ABSTRACT
Abstract In the latest 10 years the Danish Government has supported much research and development within the field of demolition and recycling of building waste material. This paper describes a recent demonstration project comprising tests of different demolition techniques with a conclusion on the most appropriate fragmentation of reinforced concrete with respect to recycling of concrete and reducing the loads on the environment and the dynamic loads on the structure itself. Keywords: Demolition, Concrete-recycling, Blasting, Dynamic Loads, Vibrations, Fragmentation, Shockmeasurements
1. Introduction
In connection with the demolition of a motorway bridge in Nyborg, Denmark, a project on fragmentation and recycling of concrete has been carried out. The bridge was constructed so that the motorway would cross the railway at an angle of 20°. The bridge deck was constructed of a continuous concrete slab over two free spans of 25 m. The deck was heavily reinforced with both post tensed and non-tensed rein forcement bars. The total amount of solid materials gives approx. 11,000 tons, whereof approx. 500 tons are steel.
