FIELD: mining industry.
SUBSTANCE: invention relates to the mining industry, namely to hardening filling mixtures, can be used in underground mining with backfilling of worked-out space. The hardening filling mixture includes, by weight. %: complex aggregate 55.5-70.0, Portland cement 13.0-19.4, water - the rest, while the complex aggregate includes: substandard very fine natural sand with a fineness modulus of less than 0.7 and increased, more than 15%, the content of clay and dust particles, wt. % 60-95, the rest is screening of blast-furnace metallurgical slag of fraction 0-5 mm.
EFFECT: reduced consumption of Portland cement while maintaining the appropriate compressive strength and the required spreadability of the filling mixture.
1 cl, 1 tbl
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| FILLING MIXTURE COMPOSITION | 2019 |
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