Natural marble is radioactive

by:KKR Stone     2020-08-30
Stone radioactive refers to stone radium, thorium and potassium in three kinds of radioactive elements produced in the process of decay of radioactive material, mainly for the 'radon' gas. Stone radioactive refers to stone radium, thorium and potassium in three kinds of radioactive elements produced in the process of decay of radioactive material, mainly for the 'radon' gas. Such as can decay material content is too large, or the specific activity of radioactive material is too high, is harmful to human body. At present the world basically made the stone material of the radioactive standard. Look from the value standard, standard between China and Poland is most strictly. According to the national building geological prospecting center, the ministry of health of industrial hygiene laboratory test data show that the solid surface stone of specific activity is higher than the solid surface sheets for sale and SLATE; From the stone color, specific activity from high to low in turn to red, meat, red, gray, white and black stone. But the vast majority of our tested stone material is safe. According to the building materials industry standards promulgated by the national building and the ministry of health of the JC518 - 93 radioactive protection classification control standard 'natural stone products, stone at the radioactivity specific activity is divided into A, B, C three categories, each category has classified control values, and A, B, C three categories belong to conform to the standard of stone, just use range is different. Standard: radioactive specific activity is relatively small as A kind of stone material, its use range is not restricted; Radioactive relatively high specific activity for class B stone material, in addition to the inside surface should not be used in the bedroom, can be used for all other inside and outside of buildings facing; Radioactive high specific activity for class C stone, only can be used in the outside of the building facing, seawalls, piers and stele, garden decoration materials, etc. Therefore, cannot be said in general B and C type of stone is overweight stone.
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