Spoil management plays a key role on large underground construction sites. Objectives of the spoil management concept are to quantitativelly and qualitatively describe the incidental mineral commodities and to identify potential industrial uses for them. These concepts should also point out quantitative statements, i.e. on the amount of produced and transported material, on the surface area required for the plant infrastucture and deposits, logistics and transports. Finally, spoil management concepts should also contain indications about socio-economic and environmental impacts of the construction site.
A well organised spoil management has a positive effect on the population. It indeed indicates that the client and the construction company are concerned about the effects of the construction site on the residents and environment.
The raw material can either be selected for personal uses or given to third parties. With regards to the stone quality, the spoil management concept shows which rock serie is adequate for producing concrete or mortar aggregates (aggregates) and/ or aggregates for unbound and hydraulically bound materials (filling material). Wether an internal processing of the raw material is needed depends on the geological and geographical situation of the construction site.
Since 2021 B+ G supports a consortium for the tender of the material management lot. Based on our experience, the raw material is continuously tested in the construction site's own laboratory.
Concrete tests with sulphate-containing aggregates (produced from tunnel excavation) and special binders were carried out in the Modane intermediate attack on 7 April 2016.
Among other things, the sulphate resistance is to be investigated.
The new Spitallam dam in the Bernese Oberland will require around 200,000m3 of concrete. The mass concrete consists of a maximum grain size of 125mm! A gravel plant was built for the production of the aggregates. B+ G supports the client KWO in the quality of raw materials, aggregates and concrete.