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.

Background: This study was conducted to investigate the changes in the photosynthetic parameters, chlorophyll content, chlorophyll fluorescence, and growth characteristics of Aruncus dioicus var. kamtschaticus seedlings under different shading treatments. Methods and Results: The shading treatment was regulated with the shading level (non-shaded, 35%, 55%, and 75% shading). Photosynthetic activities, such as net photosynthetic rate, stomatal conductance, stomatal transpiration rate, and performance index on absorption basis (PIABS)were the highest under 35% shading (4.36 μ㏖ CO2·m−2·s−1, 54.2 m㏖ H2O·m2·s−1, 0.66 m㏖ H2O·m−2·s−1, and 1.3, respectively), and the lowest under 75% shading. This implies that the decrease in net photosynthetic rate may be due to an inability to regulate water and CO2 exchanged through the stomata. Thechlorophylla, b, and a + b contents were increased with elevating shading level and the chlorophyll a/b ratio showed non-significant differences. It was found that the dry weight (leaf, shoot, and whole) was the highest (1.14 g, 0.49 g, and 2.31 g, respectively) under 35% shading and the t/R ratio was the highest under 75% shading. Conclusions: It is concluded that 75% shading exhibited a strong reduction of photosynthetic activity, and 35% shading showed the best conditions for the early growth and cultivation of A. dioicus var. kamtschaticus.

스트론튬계 상전이물질은 특정한 온도에서 물질의 상태가 변함에 따라서 열을 흡수하거나 방출하게 된다. 본 연구의 목적은 스트론튬계 상전이물질의 혼입이 플라이애시 치환 모르타르 및 고로슬래그 치환 모르타르의 수화발열 및 역학적 특성에 미치는 영향을 실험적으로 평가하는 것이다. 스트론튬계 상전이물질의 혼입량은 결합재 질량의 1, 2, 3, 4, 5%로 하였다. 총 12개 수준의 모르타르 배합에 대해서 모르타르 흐름성능, 간이수화열온도상승, 압축 및 휨강도 실험을 각각 수행하였다. 실험결과 본 연구에서 사용한 스트론튬계 상전이물질은 모르타르의 수화열 저감 및 수화지연에 효과적인 것으로 판단된다. 특히 플라이애시 치환 모르타르의 최대온도 상승량은 고로슬래그 치환 모르타르의 최대온도 상승량에 비해 낮게 나타났다. 플라이애시 및 고로슬래그 치환 모르타르의 압축강도는 상전이물질 혼입량이 증가함에 따라 감소하는 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.

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 test was performed to verify the behavior of coupling beam using T-shaped steel for alternation of reinforcement details.

This test was performed to verify the failure mode of coupling beam using T-shaped steel for alternation of reinforcement details.

Coupling beam using L-shaped steel for alternation of reinforcement details was tested to evaluate energy dissipation capacity.

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.