Many citizens often hold this view when decorating new houses. "There are many rays in the marble, the darker the color, the more powerful." "The radioactivity of the decoration materials in the new "standard" is not limited"... However, experts pointed out that There are some misunderstandings about the understanding of the radioactivity of the decoration materials.
Misunderstanding 1: Deep color rays
Some people think that the deeper the color of the decoration stone, the stronger the radioactivity. In this regard, experts have said that this statement is not strict. Although in general, stone like white marble does rarely have radioactivity, the radioactivity of malachite green and granite is relatively more, but there is no necessary connection between color depth and radioactivity. For example, the radioactivity of most black stones does not exceed the standard. The true determination of its radioactivity should be the “birthplace†of the stone, which is the geological condition of its origin that determines its radioactivity.
Some people think that as long as the marble is radioactive, it will definitely exceed the standard. Experts pointed out that it is not. On the one hand, artificial marble is not artificially synthesized, so it generally does not contain radioactive elements. On the other hand, even natural marble is not the darker the color, the more it will exceed the standard. Last year, the city's environmental protection product quality supervision and inspection station tested over 10 kinds of stone such as marble and granite. As a result, all the marbles were qualified, but 40% of the granite exceeded the A-type upper limit (that is, it is not suitable for interior decoration materials).
Myth 2: The new "standard" regardless of radioactivity
In the "Shanghai Residential Decoration Acceptance Standards", it seems that there are no clear provisions for marble, granite, ceramic tiles, sanitary ware and other materials that may contain radioactive materials. However, according to the "Standard" drafting team leader and deputy director of the Shanghai Institute of Building Research, Lou Minggang, the "Basic Principles" of the first part of the Standards clearly stipulates that "residential decoration and decoration should comply with laws, regulations and related “Provisionsâ€, “The quality of the purchased decorative materials shall comply with the quality requirements of the relevant standards of the productâ€. The national standard "Building Materials Radionuclide Limits GB6566-2001", which was implemented in 2002, is specific to the radioactive specific activity limits of natural radionuclides Ra-226, é’-232, and K-40 in building materials. Defined. That is to say, the materials used in decoration and decoration are also subject to the "standard" in terms of radioactivity.
Misunderstanding 3: First renovation and then detection
Cao Jian, director of the Municipal Interior Quality Supervision and Inspection Station, said that if citizens are worried that the materials used in the radioactivity will exceed the standard, they should pay attention to the procurement of materials, rather than waiting for the renovation or even the body to be inspected. Because radioactive hazards generally come from embedded ornaments such as stone, ceramic tiles, sanitary ware, etc., in the renovated house, due to other materials in the environment, it is impossible to measure a single data of a certain material. To make an accurate measurement, you have to knock a piece from the finished product and send it to the laboratory for testing. However, this method is obviously not feasible.
How to check from the source? The relevant person in charge of the Municipal Environmental Product Quality Supervision and Inspection Station said that three "chapters" should be identified. That is, before purchasing these materials, consumers should first ask the merchant to produce the test report of the batch of materials. There should be three “chapters†on the report, namely the circular inspection mechanism chapter, the elliptical CMA chapter and the CAL chapter, and the report. The conclusion that the batch of materials is “tested and qualified†should also be indicated. Fu Hui, deputy chief engineer of the building materials and component quality inspection station, pointed out that the materials used for home interior decoration must also be Class A materials, because only such materials are suitable for the interior of civil buildings, and businesses should also show them to consumers. Proof of Class A decoration materials.
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