LAUSR

Abstract This work designed and measured a remote sprayed fast-curing γ-radiation-shielding material that is used to encapsulate and collect radioactive wastes from places far away from high radiation areas in case of radioactive waste leakage accidents. The influence of the chemical composition design on curing time, shielding performance, thermal stability and mechanical performance of the γ-radiation-shielding material is discussed. Results showed that with the addition of catalysts, the cream time of the γ-radiation-shielding material increased remarkably to allow it to be ejected, while the tack-free time of the solidified composite material decreased to guarantee good encapsulation of the radioactive wastes. Due to the denser microstructure, the γ-radiation-shielding material with bis(2-dimethylaminoethyl) ether and phosphorus flame retardant V-490 show better γ-radiation-shielding performance and mechanical properties than other products. When the shielding functional filler content reached 60%, the composite presented excellent comprehensive properties and a good application prospect.