This paper deals with design of rapid hardening Portland cement compositions
modified ultrafine mineral additives, polycarboxylate type superplasticizer, alkalicontaining
activator. Nanoparticles relating to microheterogeneous systems are
characterized by high values of specific interfacial area and “excess surface energy”
and promote more complete synergic effect of other components activity. The possibility
of increasing of liquid phase alkalinity due to interaction of sodium sulphate
and calcium hydroxide in the presence of such ultrafine aluminium containing additives
as metakaolin was established.