Application in Beijing-Shanghai High-speed Railway:
The Beijing-Shanghai High-speed Railway, which has just been completed and opened to traffic, has a total length of 1,318km and a total investment of approximately 220.9 billion yuan. All Beijing-Shanghai high-speed railway bridge deck waterproof materials use spray polyurea waterproof coating, with a waterproof area of ??about 10 million, and the amount of spray polyurea used is about 20,000 tons. The Beijing-Shanghai high-speed railway bridge deck spray polyurea waterproofing system consists of the bridge deck base layer, primer, spray polyurea waterproof layer, and aliphatic polyurethane topcoat (exposed parts). The spraying equipment mainly uses GRACO's H-XP3 polyurea spraying equipment, which has a heating capacity of >75°C and a maximum pressure of 3500psi (24.13MPa). Construction auxiliary equipment includes: generators, air compressors, refrigerated oil-water separators, thermal insulation construction vehicles, etc. The application of spray polyurea waterproof coating in the Beijing-Shanghai high-speed railway has received widespread attention, which has played a positive role in promoting the vigorous development and application of spray polyurea coating technology.
Application in bridges:
Because polyurea elastomer technology can quickly form a film, it has good integrity, no joints, easy construction, and the adhesion to concrete can reach 2.5 MPa or above, the adhesion to steel can reach above 5MPa, and the polyurea material has excellent chemical resistance after film formation, which can effectively prevent the erosion of various corrosive gases and liquids, and protect the structure from corrosion damage; polyurea materials Under alternating hot and cold working conditions, the physical and chemical properties remain stable without significant degradation. Therefore, it has also been widely used in the construction process of bridges. Based on many years of experience in using high-quality polyurea products, relevant people believe that using polyurea elastomer technology as an anti-corrosion overall surface layer has good integrity, high strength and significant corrosion resistance, especially when combined with other anti-corrosion materials. Use it to extend the service life of the bridge.
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