RAW MIX FOR PREPARING PORTLAND CEMENT CLINKER HAVING SET MINERALOGICAL COMPOSITION Russian patent published in 1999 - IPC

FIELD: petroleum and gas extractive industries, grouting of wells, making of road and aerodrome coatings, construction of port structures. SUBSTANCE: raw mix comprises carbonate and alumosilicate components and correcting ferrous additive. Carbonate components is essentially mixture of two carbonate components at ratios from 2:1 to 1:2. First component has titer of 85-95% and comprises 0.5-4.0 wt % silicon dioxide, and second component has titer of 65-80% and comprises 5-12 wt % silicon dioxide. Ratios of components in raw mixture are as follows (wt %): 60-90 carbonate component, 60-90; alumosilicate component, 9- 38; correcting iron-containing additive, the balance. EFFECT: cement with improved sulfate-resistant and accelerated rate of early strength in 3 and 7 day age. 3 tbl