How to detect the radiation of marble and porcelain
Professor Hou said: any substance in nature contains natural radioactive elements, but different substances in the radioactive element content is different. In our environment, the soil, water and even the air are radioactive elements, non stone building materials such as cement, steel, brick, brick, and stone, like all contain radioactive elements. Take the brick, is made from clay and other materials, clay is formed by the weathering of rocks, clay and stone are the same as the natural form, if the radioactive elements in the clay is relatively high, that the burnt brick radioactive element content also will be high, because this stone is that only other materials do not contain radioactive, radioactive view is not correct. The Ministry of health has also issued a "standard for the protection of building materials," the construction of materials in the activities of natural radioactive elements have been limited to ensure the safety of use.
Stone, the previous period and "radioactive radiation" is often linked to so many people want to use stone as "radioactive stone" from stone has been used more often is on pins and needles, a reader called to ask where can detect radioactive stone? If the home shop stone how to do? Anxious shows between the lines. Stone radioactive in the end is how the same thing, can not rest assured that the use of the home, the reporter recently visited the China University of Geosciences (Beijing) Department of Applied Geophysics, associate professor Hou Shengli.
When a reporter asked what kind of material is suitable for use in the home, how to choose the time, Hou said: as early as 1993, the National Building Materials Bureau issued a "natural stone products radiation protection control standard" classification of natural stone, according to the radioactive level of the classification, natural stone will be divided into A, B, C three the product, a product can be used on any occasion, B products can be used in all buildings in the interior finishes outside the internal and external finishes and industrial facilities, class C standard can only be used as a building with stone. From our analysis of nearly 200 samples of the test results, the stone sample of 80% can be used in any case of a class stone. The radioactive contents are a part of the stone is very low, even lower than the radioactive content of cement floor, brick general, indoor use of this stone, can play a role in shielding, make indoor radiation reduced, has the function of environmental protection.
