#### STUDY OF CHANGE IN THE SCM'S STRENGTH PROPERTIES .

activation time in the Retsch PM 400 MA planetary ball mill, at a volume ratio of materials to grinding bodies of 1:1 and when introducing muscovite (from 1 to 6%) of the weight of the bentonite clay being studied is 90 sec. The zetapotential (electrostatic properties' resulting characteristic) has increased by % up to mV