水泥42.5R

CHINA STANDARD GB175-2007 P. O 42.5NItems/ Indexes National Standard Internal controlled indexes Cement MgO (%) ≤ 5.0 3.80 Cement SO 3 (%) ≤ 3.5 2.30 Cement loss on ignition (%) ≤ 5.0 2.01 Cement fineness (%) ≤ 10.0 1.50 Setting time (min) ≥ 45 190 Final setting time ≤ 600 245 Strength(MPa)3-day compressive strength ≥ 16.0 25.60 3-day bending strength ≥ 3.5 4.9 28-day bending strength ≥ 6.5 7.2 28-day bending strength ≥ 42.5 47.2