Physicochemical evaluation of chalk limestone subjected to tribochemical activation with or without a promoter of adhesion and strengthening is given. The powder materials processed in an electro- magneto-mechano-chemical reactor have undergone evident transformations, which increased their capacity to react and which involved: • creation of additional network effects, • formation of new surfaces which, due to deformations, are particularly reactive, • development of additional network deformations due to the increased surface to volume ratio. Dispersion and particle morphology were studied by scanning electron microscopy (SEM) and dynamic light scattering (DLS), moreover tap and bulk density, capacities to absorb water and dioctyl phthalate were evaluated. The chalk samples ground in the electro-magneto-mechano-chemical reactor demonstrated highly uniform granule size, usually smaller than 1 μm, measured by SEM and DLS.