manufacturing process of cement and cement obtained by this process

摘要

A process for producing cement to be used when preparing an injection grout for prestressed concrete sheathes, comprising grinding together, at a temperature lower than 90 DEG C., Portland clinker which is free from any corrosive ions for steel, gypsum, an anhydrous water reducing additive and an also anhydrous cement set retarding agent, as well as cement obtained by means of this process and injection grout for prestressed concrete sheathes such as produced with this cement.