In this work, the effect of microwave (WV) radiation on the structure of distilled water is investigated, which is proved by the change in its electrical conductivity and coefficient of viscosity. Intensification of chemical processes with microwave radiation is the result of the electromagnetic field affecting the solvent and interacting substances. The process of hydration of semi-aquatic gypsum, which was closed by microwave-treated water with different values of the inputted energy in comparison with the control sample, was studied by the electric resistance measurement method. The kinetics of hydration and hardening of gypsum suspension was also studied. Differentiation methods yielded curves characterizing the stages of hardening of a gypsum binder: dissolution, colloidation, coagulation and crystallization. It is proved that, depending on the amount of microwave energy absorbed by distilled water, the duration of gypsum hardening processes changes. Optimal modes of microwave water treatment have been selected, which help to regulate the hardening process of gypsum binders. It is considered that to shutting gypsum binders, it is advisable to use a shutter with reduced electrical conductivity and, accordingly, with a minimum value of the viscosity coefficient. The destruction of the water structure or its change due to the influence of the microwave field will apparently influence the structure formation during hardening of the gypsum samples and, as a consequence, the change in their strength. The physic-mechanical properties of gypsum samples (bending and compression strength) are studied. The application of microwave radiation during processing of distilled water intensified the hardening process of semi-fluid calcium sulfate, contributed to an increase in the strength characteristics of the finished gypsum samples. The results of the experiment testify show the promising use of microwave water treatment, for the subsequent blocking of air binders and the obtaining building materials of greater strength.Forcitation:Pavlenko V.I., Lapteva S.N. Study of process of hardening of gypsum binders, mixing by water, activated by microwave electromagnetic field. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 8. P. 47-52.