Epoxy asphalt additive for road and bridge pavement as well as preparation method and use method of epoxy asphalt additive

Abstract

The invention belongs to the technical field of road and bridge materials, and relates to an epoxy asphalt additive for road and bridge pavement as well as a preparation method and a use method thereof. The technical key points are as follows: the water-damage-resistant asphalt mixture comprises the following components in parts by weight: 40-60 parts of solid epoxy resin, 5-20 parts of a water-damage-resistant improver, 5-10 parts of an ultra-high molecular weight epoxy flexibilizer, 30-45 parts of a latent polyester curing agent, 50-100 parts of hard asphalt particles, 0.1-0.5 part of a curing accelerator, 0.3-1 part of a lubricating separant and 0.5-2 parts of an antioxidant. The epoxy asphalt additive is prepared under the condition of 110 to 140 DEG C. The softening points of the main raw materials such as the resin component, the curing agent, the hard asphalt particles and the like in the epoxy asphalt additive are controlled within the range of 90-130 DEG C, and the epoxy asphalt additive for road and bridge pavement is prepared by adopting a 110-140 DEG C melt extrusion process. And then directly putting the mixture into a mixing cylinder of an asphalt mixing plant to prepare the high-performance epoxy asphalt concrete with high-temperature rut resistance, low-temperature crack resistance and medium-temperature fatigue resistance.

Description

technical field [0001] The invention belongs to the technical field of road and bridge paving materials, and in particular relates to an epoxy asphalt additive for road and bridge paving, a preparation method and a use method thereof. Background technique [0002] Rutting-like diseases are prone to occur on asphalt roads and bridges with low-speed, heavy-load, and channelized traffic sections such as long longitudinal slopes, intersections, and truck lanes. In order to increase the resistance of the asphalt mixture to high temperature deformation, the addition of thermoplastic polyolefin plastics is often used to enhance and modify the asphalt mixture. However, the reinforcement effect is not good, mainly due to the following three aspects: firstly, thermoplastic polyolefin plastics still cannot change the thermoplastic nature of asphalt, it will still slowly deform under repeated action of high temperature and heavy load, and gradually accumulate into rutting diseases; seco...

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Problems solved by technology

However, the reinforcement effect is not good, mainly due to the following three aspects: first, thermoplastic polyolefin plastics still cannot change the thermoplastic nature of asphalt, and it will still deform slowly under the repeated action of high temperature and heavy load, and gradually accumulate into rutting disease; secondly, The thermoplastic polyolefin elastomer has poor compatibility with the asphalt phase, even if it is in the form of a direct mixing tank, there will be different degrees of segregation between the thermoplastic polyolefin elastomer and the asphalt, thus affecting the performance stability of the asphalt mixture. In addition, asphalt concrete based on thermoplastic polyolefin plastic modification has the problem of insufficient low-temperature crack resistance, that is, while improving the high-temperature anti-rutting performance of asphalt mixture, it often damages its low-temperature crack resistance. It also greatly limits the improvement of the high-temperature anti-rutting performance of asphalt mixture, and cannot be applied to the actual use requirements of asphalt pavement in severe winter regions and winter cold regions.

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