Preparation and Performance Study on High Toughness Epoxy Resin Mixture for Rapid Repair of Bridge Expansion Joint Anchorage Zone
The service conditions of concrete in the anchorage zone of bridge expansion joints are harsh,and factors such as high-speed dense vehicle loads,jumping impacts,or settlement between roadbeds can easily cause damage to the anchorage zone of expansion joints.To solve the problem of difficulty and long repair cycle after anchor zone damage,a fast curing high toughness epoxy resin mixture was successfully developed using epoxy resin and high flexibility reactive diluent as base materials,where room temperature rapid curing agent,high-strength wear-resistant aggregate,and elastic particles were added.The performance of the mixture was systematically tested and evaluated.The test results based on the optimal mix ratio show that the gel time of the mixture is controlled within 15 min～40 min,the compressive strength of the mixture reaches 42.4 MPa in 2 h,and the compressive strength of the mixture exceeds 50 MPa in 1d,which shows its high performance and impact resistance as a rapid repair material for bridge expansion joints.
万方数据
维普
