Using the continuous improvement of people's living standards, the usage of natural stone in ordinary people's homes isn't a fresh thing. For regular consumers, it's important to acquire some relevant knowledge to get the natural rock that is adequate.

(1) Material selection based on the standard:

The National Necessary Standard GB6566-2001 "Small Radionuclide Limits for Building Components" has been implemented since July 1, chitrust 2002. The typical radioactive components are classified into Class A, B, and C.

Consumers should pick the rock type that suits their needs according to their own needs. If it is an ordinary house decoration, it will choose the stone type that is radioactive for Course A. If it is used in anatomist, it should be appropriately selected relating to its radioactive classification.

(2) Use imported stone with caution

In recent years, imported natural stone has quietly occupied the home market. In 2003, the total weight of brought in rock in China was 1.83 million tons, and the worthiness of imported goods reached 290 million US dollars. Because of advanced international mining technology and processing methods, imported rock has an benefit in quality. Alongside the numerous types and shades of imported rock, imported stone can be more competitive in the local market.

However, what is overlooked is the radioactive degree of imported stone.

From the test results, the imported stone with high radionuclide levels are: South African red, Indian red, fine brown beads, royal corn, etc., among which small brown beads (IRa is 1.02, Ir is 3.15), fine brown beads (IRa) The radioactivity of 1 1.48, Ir is 3.43), Southern African crimson (IRa is 1.13, Ir is 3.63) has exceeded C. Based on the provisions of GB6566-2001, such rock can only be used for monuments, seawalls, piers and various other humans. A location rarely touched.

However, many customers have neglected the detection from the radioactivity of the imported stones because they pursue the decorative effect blindly, which makes these stones have long-term as well as permanent effects about humans and the environment without being discovered, so the brought in stone should be used with extreme care. .

(3) View inspection report

Consumers have the proper to ask the maker to create the inspection survey when purchasing the rock, and should pay attention to the date from the inspection statement. The stone from the same variety has great distinctions in radioactivity due to the difference of its ore stage, mineral layer and origin.

For example, the greyish spotted granite has been tested many times, and the exterior publicity index ranged from 0.49 to 0.98. The Anxi red granite was examined several times. The exterior exposure index ranged from 0.57 to 0.91, the difference was more than doubled, as well as some radioactivity was compared. Large rock, after repeated measurements, its radioactivity can be from Class A to Course B as well as Course C.

For example, Shidao Honggang granite, exterior exposure index selection of 0.55 ~ 1.33, Indian reddish granite, external exposure index range of 0.46 ~ 1.93, royal dark brown granite, external publicity index selection of 0.29 ~ 3.50, so consumers are in choice or When using rock, you can't find one inspection survey by one, particularly when it is found in large quantities in engineering, it ought to be tested in batches or in phases.

(4) Concentrate on stone radioactivity

Although there are some issues with stone radioactivity, consumers don't need to "talk about stone color change" and deny all of the stone. It isn't difficult to discover that the rock with high radioactivity level is mainly red series, dark brown series of granite, organic marble and Some various other color granites can still be used with confidence.