The possible applicability of ceramic waste as partial replacement of Portland cement was studied. For this purpose, two ceramic wastes and two Portland cements of different countries (Argentine and Czech Republic) were analysed. After characterization of the materials used (chemical and mineralogical composition and specific surface), the effect of ceramic waste replacement (8, 16, 24, 32 and 40 % by mass) was analyzed. The pozzolanic activity, the heat released rate and the hydration products were determined at 2, 7 and 28 days. Results show that ceramic wastes have pozzolanic activity with both portland cements. At early age, the dilution effect governs the properties and finally the pozzolanic reaction improves the performance of blended cements.