The reduction in size during the first 14 days, takes place relatively quickly, then more and more slowing down and approaching the limiting value, with special design measures. If the individual cases it is desirable to have lower levels of additional shrinkage, then the board must before use, respectively, stored for. The ratio of foam to chemical environments has expanded polystyrene high resistance to various substances, including sea water, salt solutions, anhydride, alkalis, dilute and weak acids, soaps, salts, fertilizers, bitumen, silicone oils, alcohols, adhesives, water-soluble paint. Inert with respect to the inorganic building materials – concrete, lime, cement, gypsum, sand, etc., but partially decomposed by organic solvents, resins, bitumen solutions. Relating to chemical environments and biological attack proves that the expanded polystyrene (foam) is suitable for all kinds of activities, both at the enterprise and home use (in cottages and plots). Biological properties of polystyrene Expanded polystyrene can not serve as a breeding ground for microorganisms.
He's not moldy, not rot and does not decompose. Only in special cases, such as very dirty styrofoam, it can develop microorganisms. At the same time serves as a substrate EPS without taking absolutely no part in the biological process. Durability polystyrene expanded polystyrene slabs (essentially being plastic) resistant to aging and when used correctly maintains stable properties of the shape and size for a long time – that is, is a durable material. Today, there is evidence of field observations and expert opinion who argue that the material incorporated in the design about 30 years ago, has not undergone irreversible changes (size of plates, for example, due to shrinkage or contraction, etc.). It should be noted that the technology of production Styrofoam firms BASF, developed over 50 years ago in 1950, so age and full-scale tests is not great, as the technology itself. However, in the laboratory NIISF Moscow had conducted research on the durability and the necessary polystyrene test to analyze the characteristic cyclical changes in the outside air temperature annual cycle for the climatic conditions of Central Russia. In the climate chamber was modeled temperature-humidity effects on parts of structures, in which there is polystyrene.
A total of 80 cycles of tests of samples of expanded polystyrene plates. The following conclusions, which polystyrene boards have successfully passed the cyclic tests on temperature and humidity exposure, 80 cycles, which can be interpreted as corresponding to the number of years of use in conventional multi-frame structures with an amplitude of 40 C temperature effects. Lightness, ease of installation of expanded polystyrene boards are easily machined, using the most simple and popular tools, they can be cut into pieces of any shape and size. The economic effect Reduced cost of materials. Polystyrene plate – one of the insulating materials that is competitively priced. For example. Cost of 1 m 2 of living area where expanded polystyrene is used less than 15% -20% in comparison with other insulation materials. Reduced installation time and construction in general – boards lungs, not present difficulties in the work, do not require special equipment, do not pollute the environment. Saving of fuel will reduce emissions of CO2, which would reduce Russia's contribution to the development of the "greenhouse effect ". Reduced heating costs (up to 50%) due to low thermal conductivity as a result of ravnoplotnosti material in bulk.