The article presents the results of laboratory investigations regarding the performing of some reducing agents of Cr6+ for cement, which allow the manufacture of some ecological binders of high quality, according both for conditions imposed by the legislation in force and for elimination of inconveniences brought by ferrous sulphate used as a reducing agent of Cr6+.
Testing of reducing agents, for their characterization, was performed on unitary cements type CEM I and cements with additions type CEM II / A – S.
The obtained results allowed establishing of an optimal prescription of reducing agent, both from composition and its dosage point of view and of efficiency for reducing in time of Cr6+ from cement.