Utilization of Muck as Concrete Aggregate

Abstract

Effective utilization of tunnel muck was discussed. In the system proposed by the authors, the muck is reused as concrete aggregate and the muck waste is considerably reduced. This muck utilization system was examined from economical and technical viewpoint. As the results of carefully investigation of tunnel muck, it was found that relatively small particle was short and the shape was not appropriate to concrete aggregate. Therefore the tunnel muck cannot be used directly as concrete aggregate and, at least, a simple crushing plant with an impact crasher and screens is necessary. The muck was gathered in a tunnel and several experiments and testing including crushing, sieving and quality verification were conducted to obtain the data required to discuss the feasibility of this system. Finally, it was found that utilization of tunnel muck as concrete aggregate is possible with reasonable benefit.