The leading products in our company are portland cement clinker and high-grade cement. The main general cements which produced by our company are portland cement, ordinary portland cement and portland slag cement. They are divided into three grades: P.O52.5、P.O42.5、P.C32.5. Application scope: P.O 52.5 can make high-grade , super high-grade concrete and large span beams and so on. Items Units Specification Test Results Test Method SiO2 % ≤ 22.0 21 EN 196-2 Al2O3 % - 5 Fe2O3 % - 3.1 CaO % ≥ 60.0 61 MgO % ≤ 5.00 2.75 SO3 % ≤ 3.5 2.75 K2O % - 0.45 Na2O % - 0.15 R2O (TOTAL ALKALI) % - 0.45 Loss on Ignition, (LOI) % ≤ 5.00 2.5 Insoluble Residue % ≤ 5.00 0.55 Chloride content % ≤ 0.10 0.02 EN 196-21 http://www.akwchina.com