由北京东海防腐防水公司研究开发的 ,‘东海牌管道内衬防腐防水砂浆’或称改性水泥砂浆于2 0 0 0年 1 2月 2 1日通过国家建材局主持的鉴定。多年来管道内防腐一直沿用普通水泥砂浆衬里 ,施工时多是现场掺料就地搅拌 ,这种操作往往使普通砂粒、砂中含泥量、含水量很难达到ＣＥＣ By Beijing Donghai anti-corrosion waterproof company research and development, ’Donghae pipeline lined with anti-corrosion waterproof mortar’ or modified cement mortar on January 21, 2000 through January 21, presided over the National Building Materials Bureau identified. For many years, the pipeline anticorrosive has been used ordinary cement mortar lining, when the construction site mixing is more than mixing, this operation often make ordinary sand, clay content in the sand, the water content is difficult to reach CEC