In recent years, imported stone has quietly occupied the domestic market. In 2003, the total weight of imported stone in China was 1.883 million tons, and the value of imported goods reached 290 million U.S. dollars. Due to advanced foreign mining techniques and processing methods, imported stone has an advantage in quality, and then With numerous varieties and colors, imported stone is more competitive in the domestic market. However, it is easy for people to overlook the radioactive level of imported stone.
From the test results, the imported stone with high radionuclide levels is South Africa Red, Indian Red, Phenophthalmus, Royal Vine, etc., among which the small brown beads (IRa is 1.02, Ir is 3.15), and the brown bead (IRa is 1.48, Ir is 3.43), South African Red (IRa is 1.13, Ir is 3.63) has more than Class C radioactivity. According to the provisions of GB6566-2001, this kind of stone can only be used for monuments, seawalls, piers and other humans. Less place to get involved. However, some consumers have neglected the detection of the radioactivity of these imported stones because of blind pursuit of decorative effects, making these stones have long-term or even permanent effects on humans and the environment without being noticed.
Consumers have the right to request manufacturers to produce inspection reports when purchasing stone materials, and they should pay attention to the date of the inspection report. Stones of the same type have great differences in their radioactivity due to their different mining sites, mineral deposits, and origins, such as: Gray Point Mahuagang After several tests of stone, the external exposure index ranged from 0.49 to 0.98. Anxi red granite was repeatedly tested and the external exposure index ranged from 0.57 to 0.91. The difference was more than doubled. There were even some stones with higher radioactivity. Multiple measurements, the radioactivity can be from Class A to Class B or even more than Class C, such as Shidaohong granite, external exposure index range 0.55 ~ 1.33, Indian red granite, external exposure index range 0.46 ~ 1.93, royal brown Granite, external exposure index range of 0.29 ~ 3.50 and so on. Therefore, when selecting or using stone, one cannot only look at one inspection report. In particular, when it is used in large quantities in engineering, it should be tested in batches or in stages.
Although there are some problems with the radioactivity of stone materials, consumers do not have to “change their colors†and reject all stone materials. It is not difficult to see that the stones with high radioactive levels are mostly red series, brown series granite, and natural marble. And some other color granite is safe to use.
For the finished finished decorative marble, its quality can be identified from four aspects:
One view is to visually observe the surface structure of marble. In general, a uniform fine-structured marble has a delicate texture and is a marble product; coarse and unequal-sized marbles have poor appearance. In addition, due to the geological effects of marble often produce a number of subtle cracks in it, the stone is most likely to rupture along these sites, should be removed. The lack of edges and corners is even more aesthetically pleasing, especially when choosing.
Four test quantities, that is, the amount of marble size specifications, so as not to affect the splicing, or cause the spliced ​​pattern, pattern, line deformation, affect the decorative effect.
Listen to the three, that is, the percussion sound of marble. In general, the knocking sound of good quality marble is crisp and sweet; on the contrary, if there is a slight crack inside the marble or the particles become loose due to weathering, the knocking sound is rough and dumb.
Four tests, that is, using a simple test method to check the quality of marble. Usually, a small amount of ink is dripped on the back of the marble. If the ink quickly spreads out and leaches out, it means that the internal particles of the marble are loose or there are gaps. The quality of the marble is not good. On the contrary, if the ink drops are not moving, it means that the marble texture is good.
Marble decoration
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Interior decoration coatings can be divided into interior wall coatings and wood coatings. Interior wall coatings are divided into synthetic resin emulsion interior wall coatings and waterborne interior wall coatings. Synthetic resin emulsion interior wall coating is a synthetic resin emulsion based material, and pigments, fillers, grinding and dispersing after adding various additives formulated coating (commonly known as latex paint). This type of paint has a bright color, a variety of colors, good adhesion with the grass roots, quick drying, scrub resistance, safe and low toxicity, easy construction, easy maintenance, etc...
The name of the marble is named after the original rich in Dali, Yunnan, China. Natural marble is a crystalline limestone with a hard material and can last for decades or even 100 years under normal conditions. Nowadays, marble is often used to make marble plates and to make decoration materials for buildings. What kind of marble is better? How to identify the quality of marble? Interested friends may wish to study together with Xiaobian!
Expert Weapon: How to buy stone
Fixed ceiling lamps Fixed ceiling lamps are often used in homes, offices, entertainment venues and other places. When purchasing, they should first consider the safety and quality of the lamps, and consider the size, height, and function of the room. . ■Go to large stores to purchase products that have the “Three Guarantees†commitment and purchase lamps that have the CCC certification mark. ■Watch three times when shopping. A look at the product logo is complete - the logo of regular products is often more standardized, should mark the trademark ...
What kind of decorative stone should be used should generally consider two factors.
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