Experimental Study on the Long-term Performance of TiO2 Concrete for Road Structures

ABSTRACTIn the area of high traffic volume, such as expressway across large cities, the amount of nitrogen oxides (NOx) emitted into the atmosphere as air pollution can be significant since NOx gases are the major cause of smog and acid rain. Recently, the importa nce of NOx removal has arisen in the world. Titanium dioxide (TiO 2 ), that is one of photocatalytic reaction material, is very efficient for removing NOx. Therefore, application of TiO 2 concrete is a good alternative in order to remove NOx which is a main cause of air pollution. This experimental study aimed to evaluate the long-term performance of TiO 2 concrete such as NOx removal efficiency due to performance period and environmental resistance for application of road structures. It was found that the TiO 2 is reasonable applicable on the road structure because TiO 2 concrete has a long-term performance.Key words : Titanium Dioxide (TiO 2 ), Nitrogen Oxide (NOx), Long-term performance, Environmental load resistance초 록대도시와 인접한 고속도로와 같이 교통량이 많은 경우 스모그와 산성비의 주요 원인이 되는 많은 양의 질소산화물이 발생하여 대기오염이 심각한 상황이다. 이에 최근 들어 전 세계적으로 질소산화물 제거의 중요성이 부각되고 있다. TiO