Thermal Behavior of Ceramic Bodies Based on Estonian Clay from the Arumetsa Deposit with Oil Shale Ash and Clinker Dust Additives

The thermal behavior of green clay samples from the Arumetsa and Füzérradvány deposits (Hungary) influence two new types Estonian oil shale (OS) ashes cement bypass dust (clinker dust) additives on it were objectives this study. Thermal thermo-dilatometric analysis methods applied using a Setaram Setsys 1750 thermoanalyzer coupled with Pfeiffer Omnistar spectrometer CS Evolution dilatometer. kinetic parameters calculated based differential isoconversional method Friedman. results clays blends indicated emission physically bound water at 200–250 °C. At temperatures °C to 550–600 release is caused by oxidation organic matter dehydroxylation different minerals like illite, illite-smectite, mica kaolin. From blends, in addition, also decomposition portlandite. CO2 these was result contained clays. In temperature range 800–900 °C, mass loss ongoing processes but mainly due carbonates OS clinker dust. These accompanied contraction expansion ceramic bodies corresponding changes SSA porosity values samples. Therefore, took place one step which steps. first, occurs, followed carbonates. value conversion-dependent activation energy E along reaction progress α varied for illitic between 75–182 9–206 kJ mol−1, respectively. For clay, first 14–193 5–205 second step, 15–390 135–235 respectively, indicating complex mechanism processes.