AKW group as a the bigest cement manufacture in china ,produce qualified cement with rich experience in this industry for 3 decades. P.O 42.5 can be used in a variety construction projects, such as bridges, wharfs, roads, high-rise buildings, general industrial and civil buildings. It can make different grade concrete from C30 to C80. Technical Index of 42.5 grade cement Items/ Indexes National Standard Internal controlled indexes Cement MgO (%) ≤ 5.0 3.8 Cement SO 3 (%) ≤ 3.5 2.3 Cement loss on ignition (%) ≤ 5.0 2.01 Cement fineness (%) ≤ 10.0 1 Setting time (min) ≥ 45 190 Final setting time ≤ 600 245 Strength(MPa) 3-day compressive strength ≥ 24.0 25.3 3-day bending strength ≥ 4.0 5.1 28-day compressive strength ≥ 42.5 47.5 http://www.akwchina.com