Low-temperature rapidly cured acrylic ester modified epoxy resin joint sealant used in road and bridge

Abstract

The invention discloses a low-temperature rapidly cured acrylic ester modified epoxy resin joint sealant used in roads and bridges. The joint sealant comprises a component A and a component B, wherein the component A comprises 55 parts of bisphenol F diglycidyl ether, 10-12 parts of graft polymerized epoxy resin and acrylic copolymer and 33-60 parts of an acrylic monomer; the component B comprises 5-15 parts of modified 1,3-cyclohexanediamine and 30-45 parts of modified hexamethylenediamine; the joint sealant is prepared by respectively stirring and mixing the component A and the component B, mixing the two components in the mass ratio of 100:(90-100), uniformly stirring, adding 1-5 parts by mass of an accelerant diacyl organic peroxide into the mixed liquid, and further stirring. The joint sealant disclosed by the invention is high in binding strength, has the characteristic of excellent aging resistance, low flexibility, low viscosity, high interface binding force, secondary fatigue cracking resistance and the like, and can be used in joint sealing construction all year around.

Description

technical field [0001] The invention relates to materials for preventive maintenance of resin asphalt and epoxy asphalt mixture pavement layers, and asphalt pavement rapid filling and repairing materials, in particular to a low-temperature rapid curing acrylate modified epoxy resin joint glue for road bridges. Background technique [0002] As thermosetting resin materials, resin asphalt RA and epoxy asphalt EA have strong anti-rutting and anti-fatigue damage capabilities. It was reported that epoxy resin modified asphalt was synthesized and put into engineering application. Since the first introduction of epoxy asphalt pavement technology in Nanjing Second Bridge in 2001, by the end of 2013, the total area of ​​domestic epoxy asphalt pavement has reached more than 1 million m2. However, due to the high-temperature and heavy-duty use environment in China and the overall low construction level of steel bridge deck pavement in China, domestic epoxy asphalt pavement often begin...

AI Technical Summary

Problems solved by technology

Chinese patent CN10192146A provides a crack repair agent, including two mixtures of A and B, the A mixture includes epoxy resin, toughening agent, epoxy reactive diluent, and the B mixture includes modified amine curing agent, accelerator and organic silicon Oxyalkylene coupling agent, although its overall performance is superior to traditional asphalt joint filling materials, but it has defects such as high brittleness, poor toughness, water resistance, and acid resistance.

The resin has the advantages of high bonding strength, good toughness, low viscosity, good wettability, and curing at room temperature. However, even at room temperature, the curing time is as long as 3-5 hours. The curing time will be extended, which will seriously affect the construction efficiency. If the traffic is closed for a long time, it will affect the normal traffic of the bridge, and in severe cases, it will affect the traffic safety.

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