Express-method of determination hidroactiviti of Portland cement

Abstract Basic problems are touched for existing methods of Portland cement binding properties control. Some of them consist in the fact that direct methods for Portland cement clinker and Portland cement physical-mechanical activity determination are too time-consuming, which does not enable timely correction of their properties directly in the course of production process. Others are connected with insufficient definitiveness of cement behavior with water depending on the value of its phase-forming minerals condition regulated parameters in their totality. We introduced the term “hydroactivity of Portland cement” for quantitative characterization of its part capable under certain conditions to transfer to liquid phase after cement mixing with water. An instant control method for produced Portland cement was developed based on direct connection between its hydroactivity and binding properties. Terms were substantiated for binder material hydroactivity determination under which the obtained results characterize more exactly the initial condition of material under analysis. A stage-wise description is given of application of the proposed shortcut method of hydroactivity determination for Portland cement clinkers, various classes of Portland cement and certain model systems. The proposed control method for properties of Portland cement clinker and Portland cement enables production of cement with assured activity under optimal relation between production expenses and obtained product quality.