Heavy concrete must fall within 1800–2500 kg/m³ .
Generally Portland cement (GOST 10178 or GOST 31108). gost 26633 2017 skachat pdf
Common classes include B15 (approx. M200), B25 (approx. M350), and B35 (approx. M450). Heavy concrete must fall within 1800–2500 kg/m³
Measures cycles of freezing and thawing (e.g., F100, F200). B25 (approx. M350)