Generally Portland cement (GOST 10178 or GOST 31108).
You can download the full text from the Moscow Government Portal (PDF) . gost 26633 2017 skachat pdf
Heavy concrete must fall within 1800–2500 kg/m³ . Generally Portland cement (GOST 10178 or GOST 31108)
Capacity to resist water pressure (e.g., W6, W8). Material Requirements: B25 (approx. M350)
View the standard with latest amendments (including 2022 corrections) on Docs.CNTD . Technical Archive: Access via Meganorm . 🏗️ Technical Overview
Common classes include B15 (approx. M200), B25 (approx. M350), and B35 (approx. M450).
If you are looking for older versions for historical or renovation projects: