5. Technique for treating coal shale with road binder

The results obtained from the first test plots, carried out using a pulverizer, rapidly confirmed the laboratory studies. As a result, the initially envisaged use of a fixed plant was abandoned in favor of mobile workshops.

• Workshop organization

  Depending on the application, the shale was processed :

  • or for excavation (transport of treated materials);

  • or backfill (transport of raw materials).

  For the subgrade of the multimodal platform treated with 6% excavated material, the treatment workshop was organized as follows, in 40 cm thick passes:

  • use of a scarifier to decompact the soil and detect any mining waste (timber, scrap metal, conveyor belts, etc.);...