FIELD: chemistry; construction.
SUBSTANCE: invention relates to production and use of construction materials and articles, specifically to crude mixtures for production of carbonized construction materials and articles hardening in a medium with high concentration of carbon dioxide (CO2). Raw mixture for production of carbonized construction articles, including binder and carbonate aggregate, wherein said binder is dolomite cement obtained by firing a dolomite material at a temperature of not more than 750-850°C, and as filler - fine granularity of up to 5 mm secondary dolomite material obtained during crushing initial dolomite on sorted crushed stone fractions, with following ratio of ingredients by dry substance, wt%: dolomite cement 20-50; fine-dispersed secondary dolomite material 50-80, water in amount of 5-20% of total weight of binder and filler, and hardening of construction articles is carried out in medium of carbon dioxide with concentration of 30% for 180 minutes.
EFFECT: technical result consists in reduction of prime cost, expansion of raw material base for production of construction materials, reduction of CO2 emission, improvement of ecological situation of territories with considerable accumulation of various mineral secondary raw materials, in particular, fine dolomites with fraction up to 5 mm.
1 cl, 3 tbl
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Authors
Dates
2021-01-22—Published
2020-06-26—Filed