A kind of recycled rubber asphalt mixture and preparation method thereof

Abstract

The invention discloses a method for preparing a regenerated rubber asphalt mixture, which belongs to the field of asphalt technology. The main points of the technical solution include the following steps: S1: weighing 10-30 parts of rubber oil and 60-80 parts of rubber powder in parts by weight, Add rubber powder into rubber oil and swell for more than 6 hours at a temperature of 20°C-40°C to obtain a mixture; S2: add 60-80 parts by weight of new aggregates in the container for mixing, and then mix the Add the mixture, then add 20-40 parts of pavement reclaimed material in parts by weight, 4-10 parts of matrix rock asphalt, 1.7-2.8 parts of 70# asphalt, and 6-12 parts of filler to obtain the recycled rubber asphalt mixture, so as to improve the regeneration of the recycled asphalt mixture. The effect of low temperature resistance performance.

Description

technical field [0001] The invention relates to the technical field of asphalt, in particular to a recycled rubber asphalt mixture and a preparation method thereof. Background technique [0002] At present, our country attaches great importance to saving resources and protecting the environment. Public transportation is a resource-occupied and energy-consuming industry, and it is a large energy resource consumer in my country. Highway construction needs to consume a large amount of road construction materials, and road oxidation will also produce a large amount of waste pavement materials. Applying the recycling of waste pavement materials to road infrastructure construction and oxidation can turn waste into treasure, which can avoid land occupation and Environmental pollution can reduce the demand for stone and asphalt, and reduce road maintenance costs. [0003] The existing regenerated asphalt mixture is mainly to add rejuvenating agent to the regenerated asphalt mixtur...

AI Technical Summary

Problems solved by technology

[0003] The existing regenerated asphalt mixture is mainly to add rejuvenating agent to the regenerated asphalt mixture. The rejuvenating agent is generally extracted oil, rubber oil and the like to restore the performance of old asphalt, and the amount of rubber oil added is mainly based on the old The content of asphalt in the asphalt waste is determined, and the content of asphalt in the old asphalt waste itself is relatively small, so that the amount of rubber oil added is also very small, making it difficult for the rubber oil to fully disperse into the old asphalt waste in the actual production process As a result, the low temperature resistance of the recycled asphalt mixture is relatively poor, and when the amount of rubber oil added increases, the low temperature resistance of the recycled asphalt mixture increases, but the high temperature resistance of the recycled asphalt mixture decreases, which makes the recycled asphalt mixture Rutting resistance of asphalt is also reduced