Organic anion exchange resins, loaded with99Tc pertechnate were incorporated into polymer modified cements and BFS/OPC(9∶1) cements. The composites formed were tested
for initial compressive strenghts, underwater and radiation stabilities and leach rates. IAEA standard leach testing was with
simulated sea and ground waters. Ground water leaching was also carried out on composites subjected to 1.1 MGy (γ). Polymer
modified composites performed better than the BFS/OPC mix under all the conditions studied and, in most cases, were able to
encapsulate high resin loading.