Assembly for preparing an injectable composition

An assembly for preparing an injectable sealing composition for the sealing of an anchor bolt in a dedicated recess of a rock structure, wherein the assembly comprises at least:

• at least one storage means of at least one first component, called silicate component, comprising at least one silicate resin-based liquid component,
• a storage means of a second component, called MDI component, comprising at least one liquid component based on diphenylmethane diisocyanate,
• a storage means of an organic or mineral filler,
• a device for generating a first mixture linked, on the one hand, to the storage means of the MDI component and, on the other hand, to the storage means of a filler, configured to produce a first mixture combining at least a quantity of the MDI component with at least a quantity of organic or mineral filler,
• a device for generating a second mixture linked, on the one hand, to the device for generating a first mixture and, on the other hand, to at least one storage means of at least the silicate component, configured to produce a mixture combining at least a quantity of the first mixture with at least a quantity of silicate component.