Efficiency of Use of Galvanic Sludge in Cement Systems

Abstract The use of waste products as accelerators of cement systems’ hardening is economically justified in case of their high efficiency. In this work it was shown that use of galvanic sludge which contains mainly oxides and hydroxides of aluminum, allows to accelerate processes of cement hydration and decrease setting time and increase the speed of strengthening. The best results of strength were obtained by joint usage of galvanic sludge and superplasticizers, because of its water-reducing effect in cement systems.