Flame-retardant and antibacterial polyurethane waterproof coating for high-speed rail

Abstract

The invention discloses antiflaming antibacterial polyurethane waterproof coating used for a high-speed rail. The antiflaming antibacterial polyurethane waterproof coating used for the high-speed rail is prepared from the following raw materials in parts by weight: 48-52 parts of polyether polyol, 12-18 parts of 1,6-hexamethylene diisocyanate, 0.4-0.8 part of dioctyl adipate, 12-18 parts of xylene, 12-18 parts of chlorinated polyethylene, 1-10 parts of silica powder, 5-15 parts of talcum powder, 4-9 parts of 1,1,1-trimethylolpropane, 0.3-0.6 part of stannous octoate, 2-8 parts of inorganic antibacterial agent and 1-5 parts of fire retardant. The antiflaming antibacterial polyurethane waterproof coating used for the high-speed rail has the advantages of simple and stable construction technology, low cost and excellent mechanical property, waterproofness, fire resistance and antibacterial property, and can be applied to the concrete protection of the high-speed rail.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a flame-retardant and antibacterial polyurethane waterproof coating for high-speed rail. 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 crack...

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

Images