FIELD: building industry. SUBSTANCE: mortar has the following components, wt. -%: quartz glass, 48-52; refractory clay, 13.3-13.7; zirconium dioxide, 28-32; ortho-phosphoric acid, 6.3-6.7. Properties: apparent density is 1.7-1.85 g/cm3, caking point is 1100-1200 C. Mortar is used in electrical engineering and electrovacuum industry as an antigluing cement putty. EFFECT: improved quality of mortar. 1 tbl
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