experimental study is to investigate the application of materials of construction with MWNT and TiO2. high performance nano MWNT-TiO2 carrier was fabricated by sol-gel method and performance analyzed by XRD and SEM. As a result, high performance nano MWNT-TiO2 carrier was no significant differences in coating state, crystallinity and microstructure.

In this study, Early compressive strength analysis of low carbon mortar using industrial byproducts and describes relationships between strength property and CO2 indices to evaluate eco-efficient of low carbon binder mortar. Based on the results, this study is to give fundamental data for ability of eco-efficient low carbon binder.

In recent year to improve the seismic behavior of conventional link beams, some efforts have been made by providing special reinforcement material, or using steel link beams as substitutes. In this study to facilitate the constructability and meanwhile ensure desirable seismic behavior, an innovative type of replaceable steel frame link beam was conceived and studied

Coupled shear wall systems, which consist of two or more in-plane shear walls interconnected with link beams, are frequently used in medium and high-rise buildings. In this study, an innovative type of replaceable steel angle for link beam, was conceived and studied.

As viable substitutes for reinforced concrete link beam, the use of alternlate link beam and composite coupling beams have also been investigated by several researchers. In this study to enhance the post-damage repair capability of the link beam, a different type of replaceable link beam with angle connection was investigated.

The purpose of this study is to investigate the field application of Permeability recycled asphalt using Waste Asphalt Concrete and Resin. After the test construction, it was not cause problem, such as this stripping, falling and crack of pavement. Also, it was confirmed to be performance of equal or higher than of existing technology.

The study is aims at determining mechanical properties of pva fibers reinforced cement composite with recycled materials to overcome problems of plain concrete. The cement composites were evaluated using different ratio of recycled materials

This paper describes the influence of recycled materials on the flowability of steel fiber-reinforced cement composites. For the FRCC, fly-ash and recycled sand were used as recycled materials. The recycled materials were mixed with replacement ratios of 25% and 50%. As reinforcing fiber for the FRCC, micro steel fibers were used. Based on the test results, flowability of FRCC was improved when fly-ash was replaced. Increase of recycled sand had FRCCs exhibited lower flowability.