Radiation-induced alteration of sandstone concrete aggregate Ippei Maruyama, Amr Meawad, Toshiaki Kondo, Shohei Sawada, Patricie Halodova, Alica Fedorikova, Takahiro Ohkubo, Kenta Murakami, Takafumi Igari, Elena Tajuelo Rodriguez, Koki Maekawa, Kiyoteru

aggregate from grain to aggregate size order. We found that feldspar group grains are greatly affected by the expansion of quartz under neutron irradiation. And many intra-cracks are found in feldspar grains. This has a large influence on the macroscopic expansion of aggregate. In this paper, almost all the possible experimental techniques were used to understand how the multi-component aggregate behaves under neutron irradiation and find many inspiring data.