Study of mineral additives for cement materials for 3D-printing in construction

Abstract

The present work provides the results of a study of the effect of thermally activated brown coal fly ash from the coal basin in Podmoskovye, microsilica, Crimean shell rock flour and quartz flour on the rheological and physical and mechanical properties of the model system (of the cement mixture) in order to select the most effective mineral components for cement materials for 3D-printing. Optimization of the structure in order to form a dense and tight structure of high-quality concrete on cement binders can be carried out by introducing fine mineral additives of different material composition. In the presence of polycarboxylate plasticizers, such additives allow to regulate the mobility of cement systems at constant W/C ratio. At the same time, the increase in strength characteristics can be achieved both by introducing reaction active additives (microsilica, fly ash, shell rock flour) and components that perform the structural and topological function (shell rock flour, quartz flour). The effectiveness of regional mineral additives for use in cement systems is presented.