Abstract
The anion rubber modified asphalt (ARMA) mixture was first successfully developed with a unique process. In the development process, rubber and asphalt were mixed in the same proportion. Furthermore, the microstructure and modification mechanism of the material were characterized by SEM, FT‐IR, TG, and XRD tests. The mechanical property of the mixture was also tested in accordance with the relevant standards. In the end, the material’s capacity of releasing anion was measured by DLY‐6A232 atmospheric ion gauge. The results indicated that the addition of anion additive into the rubber modified asphalt (RMA) was a mere physical mixture, and the anion additives and rubber particles uniformly dispersed in the ARMA. The addition of anion additive could improve the thermal stability of the RMA. Compared with the traditional asphalt pavement material, the ARMA material shows excellent mechanical properties as well as the ability of releasing anion. Moreover, the material has enormous economic and social benefits by taking full advantage of a large amount of waste tires, thus improving the road surrounding environment.
Highlights
With the rapid development of the Chinese auto industry and the continuous improvement of people’s living quality, car ownership is increasing, which results in the problem of dealing with many waste tires
In accordance with the industry standard Asphalt Rubber for Highway Engineering, the evaluation on the test result of the technical index about the regular performance of the anion rubber modified asphalt (ARMA) was carried out since there are no national standards for the evaluation of the rubber modified asphalt (RMA) [14]
Intermolecular forces exist between rubber and asphalt as well as between anion additive and RMA; no novel chemical changes happened, and no new substances or groups have been generated
Summary
With the rapid development of the Chinese auto industry and the continuous improvement of people’s living quality, car ownership is increasing, which results in the problem of dealing with many waste tires. The number of the waste tires is 2.8451 million tons in 2012, and it will reach 3.2007 million tons in 2013. Such a large number of waste tires bring about heavy social and environmental burden. The recycling of waste tires is, extremely urgent. The major methods in dealing, with the waste tires include stacking (or tamping), burning and recycling. The application of crumb rubber in road construction, which is regarded as a better choice for handling a large amount of waste tires, has become a research and application emphasis globally [1, 2]
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