Epoxy mortar for bridge expansion joints and construction method thereof

Abstract

The invention relates to an epoxy mortar for bridge expansion joints and construction method thereof, and belongs to the technical field of building materials. The epoxy mortar material consists of a liquid A, a liquid B and a filler; and diamines D2000 and D230 are mixed as an epoxy curing agent. The curing agent has low viscosity, good compatibility with the epoxy resin, long working life, high bonding strength, good flexibility and thermal shock resistance, and can be applied to the epoxy mortar material capable of absorbing the stress. The epoxy mortar material mixed from the liquid A, liquid B and filler for construction of bridge expansion joints changes the condition that rigid concrete, which can to be easily damaged under impact stress, needs profile steel for protection in the traditional bridge expansion joint; epoxy mortar material substitutes the rigid concrete in traditional expansion joints, avoids a steel structure, and has good waterproof and seal performance; the expansion joints have color consistent with the color of the adjacent concrete or asphalt, so that the bridge is more beautiful; the expansion joints cannot cause vibration of vehicles when the vehicles pass by the expansion joints; and the noise generated by the vehicles is lower.

Description

technical field [0001] The invention relates to an epoxy mortar used for bridge expansion joints and a construction method, belonging to the technical field of building materials. Background technique [0002] Expansion joints are an important part of bridge engineering, and their construction technology is a very critical process in bridge construction and an important part that affects the quality of bridges. The quality of expansion joints will affect the overall connection of the bridge, and it will cause a lot of impact and jumping when the vehicle is running, leading to traffic safety accidents. [0003] At present, in the construction of bridge expansion joints, it is necessary to install pre-embedded reinforcement, use prefabricated steel parts and pre-embedded reinforcement for welding, and finally pour cement concrete in the grooves on both sides of the expansion joint. Its internal structural strength is low, affected by external temperature changes and concrete ...

AI Technical Summary

Problems solved by technology

[0019] The curing agent in this patent uses one or more of polyamide, aliphatic amine, ester cyclic amine, aromatic amine, phenalkamine and their modified products. The curing agent has the characteristics of high brittleness and easy cracking; its filler mainly It is black rubber particles and black rubber powder. Although the rubber has a certain degree of flexibility and can absorb impact stress to a certain extent, the filler has low hardness, is easy to age and is not wear-resistant; the potting material in this patent is directly poured into the original telescopic Seam installation, thus forming a seamless expansion joint structure

The seamless telescopic structure is completely elastic, too brittle and has poor impact resistance; after a long time of use, it will form a bump, which will cause inconvenience to passing vehicles

[0020] Furthermore, the average diameter of the whiskers in the filler is 1-8 μm, and the average length is 50-200 μm. Because the particles are too small, the mixed glue and rubber are not easy to bond, and local mixing is prone to unevenness.

Based on the above shortcomings, the performance of the material produced by this patent is not stable, the service life is short, and it needs to be improved and perfected in the actual use process

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