Direction for use: 1.Dryness and ventilation should be kept in cement storage. No damp. 2.Concrete cement should be blended evenly. Mechanical mixing and vibration are preferred 3.Concrete cement should be cast in time after mixing within 2 hours. Remixing of fianl-set concrete cement should be strictly prohibited. 4.Maintenance should be done in time after the concrete cement is cast to keep the concrete cement wet, which shouldn’t be less than 7 days. 5.Applicable to concrete cement projec tof cast press polish. The construction mode of repress polish with dry cement on surface of the concrete cement is forbidden. 6.Blending of cement of different varieties and manufacturers are forbidden. 7.Lime paste or hydrated lime should be adopted in construction of mortar mixing. Application of calces is forbidden. 8.When adopting external reactant, varieities and quantity of the external reactant should be confirmed through experiments for adaptability between the external reactant and cement.