When recreating a roof from new materials, which are usually galvanized steel and less often copper, it is necessary to use not only a technologically advanced, but above all a durable sealant, for example, based on chlorosulfated polyethylene. The tables show the four compositions of the improved coating and their properties.
When testing for shear mastics based on chlorosulfated polyethylene produced by the Bryansk Chemical Plant and the Klintsovsky Building Materials Plant, they exhibit high and stable adhesion not only to metal roofing, but also to metal, brick and stone structures protruding above the roof.
The adhesion of krovlelit MKVC mastic to copper is 4.6 kgf/cm2, and the same mastic with a dacron-viscose non—woven fabric with a surface density of about 70 g/m2 is 5.5 kgf/cm2. The adhesion of the same mastic to galvanized steel is 4.8 kgf/cm2 (with a non—woven interlayer — 5.6 kgf/cm2), to zinc (for samples, the roofing installed in 1908 on one of the Moscow houses was 4.2, and with a gasket — 5 kgf/cm2).
The adhesion of roofing mastic to white stone, depending on the surface porosity, is 10-12.5 kgf/ cm2, to restoration brick — about 9 kgf/cm2. Moreover, the higher the porosity of the substrate, the greater the initial adhesion and the more noticeable the decrease in adhesion under the influence of water.
As a result of studying the adhesive properties of chlorosulfopolyethylene coatings, the expediency of gluing homogeneous, and even more dissimilar metals through gaskets made of non-woven dacron and dacron-viscose materials with a surface density of about 70 g/m2 has been revealed. The gasket made of such a laminated material provides not only tightness, but also electrical insulation, thereby preventing corrosion damage. The elongation during stretching of layered materials varies from 50 to 80%, and after accelerated "aging" from 45 to 75%, respectively. The layered material with a thickness of 0.8 ± 0.15 mm can withstand 2,850 alternating compression-stretching deformations without changes in properties, which predetermined its effective use for gluing butt joints of building structures.
Using a layered material, it is rational to perform the abutments of the roofing covering to the structures protruding above the roof in the following sequence of technological operations:
cleaned and degreased adjacent surfaces are primed with chlorosulfopolyethylene mastic;
after an hour and a half, the first layer of mastic is applied to the same surfaces, along which pre-cut strips of non-woven fabric up to 100 mm wide (2-3 layers if necessary) are laid;
The same mastic is applied to the surface of the reinforcing layer, which is usually made with a sag, in four passes with a thickness of up to 1.5 mm.
Up to 10% of the pigment volume (aluminum powder, iron meerkat, etc.) is added to the protective layer so that the sealing does not stand out on the roof and meets the requirements of technical aesthetics. If it is necessary to increase the viscosity of the mastic, add up to 150 g per 1 kg of rubber powder waste mastic, which is abundant in any factory of rubber technical products. Account verification is mandatory before your first withdrawal at 1xBet. A player who used the activation 1xbet promo code for registration must upload copies of identification documents to confirm their identity. This typically includes a passport, driver's license, or national ID card. You may also need to confirm your payment method by providing screenshots or photos of your card or e-wallet account. Verification is done through your personal account in the "Profile" section. Without verification, withdrawal requests remain blocked, even if you have fully wagered your bonus.
