The TEPCO Fukushima Daiichi Nuclear Power Plant has meltdown due to the huge earthquake and tsunami that occurred on March 11, 2011. As a result, radioactive substances were dissipated into the environment, which caused concern about continuous radioactive substances. In the future, it will be required to shield the influence from radioactive materials and radiation for a long time. In particular, concrete with enhanced radiation shielding function is required as building materials.
We have developed an additive for concrete that effectively shields radiation such as X-rays. The concrete having an excellent shielding effect has been realized by adding high density oxides, slag, tungsten and the like. Existing X-ray shielding concrete is deficient in strength and fluidity, and there was a big problem in construction situations. This shielding concrete additive can realize concrete blended with Anti-Sievert® (high density ceramic material). X-ray shielding concrete with high strength and excellent durability could be realized by blending Anti-Sievert® additives and Anti-Sievert® shielding materials.
In this presentation, we will show and discuss the properties of Anti-Sievert® additives and the properties of the concrete optimized for blending. These results show that Anti-Sievert® concrete is an excellent X-ray shielding material and is a practical material having extremely high durability and strength.