Potential use of Argentine kaolinitic clays as pozzolanic material

Results indicate that four blended cements presented a very good pozzolanic activity evaluated by the Frattini test at 7 and 28 days and they have a different compressive strength with a SAI > 1 at 90 days. In these blended cements, the Ca(OH)2 released by cement hydration was consumed. Analyzing the incidence of factors on pozzolanic activity, it can be concluded that clays containing more than 50% kaolinite provide enough amount of reactive material, and that the rate of the pozzolanic reaction is improved when the kaolinite mineral present in the clay has a disordered structure.