PROCESSING OF CONCRETE WITH HIGH PERFORMANCE SONIC IMPULSES

摘要

The paper describes a method for processing of concrete rubble. This method uses high performance sonic impulses as crushing tool, which are generated by an electrical discharge under water. The caused stress acts directly at the interfacial transition zone of the concrete. The stress can be dosed more precisely, because the energy input is at the whole surface. The experiments show that a high percentage of cement paste free aggregates can be produced. From the material science point of view it is remarkable, that the stress-strain behaviour of different types of concrete is reflected in the grading curves and the content of cement paste of the fractions of the crushed concrete.