TY JOUR TI PHYSICOCHEMICAL JUSTIFICATION OF OPTIMAL THERMAL ACTIVATION AND DISPERSITY PARAMETERS OF KARA-KECHE CLAY FOR THE PRODUCTION OF AN ACTIVE MINERAL ADDITIVE KW thermal activation of clay KW Kara-Keche clay KW active mineral additive KW phase transformations KW amorphization KW dispersity KW X-ray diffraction analysis KW microstructure JO Technique and technology of silicates AU Dzhusupova, M.A. AU Bolotov, T.T. AU Omurbekov, I.K. AU Kozhakhmet, M.S. AU Sarsembayeva, D.E. PY 2026 IS PB Individual Entrepreneur Svetlana Vasilievna Samchenko