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CEMENT ADDITIVES » WEIGHTING AGENTS
GWA 1 Ilmenite, inert mineral, utilized to increase slurries density from 17.0 to 20.0 lb./gal; concentration is from 5 to 50 lb./sk of cement, slurry densities; no extra water is needed for wetting; specific gravity = 4.45.
GWA 2 Coarse-grind hematite, inert; increases slurry densities from 17.0 to 19.0 lb./gal; concentrations is from 5 to 35 lb./sk of cement; extra water needed for wetting; specific gravity = 4.95.
GWA 3 Barite utilized to increase slurries density from 16.0 to 17.5 lb./gal; ideal concentrations is from 4 to 50 lb./sk of cement; extra water is needed for wetting; specific gravity = 4.20.
GWA 100 Silica sand, 100 mesh, increases slurries density, reactive above 230°F (110°C); combats strength retrogression, optimum concentration is 35% BWOC; specific gravity = 2.65.
GWA 200 Silica flour, 200 mesh, increases slurries density; reactive above 230°F (110°C); combats strength retrogression, optimum concentration 35% BWOC; extra water needed for wetting; specific gravity = 2.65.
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