Abstract
To evaluate the effectiveness of asphalt–concrete powder modifiers (PMs) prepared via high-temperature shear-induced grinding of waste tire rubber or its cogrinding with thermoplastic elastomers and employed according to the Russian dry process, regulatory requirements to the model binder were specified. The process of evaluation of the optimal concentration of PMs in model binder (MB), which improves the rheological characteristics in the entire temperature range in service of road pavement, is shown. It is determined that fatigue tests of MBs are decisive in the determination of optimal concentration of PMs. A decrease in the concentration of PM below optimal could worsen the stability of MB to the formation of fatigue cracks as compared to initial bitumen. The suggested set of tests can be recommended for the choice of the composition and evaluation of the quality of rubber–bitumen and polymer–bitumen binders.
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Thos work was supported by a subsidy allocated to the Federal Research Center of Chemical Physics of the Russian Academy of Sciences in the framework of a state assignment.
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Translated by A. Muravev
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Berlin, A.A., Nikol’skii, V.G., Krasotkina, I.A. et al. Rubber and Rubber–Polymer Modifiers of Asphalt–Concrete Mixes Prepared by High-Temperature Shear-Induced Grinding. Part 3. Evaluation of Effectiveness of Modification. Polym. Sci. Ser. D 15, 71–78 (2022). https://doi.org/10.1134/S199542122201004X
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DOI: https://doi.org/10.1134/S199542122201004X