In 1993, the National Building Materials Bureau together with the Ministry of Health formulated the "Standard for Controlling the Classification of Radioactive Protection of Natural Stone Products". According to the radioactive level of natural stone, natural stone products are divided into three categories: A, B, and C.
One: A product. The scope of use of such products is not limited.
Second: B products. This kind of stone products can not be used for home decoration, but can be used for the interior and exterior of all other buildings.
Three: Class C products. This type of product can only be used for the exterior of all buildings.
Four: The stone products with a specific radioactivity greater than the Class C control value can only be used for other purposes such as seawalls, bridge piers, and steles.
sample name
radium
thorium
Potassium
category
Pearl flower
27.5
82.2
1326.0
Class A
Wan Shanhong
28.0
27.7
1018.0
Class A
Malachite Green
27.5
48.7
1275.2
Class A
Indian Red
218.9
280.1
1238.0
Class C
Wu Yihong
247.6
247.6
1316.3
Class B
Guilin Red
241.2
246.9
1549.2
Class C
Luo Yuanhong
80.8
96.4
1446.0
Class A
Shi Daohong
85.6
182.0
1444.0
Class B
Maple red
107.8
108.6
1260.3
Class B
General Red
11.4
40.1
1473.0
Class A
Du Fuhong
470.8
910.4
3054.7
More than Class C
Tai Shanhong
90
83.2
1104
Class A
Lu Jinhua
119.5
157.2
1282
Class B
Cherry red
104.7
104.5
1205.8
Class B
Chrysanthemum
12.5
29.2
1455
Class A
Maran Red
102.7
189.5
1196
Class B
South African red
49.8
142.6
1328
Class B
Sambo Red
71.8
128
1545
Class B
Jinan Qing
5.5
4.3
131.1
Class A
Wendeng White
40.6
21.1
978
Class A
Five Lotus
145.5
315.0
1309
Class B
Rose red
143.2
182.5
1310
Class B
Taishan Red
109.1
173.8
1338
Class B
Du Fu Green
483.5
792.6
3313
More than Class C
Xi Lihong
92.3
105.6
1362
Class A
芩溪红
96.4
109.5
1273
Class B
Chuanhong
119
184
1395
Class B
Hui Donghong
138.5
175
1468
Class B
Shan Xiahong
57.5
208
1400
Class B
Tiger shell
71.0
104
1608
Class B
Lilac purple
116
110
1619
Class B
Pink Hill
147.5
170.8
1520
Class B
Li Hong Hong
132.8
91.3
1191
Class B
Decoration home
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