Electrodynamic Fragmentation as Treatment Prior to Concrete Comminution
Tatiane I. Hentges, Margarita Mezzetti, Christine Hecker, Oleg Popov, Pierre Landgraf, Sérgio C. Angulo, Luís M. Tavares, Holger LieberwirthABSTRACT
The aim of this work was to evaluate how different energy levels of electrodynamic fragmentation (EDF) affect concrete weakening. A reference concrete (Ref‐45) and another with a high limestone filler content (LF‐35) were produced and subjected to EDF at specific energies of 0.54, 0.83, and 1.67 kWh/t. A substantial reduction in strength was observed at the intermediate level for Ref‐45 (42%) and a smaller reduction for LF‐35 (7%). At the highest energy level, nearly half of the samples fragmented during EDF, and reductions exceeded 60%. However, fragment size distributions were not found to vary as a function of the concretes studied. At intermediate and high energy levels, EDF reduced concrete strength, which can improve the quality of recycled aggregates after comminution.