Production of Rca

Concrete pavement recycling is a relatively simple process that involves breaking, removing and crushing hardened concrete from an acceptable source to produce recycled concrete aggregate (RCA). The formal process of RCA production typically involves an initial evaluation of the existing source concrete; pavement preparation, which may include removal of an asphalt overlay; pavement breaking, removal and transport to a processing facility; removal of any embedded steel such as dowel bars, tiebars, reinforcing bar, or wire mesh; crushing and sizing operations similar to those used for virgin aggregate production; bene ciation to improve the quality of the RCA, if necessary; and stockpiling of the freshly produced RCA. If desired, the RCA also can be produced in-place in the eld. More about these topics is available in ACPA’s EB043P, “Recycling Concrete Pavements.”