Concrete aggregate production with TBM muck explained on the alptransit tunnel projects

摘要

Natural sand and gravel deposits are not inexhaustible. The further processing of suitable tunnel muck for concrete aggregate and other chip products has economicadvantages in addition to ecological political ones. An optimal recycling of material extracted from underground excavations calls for suitable working methods, practical and site-oriented suitability tests of the raw material, correctly selected preparation processes and finally ideal mix design of concrete with crushed aggregates.