FIELD: construction.
SUBSTANCE: method to prepare concrete includes mixing of a binder, a filler and additives, tempering, laying the mix into moulds, compaction. For tempering a liquid is used, which is saturated with carbon dioxide, at the same time the mix is laid into a mould and compacted with ultrasound with frequency of 15-25 kHz, and in 3.5-4.5 hr it is again treated with the carbonated liquid.
EFFECT: higher hydraulic activity of a binder.
1 tbl, 1 ex
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