Items/ Indexes

National Standard

Cement MgO (%)

≤ 5.0

Cement SO 3 (%)

≤ 3.5

Cement loss on ignition (%)

≤ 5.0

Cement fineness (%)

≤ 10.0

Setting time (min)

≥ 45

Final setting time

≤ 600

Strength(MPa)

3-day compressive strength

≥ 16.0

3-day bending strength

≥ 3.5

28-day bending strength

≥ 6.5

28-day compressive strength

≥ 42.5