PURPOSES: To ensure appropriate RCC properties with sufficient strength development and workability, it is necessary to secure a proper level of consistency. It is also necessary to secure maximum dry density, which is an important factor for increasing the interaction of aggregate interlocking, leading to an augmentation of RCC strength. On the other hand, the dry density of RCC can be changed owing to the compaction conditions, water content, and particle size distribution. A Proctor test and a modified Proctor test were used for determining the optimum water content needed to achieve maximum dry density with different amounts of compaction energy. A Vebe test, on the other hand, was used for checking the level of consistency, which is important for producing a workable mixture. METHODS : To confirm the degree of compaction at various particle sizes, RCC mixtures with different sand/aggregate ratios were evaluated. The Proctor test and modified Proctor test were applied to these mixtures to check the effect of the aggregate gradation and compaction energy on the maximum dry density and optimum water content. During each test, three specimens were produced for all types of water content under each aggregate gradation. A compaction curve and the optimum water content and maximum dry density for each aggregate gradation were then obtained for both tests. The range of water content for the appropriate consistency of each aggregate gradation was determined through a Vebe test. The optimum water content was then evaluated based on this range. RESULTS : The compaction test results show that the modified Proctor test provides a higher maximum dry density and lower optimum water content compared with the standard Proctor test. For the modified Proctor test, two cases of aggregate gradation (s/a = 30% and 70%) had the optimum water contents outside of the appropriate water content range. For the standard Proctor test, on the other hand, none of aggregate gradations provided the optimum water content within the desired range. CONCLUSIONS : The modified Proctor test should be used for an RCC mixture design because it can provide adequacy between maximum dry density and consistency. Moreover, the compaction roller has become highly developed for higher compaction energy.

에너지 절약과 CO2발생량의 절감을 위해 자전거의 이용을 적극 장려하고 있다. 이를 위해 다량의 신설 자전거 도로 건설 계획을 추진 중에 있다. 현재 국내에서 신설 자전거도로 건설을 위해 아스팔트포장 및 콘크리트 포장을 비롯하여, 반강성포장, 유색포장, 흙포장 등이 적용되고 있다. 하지만 이들 포장형식은 자전거도로의 요구 성능에 비하여 시공비용이 높다. 본 연구에서는 경제적이고 친환경적이며 내구성을 확보한 자전거도로포장으로써 롤러 다짐 콘크리트의 최적 다짐율과 배합비를 기초물성시험을 통해 검토하였다. 도출된 배합비에 대한 동결융해와 제설제 저항성 시험을 통해 환경저항성을 검토하였다. 추가적으로 경제성 및 CO2발생량을 일반콘크리트포장과 비교를 통해 평가했다.