Abstract
Modern construction is characterized by the tendency of a growing share of ecologically safe materials and products. The methods of electro-physical and electrochemical action on water are promising for many industries due to the relative simplicity and environmental compatibility. Such methods are widely used for the activation of water mixing in the preparation of concrete, but their application for the activation of water mixing of gypsum binders are highlighted insufficiently. Using the anolyte and catholyte of tap water, electrochemically activated in the diaphragm electrolyzer as mixing water allowed not only to achieve the improvement of physical and mechanical properties of gypsum stone but also change the setting time of gypsum paste. It was established that the depth of electrochemical activation plays the defining role in such changes. Thus, the control of the activation depth determines the properties of a final product. The control method was proposed, which lies in tracking the changes of the strength of current in the activation process to ensure an optimal ratio of the components regulating the setting time and hardness of gypsum stone − calcium carbonate and calcium hydroxide.
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