On the issue of water activation for Portland cement

The articles is devoted to the problem of Portland cement activity increase by changing its mixing water structure due to mechanical, magnetic, electromagnetic and certain other treatments. Known facts are analyzed on specific condition and behavior of cement grout liquid phase which is determined by the effect of crystalline field of the surface of cement minerals. The authors substantiated that this condition is more important for cement behavior under hardening than the consequences of eventual structural changes in its pretreated mixing water. An original method for controlling the hardening of cement paste based on measuring the hardness of cement samples is proposed. The method allows you to control the behavior of the material itself without taking into account the influence of the size and shape of the analyzed samples. (paper)