Recently, our Institute receives a letter of notice on the capability verification plan results sent by China Building Material Test &Verification Group Co., Ltd.; namely,the radioactivity testing capability verification for building materials completed by our Institute obtains satisfactory results.
Radioactive elements in building materials are mainly Ra (radium), Th (thorium) and K (potassium), which are pervasive in bricks, masonry units, sand, stone and cement products, etc. for main buildings and long-term exposure to which causes certain harm to human body.