Using the continuous improvement of people's living standards, the use of natural stone in ordinary people's homes isn't a new thing. For regular consumers, chitrust 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 Mandatory Standard GB6566-2001 "Small Radionuclide Limits for Building Materials" has been implemented since July 1, 2002. The typical radioactive components are classified into Class A, B, and C.

Consumers should pick the stone type that fits their needs according to their own needs. If it's an ordinary home decoration, it should choose the rock type that is radioactive for Course A. If it's used in executive, it ought to be appropriately selected regarding to its radioactive classification.

(2) Use brought in rock with caution

Lately, imported stone has quietly occupied the home market. In 2003, the total weight of brought in stone in China was 1.83 million tons, and the value of imported goods reached 290 million US dollars. Because of advanced foreign mining technology and processing methods, imported rock has an benefit in quality. Together with the numerous types and colours of imported stone, imported stone can be more competitive in the home market.

However, what's overlooked is the radioactive level 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 little dark brown beads (IRa is definitely 1.02, Ir is 3.15), okay brown beads (IRa) The radioactivity of just one 1.48, Ir is 3.43), Southern African red (IRa is 1.13, Ir is 3.63) has exceeded C. Based on the provisions of GB6566-2001, such stone can only be used for monuments, seawalls, piers and various other humans. A location rarely touched.

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

(3) Look at inspection report

Consumers have the proper to ask the manufacturer to create the inspection statement when purchasing the stone, and should pay attention to the date of the inspection statement. The stone of the same range has great distinctions in radioactivity because of the difference of its ore point, mineral layer and origin.

For example, the greyish spotted granite has been tested often, and the external publicity index ranged from 0.49 to 0.98. The Anxi reddish colored granite was tested several times. The external exposure index ranged from 0.57 to 0.91, the difference was more than doubled, and even some radioactivity was compared. Great rock, after repeated measurements, its radioactivity could be from Class A to Class B as well as Class C.

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

(4) Focus on stone radioactivity

Although there are some problems with stone radioactivity, consumers do not have to "talk about stone color change" and deny all of the stone. It isn't difficult to find the fact that rock with high radioactivity level is mostly red series, brownish series of granite, natural marble and Some additional color granites can be used with self-confidence.