ACCELERATOR FOR MINERAL BINDING COMPOSITIONS

Abstract

The present invention describes additives for mineral binder compositions, in particular accelerators for mineral binder compositions, particularly cementitious binder compositions. The accelerator comprises from 35 to 99.7 wt% of at least one mineral filler F with a particle size D50 <5 µm, preferably <4 µm, more preferably <3.5 µm, from 0.3 to 65 wt% of sodium aluminate SA, and from 0 to 4 wt% of at least one other inorganic compound I selected from the group consisting of calcium aluminate cements and / or alkali or alkaline earth metal sulfates. The present invention also describes the corresponding mineral binder compositions, as well as uses and processes, including accelerating the setting and curing of mineral binder compositions at low temperatures. It further describes the processing steps for the production of the accelerators of the present invention.