Performance of Rigid Pavements Containing Recycled Concrete Aggregates

摘要: State highway agencies in Connecticut, Kansas, Minnesota, Wisconsin, and Wyoming have successfully designed constructed rigid pavements containing recycled concrete aggregate (RCA). Success has been attributed part to the minimization of old mortar content RCA during recycling processes, thereby controlling total new portland cement (PCC) mixture, or achievement higher-than-expected compressive strengths through adjustments mix proportions, both. There was no clear correlation between cracking distresses field investigations, although one project did exhibit significantly more slab pavement than corresponding control pavement. The increased may due large differences sections. In general, PCC considered this study performed comparably with their conventional counterparts, including that incorporated derived from affected by D-cracking alkali-silica reactivity (ASR). is, however, evidence small amounts localized recurrent ASR Whether will eventually develop into widespread distress remains be seen.