Long-term cement corrosion in chloride-rich solutions relevant to radioactive waste disposal in rock salt - Leaching experiments and thermodynamic simulations

► Corrosion of 200 L sized cemented radioactive waste simulates analyzed for >20 years. ► Corrosion faster in experiments with MgCl2 brine than experiments with NaCl brine. ► Results of full-scale tests (after >20 years) agree with cement powder short-term tests. ► Thermodynamic calculations adequately simulate alteration of cement product in brines. ► Thermodynamic calculations enable to extend spatial and temporal upscaling.