How do you do the marble radiation

Marble, the term has been in the previous period and the "radioactive radiation" associated with so many consumers want to use the marble as "marble radioactive" discourage people who have used the marble is on pins and needles, people often call Marble Panels asked where the radioactivity can be detected? If the home is paved marble how to do? The meaning of anxiety and loneliness. marble in the end is how the radioactive matter, can safely use at home? For a range of issues, China University of Geosciences Department of Applied Geophysics, Associate Professor Sheng-Li Hou made a reply.
Have only harm the Marble Slab more than the standard
Hou analysis is that the nature of any substance contains natural radioactive elements, radioactive elements in different materials but different contents. Around us in the soil, water and even air are radioactive elements, non-marble of the building and furnishing materials such as cement, steel, brick, whole body, like brick and marble contain other radioactive elements. Take the whole body tiles, is fired by the addition of other materials made of clay, clay is formed by the weathering of rocks, clay and marble were all naturally occurring, radioactive elements if the clay is relatively high, that the whole body by firing bricks radioactive element content will be high accordingly, so that only the marble only radioactive, and other radioactive material does not contain the view is not correct. Period of time before the Ministry of Health issued a "health protection standards for construction materials" on the building materials in the activity of natural radioactive elements were restrictions to ensure safe use.
80% of the marble can rest assured that for indoor use
So what kind of marble suitable for use at home, Marble Tile, how to choose? Hou said that as early as 1993, the National Building Materials Bureau issued a "Classification of natural marble products Radiological Protection Control Standards", of natural marble based on the level of radioactivity have been classified in the natural marble is divided into A, B, C three types of products, A class of products can be used in any occasion, B products can be used in addition to the room outside the interior surface of the internal and external finishes of all buildings and industrial facilities, C class can only be used as a standard marble finishes outside the building. From our nearly 200 samples of test and analysis results, 80% of the marble samples are used in any situation can be class A marble. There are still some of them were very low radioactive marble, even more than normal cement floor, brick radioactive content was also low, in the indoor use of this marble, can play a shielding effect, reducing indoor radiation, with environmental protection. Because some people lack the knowledge of radioactive, one-sided understanding of the formation of some, such as light-colored marble is now suggested that the low radiation than dark marble, in fact, this is not absolute, and many dark marble (such as red) of the radioactivity level is not high A class at the required standards, is lower than some light-colored marble, which we did the test can be proved.
How to detect whether excessive indoor radioactivity
How to detect whether excessive indoor materials, which is many people's concern. According to Hou introduction, conventional testing methods is room Neijia Ma spectroscopy analysis and radiochemical analysis, ground samples to test, sample letters, analysis period of 20 days or so, long period of relatively high costs. In view of this situation, quality monitoring in the National marble Centre's support, China University of Geosciences (Beijing), Department of Applied Geophysics, China marble Material Industry Association and developed the first marble of radiation detectors and their associated measurement techniques, to obtain Beijing Quality and Technical Supervision issued the certificate. This portable device which can be brought to the scene to test, no damage to finished products, finished products can be placed directly on the test, the test range of up to 50 × 50 cm, and the test time is short, usually takes about 10 minutes can be measured.
Finally, Hou said that the home environment as a whole, as long as the environment of radioactive indicators have reached the standard, not harmful to human impact. Therefore, we must address the "marble of radiation," this issue, do not fear a certain kind of radioactive material exceeding the blind removal, waste and unnecessary trouble.