Mechanical and Hydraulic Properties of Recycled Concrete Aggregates Mixed with Clay Brick Aggregates and Particle Breakage Characteristics for Unbound Road Base and Subbase Materials in Vietnam

The construction industry is one of the key industries with high potential for circular economy; promotion reuse and recycling demolition waste (CDW) essential sustainable urban development. In this study, a series compaction, California bearing ratio, saturated hydraulic conductivity, particle breakage tests well– poor–graded mixtures recycled clay brick aggregates (RCBs) concrete (RCAs) maximum aggregate diameters 19, 25, 37.5 mm were carried out to examine practical application those unbound roadbed materials in Vietnam. experimental results suggest that amount RCBs added RCAs should be less than 30% when applied materials. addition, it was found mixing proportions diameter, gradation aggregates, initial moisture condition control conductivity. Further, characteristics under compaction carefully examined, percentage increment/decrement, as well newly introduced method estimating fine fraction (<2.36 mm), effective understanding mechanism RCA RCB mixtures.