Composite high-speed rail waterproof material

Abstract

The invention discloses a composite high-speed railway waterproof material, which comprises an ingredient A and an ingredient B, wherein the ingredient A is prepared from the following raw materials in parts by weight: 98 to 102 parts of polyether polyol, 2 to 9 parts of plasticisers, 10 to 20 parts of 4,4'-methylene-bis(phenyl isocyanatel), 4 to 28 parts of graphene / loprazolam solution and 6 to 48 parts of accessory ingredients; the ingredient B is prepared from the following raw materials in parts by weight: 53 to 63 parts of amine-terminated polyether D400, 16 to 20 parts of 4,4'-diamino-3,3'-dichlorodiphenylmethane, 4 to 14 parts of 1,3-cyclohexanebis(methylamine) and 5 to 9 parts of amine-terminated polyether T5000. The composite high-iron waterproof material provided by the invention has the advantages that the construction process is simple and stable; the cost is low; excellent mechanical performance, waterproof performance and weather-resistant performance are realized; the waterproof material can be applied to high-speed railway concrete protection.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a composite high-speed rail waterproof material. Background technique [0002] With the rapid development of the high-speed railway industry and the high-standard requirements for high-speed railways, there are more and more bridges and viaducts for high-speed railways. The high-speed rail bridge adopts the structural form of simply supported beams used in urban bridges, and the bridge is made of reinforced concrete. Therefore, the negative bending moment of reinforced concrete in the high-speed rail bridge and the concrete bridge deck are subject to high-speed vibration caused by repeated loads from trains. , tensile shear and huge impact, and after the shrinkage and expansion caused by temperature and humidity caused by the climate change of the external environment, the concrete bridge will produce some fine cracks, although these cracks cannot be reduced in a short period of...

AI Technical Summary

Problems solved by technology

Due to the existence of these cracks in use, rainwater or bridge water can easily enter the concrete, thereby aggravating the freeze-thaw damage of the concrete, especially in the northern region, the method of sprinkling salt and melting snow often used in winter will cause ice and salt water to enter the steel bars Corrosion of steel bars in the process reduces the load-bearing area of ​​the steel bars, which is equivalent to reducing the steel bar utilization rate of the bridge, and eventually damages the bridge

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