The special (high-strength) polyurethane waterproof coating for high-speed rail belongs to a two-component chemical reaction-type waterproof coating.
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High-Strength Polyurethane Waterproof Coating For High-Speed Rail
The special (high-strength) polyurethane waterproof coating for high-speed rail belongs to a two-component chemical reaction-type waterproof coating. Among them, Component A is an isocyanate-terminated prepomer obtained by polyether and isocyanate polycondensation, and component B is a colored liquid composed of enhancers, plasticizers, thickeners, and coagulants. Liquid.When used, mix the two components A and B evenly in proportion, brush on the waterproof base layer, and cross-link and cure at constant temperature to form a high-strength and extended rubber strong elastic coating film.
Product features:
◎ This product is a two-component chemical reaction-cured waterproof material and an environmentally friendly product. The strength of the product can reach more than 6.0MPa, the extension can reach more than 450%, and the low temperature can reach below -35℃. After the product is cured, a seamless and complete elastic waterproof layer is formed, which improves the waterproof and impermeable resistance of construction projects, especially with high strength and extensibility, and strong adaptability to base cracking or expansion.
◎ The product is easy to construct: during construction, only the A and B components need to be mixed proportionally, brushed or sprayed on the waterproof base layer, which is a kind of cold construction waterproof coating.
◎ Easy maintenance, only partial repair of the damaged parts can achieve the original waterproof effect, saving time, effort and low cost.
◎ The color is adjustable to meet your color needs.
Construction process:
◎ The base layer requires firmness, flatness, no debris, and sufficient drying. The yin and yang angles should be made into an arc shape, with the diameter of the yin angle greater than 50mm and the diameter of the yang angle greater than 10mm.
◎ Ingredients and dosage: According to the construction dosage, mix the A and B components proportionally, stir and use evenly.The reference dosage is 1mm thick, and the dosage of the coating film is about 1.3-1.5kg/m2.
◎ Large-area waterproof construction: The mixed coating is evenly coated or sprayed with rubber or plastic scrapers, and the thickness is required to be consistent, generally 1.5mm-2.0mm. It should be brushed or sprayed 3-4 times. The next brushing should be after the previous brushing is cured into a film, and it is brushed or sprayed in a vertical direction. It is generally a separate film, and the underground engineering floor should be covered with an additional layer of carcass reinforcing material.
◎ Coating thickness: Subway projects are 1.5mm-2.0mm, underground projects are 1.2mm-2.0mm, generally should be 1.5mm, toilets and baths should not be less than 1.5mm, exposed roofing projects use multiple waterproofing, each thickness is not less than 1.2mm, when the waterproof level is III, the roof is fortified, the waterproof thickness is not less than 2mm.When the carcass reinforcing material is added between the coatings, the thickness of the coating under the carcass is not less than 1.0mm, and the coating above is not less than 0.5mm.
◎ Protective layer: The surface of the coated waterproof layer should be isolated and protected according to the design requirements.
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