Teruyoshi Hirano¹ Yhuki Katakami¹ Satoru Hashimoto¹ Ichiro Hatsumura¹ Tsukuru Nishitsunoi¹ Yaoki Yamashita² Yasuyuki Mori²

1, GGK Inc, Tokyo, , Japan
2, REMIKKUMSRUHACHI Co., Ltd., Senbiki, Seki-city, Gifu, Japan

We developed shielding concrete as a building material that shields the influence from radioactive materials and radiation. This concrete is a material compounded with Anti-Sievert® (high density ceramic material). Conventionally, when Anti-Sievert® is blended, concrete requires high concentration of water. Therefore, sufficient concrete strength could not be realized.
We developed Anti-Sievert® concrete blended with high performance water reducing material and optimized the formulation of cement, water, aggregate, sand, Anti-Sievert® 210, Anti-Sievert® 216 as a material constituting concrete ¹⁾. As a result, we realized shielding concrete with high fluidity to realize construction suitability by concrete pump. The Anti-Sievert® Concrete has a shielding function of about 3 times as compared with ordinary concrete for X-ray (200 kV) and shows strength exceeding 50 N / mm².
In this presentation, we will show the results of the durability by estimating the construction of a nuclear explosion shelter using the Anti-Sievert® concrete. This shelter has the shielding effect with the Anti-Sievert® concrete and utilizes the characteristics of high strength material exceeding 50 N / mm². In this presentation, we report the X - ray shielding function and strength simulation of the Anti-Sievert® concrete shelter. These results of the simulations show that the Anti-Sievert® concrete is a practical material having sufficient strength as a nuclear explosion shelter and has excellent X-ray shielding function.

１）I. Sato ，T. Hatakeyama, Y. Yamashita, Y. Mori, S. Hashimoto, I. Hatsumura, Y. Katakami, T. Nishitsunoi, T. O. Hirano, Development of X-ray Shield Concrete for Secure Safety Against the Impact of the Fukushima Accident, MRS Fall meeting 2017