THE ACTIVATOR INFLUENCE AT HARDENING PROCESS OF CEMENTITIOUS - POZZOLANA BINDING SYSTEMS

摘要

The paper aim is to study the influence of activator mixture, depending on its nature, on the hardening process of cementitious - pozzolana binding systems. The cementitious material was a melilite blastfurnace slag. Thermal power fly ash and volcanic tuff as pozzolana materials were used. As activators, mixtures of lime and calcium chloride and natrium sulphate were used. The pozzolana/(cementitious material+pozzolana) weight ratio were: 0, 0.1, 0.3 and, 0.5. The specific surface area of the components was 4000 cm~2/g. Chemical bond water content, calcium ions concentrations, and pH analysis were made on binding pastes or suspensions, as well as mechanical strength determinations on mortars. The obtained data were used to correlate the hardening binding systems behaviour and the activator nature.