ПОЛУЧЕНИЕ ВЯЖУЩИХ КОМПОЗИЦИЙ ДЛЯ БЕТОНОВ В ЦЕНТРОБЕЖНОЙ ПОМОЛЬНОЙ МЕЛЬНИЦЕ

Abstract

Abstract. The results of studies on the grinding of waste wet magnetic separation of ferruginous quartz-ites of the Lebedinsky mining and processing plant in a centrifugal grinding unit are given, their grinding features are established. Binder compositions are obtained at different ratios of cement and wet magnetic separation waste in a centrifugal grinding mill at different grinding modes. The features of grinding process-es are studied, the technological and physicomechanical properties of the obtained binding compositions are determined. The data obtained indicate that the use of mineral filler up to 10% provides compaction of the structure due to the presence of fine mineral filler, which will reduce the consumption of Portland cement to 10%. During mechanical activation of the compositions of binding compositions, a sharp increase in the con-centration of surface defects occurs, due to the violation of contacts between crystals with the rupture of sili-con-oxygen valence bonds. The activity of the wet magnetic separation waste of ferruginous quartzites is ap-parently due to the presence of a large number of exchange centers on their surface, a significant part of which are Bronsted acids and bases. The processes of hydration and the formation of cement with the use of binders requires further detailed study.