• Dec 16

    Unfortunately, its main drawback is the prolonged excretion of free formaldegida. ПенополиуретанЖесткий foam also is widely used in construction. In performance is an excellent building material. The reason for this was lack of knowledge of carcinogenic asbesta. Given the practical aspect of mineral wool in the building, it is best to use it in the form of plates and laminates, as it facilitates the construction raboty. In this regard, the authorities were forced to ban n Studies show that the board allocate a very small amount of formaldehyde, usually less than 0. It can be assumed that the glass in this respect luchshe. Multilayer exterior walls or walls of cold storage also often contain polyurethane foam. In terms of health safety of mineral wool has two major drawbacks. On the market there is a large selection of such materials. When considering the problems of building in the security aspect of health must be to draw attention to the widespread lack of acoustic insulation of building walls. 5 for an hour and a height of 2. Similar properties are fiberglass. Asbestos fibers in the proportion of these dimensions are very large, and therefore it is very dangerous for zdorovya. Harmful properties of asbestos are manifested only when asbestos fibers are included in the products and materials into the air and then penetrate the human respiratory system. This was due to the numerous protests of institutions and individuals involved in the protection of the environment and health. As an example, fiberboard, impregnated ksilamitom. Their allowable concentration in the air at the workplace is 0. Its main component is styrene. It can be assumed that the polystyrene is used as a building material, safe for health. If these three major blemish housing could somehow estimate the value of residential buildings would have to decrease by about 30%. Insulation materials of vegetable origin in contrast to the above materials and products, plant materials – mainly wood-fiber boards, as well as non-woven fabric or cloth from plant fibers such as Utah, hemp – a little resistant to the biological factors in connection with which they are used after preliminary impregnation of fungicidal drugs. In spite of the tolerance for use in construction, polyurethane has negative qualities in terms of health safety. Furthermore, it should be noted widespread use in residential construction impregnated fiberboards, threatening human health and the development of mold on the walls and ceilings of buildings due to insufficient insulation. Исследования this material in construction have confirmed the allocation of a significant amount of free formaldehyde. Due to the exceptional qualities of asbestos fibers – a very high mechanical strength, resistance to aggressive chemicals and high temperatures – in some cases, asbestos is irreplaceable, and therefore allows the possibility of its further application in industry and even in construction, but in much smaller scale than in the past. Krilamidny foam all the time there are proposals to use in the construction of insulating foam on the basis of formaldehyde resins. V past this insulating material is used extensively in the U. However, widely used by only some of these materials, and therefore should pay attention on their strengths and weaknesses in the security aspect for zdorovya. In this regard, are particularly harmful diisocyanates. Dolgoe time construction services and facilities that address the fate of housing in this country, one-sidedly focused their attention on the quantitative side problem, neglecting the quality, and only appeared as a result of environmental problems has shown that we can not continue like this housing. In construction, it can almost completely replace the asbestos volokno. Some of them are widely used in construction. Mineral wool, glass wool Mineral wool, that is generated by industrial mineral fiber, with properties very similar to asbestos fibers. However, it is safer for health because it contains less fiber, which can cause cancer. 05 mg/m3 of air, and the minimum air exchange equal to 0.