Cold-stirring cold-paving type epoxy modified asphalt material and preparation method thereof

Abstract

The invention discloses a cold-stirring cold-paving type epoxy modified asphalt material and a preparation method thereof. The cold-stirring cold-paving type epoxy modified asphalt material is composed of a main ingredient A and a curing agent B; the main ingredient A comprises the following components in parts by weight: 0-50 parts of epoxy resin, 40-90 parts of flexibilizer, 5-15 parts of reactive diluent, 10-40 parts of asphalt, 10-40 parts of active bulking agent and 0-5 parts of coupling reagent; the curing agent B comprises the following components in parts by weight: 0-100 parts of flexible curing agent, 0-100 parts of alicyclic amine curing agent and 0-10 parts of accelerant; and the ratio of the main ingredient A to the curing agent B is (1-5):1. The invention utilizes a self-assembly behavior of the active bulking agent on the surface of asphalt particles to solve the problem of compatibility between weak polar asphalt and strong polar epoxy resin. A flexible chain segment is introduced into an epoxy asphalt three-dimensional structure network by the flexibilizer and the flexible curing agent, so that the fatigue toughness of the epoxy asphalt material is greatly promoted and the secondary cracking phenomenon caused by insufficient toughness is effectively restrained.

Description

technical field [0001] The invention relates to a cold-mix and cold-pave epoxy-modified asphalt material, in particular to a cold-mix and cold-pave epoxy-modified asphalt material for steel bridge deck pavement maintenance and a preparation method thereof. Background technique [0002] Epoxy asphalt steel bridge deck pavement has the performance defect of "excessive strength and insufficient fatigue". Under the service conditions of heavy load, high temperature and rainy in China, the early construction of epoxy asphalt steel bridge deck pavement in China has successively suffered from pothole disease In the frequent period, it is urgent to use cementing materials with convenient construction, short maintenance period and good fatigue performance to repair the pits and grooves. [0003] If hot-mixed epoxy asphalt consistent with the original pavement is used to treat pit diseases, special heating equipment and small hot-mixing equipment are required, and the curing time at r...

AI Technical Summary

Problems solved by technology

Patent CN103215874B repairs potholes on epoxy asphalt steel bridge deck by mixing epoxy resin and cold-mix asphalt mixture, but the cold-mix asphalt mixture still needs to be pre-mixed at 40-80°C Patent CN104031396A and CN104031394A adopt toxic solvents such as a large amount of xylene, styrene, methyl methacrylate to realize the mixing of epoxy asphalt at normal temperature, which is not conducive to the health of operators and users; the cold-setting property described in patent CN103696366B Resin asphalt binder has poor toughness, its elongation at break > 10%, and the ultimate bending and tensile strain at -10°C low temperature > 600με, which is prone to fatigue cracks, resulting in secondary cracking

Combining the performance characteristics of hot-mixed epoxy asphalt, ChemCoSystems of the United States provides matching resin 047 for pothole repair. The actual application effect of this resin on Sutong Bridge, Edong Bridge and other bridges is not ideal. Secondary cracking occurs quickly and is expensive

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