Cement

Portland cement 42.5N Russian Standard GOST 10178-85, 30515-97 Class of strength (type): portland cement 400 (42.5N) Mineral additives: 28.6 % Normal thickness of the cement test: 26.2 Average activity with the steaming: 30.5 MPa Value of the specific effectiveness of the activity of the natural radionuclides: 59.7 Bq/kg, with the standard level no more than 60 Bq/kg.

The chemical composition of cement (%)

• Content of the oxide of magnesium MgO in clinker 2.50
• Content of the oxide of sulfur (THE VI) SO₃ 2.46
• Content of chlorion Cl- 0.002
• Mass fraction of the alkaline oxides R₂O 0,62

Mineralogical composition of clinker (%)

• Ca₃Si (tricalcium silicate) 68.69
• Ca₂Si (dicalcium silicate) 11.14
• Ca₃Al (tricalcium aluminate) 9.20
• Ca₄AlFe (dicalcium alumo-ferrite) 10.69