Appropriate excavation material can be used for the production of concrete aggregates. This material is selected and its quality is controlled through a specifically designed testing method in an on-site construction laboratory. This method ensures that solely appropriate material is driven to the reconditionning process. Only an optimal multi-stages preparation process of the raw material (including crushing, screening and washing processes) guarantees that the end-product aggregates meet the requirements for the production of a high-quality concrete.
Fillers are easily transformed into high-quality aggregates for unbound materials.
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.