... .5 and 42.5R good quality and lower price Portland cement 42.5:Qingdao Kingway Construction Co., Ltd. is one of ... Shandong provinze, China. Our main sizes of cement are as follows:Product Type1.Portland cement: P.1.52.5R,P.Ⅱ42.5RApplicable ... ,high initial strength and freeze-thaw cycle.2. Ordinary Portland Cement: P.O42.5R,P.O42.5Applicable scope:Except aforesaid scope ...