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Roman FEDIUK, Aleksey SMOLIAKOV, Roman TIMOKHIN; Mechanical activation of components in production of composite astringents; Advanced NanoMaterials and Technologies for Energy Sector; 2017:1(1): 47-54
The article presents the mechanical grinding of building materials in various mills by nanopowder. During mechanical activation of composite binders, the cement minerals active molecules arise when molecular defects are destroying in the packaging areas and the intermolecular forces of metastable decompensating phase are destruct. The process is accompanied by a change in the kinetics of solidification of Portland cement. Mechanical processes in the mineral materials grinding, together with increase in their surface energy, cause increase in the Gibbs energy of the powders and, accordingly, their chemical activity, which also contributes to high adhesion strength when contacting binders with them. Thus, the mechanical activation measures allow better use of the filling components properties and adjust their properties. At relatively low costs, it is possible to provide impressive and, importantly, easily repeatable results in the production.