Bitumen emulsion effect on properties of asphalt-concrete mix for non-rigid road pavements (Tambov) .

During major repairs of non-rigid road surfaces and reconstruction of automobile roads, it is necessary to remove old coating with road cutters. During cold milling of the old coating, the material acquires the form of granules with the surface covered with a bitumen film. Over time, the bitumen film loses its properties, and to reuse the material, it is necessary to restore the binder properties. The introduction of the bitumen emulsion in the composition of asphalt-concrete mix, allows to restore the binder properties affecting not only strength properties of the asphalt-concrete mix, but also deformability and stiffness of the mixture layer under the compressive load.

Purpose: Evaluation of the influence of the binder content on deformability and stiffness of the asphalt-concrete mix.

Methodology: Asphalt granulate fractions are used in proportions 8 to 16 and 18 to 36 mm with a residual bitumen content of 2%. The bitumen emulsion EBK-2 is used as a binder. The ultimate strength of the asphalt layer is measured according to GOST 12801. Deformation of the mixture layer is measured on a TP-1-1500 hydraulic press.

Research findings: The bitumen emulsion effect is shown for deformation and stiffness of the asphalt-concrete mix for the pavement construction.

Value: It is shown that the bitumen emulsion in regeneration of asphalt granulate affects deformability and stiffness of the layer subjected to compaction load. The development of deformation and stiffness of the mixture layer under the load with different binder content, particles size, and layer thickness are established. Analytical dependences are suggested for deformation and stiffness of the loaded layer, its thickness during paving, and percentage of bitumen emulsion in the mixture.

1. Harhuta N.Ya. Theory of road pavement compaction. In: Compaction of earth bed and road covers. Trudy Soyuzdornii. Moscow, 1980. Pp. 64–71. (In Russian)

2. Permyakov V.B., Zaharenko A.V. Justification of contact pressures for compaction of asphalt concrete mixtures. Stroitel'nye i dorozhnye mashiny. 1989; (5): 12–13. (In Russian)

3. Permyakov V.B. Compaction efficiency of asphalt concrete mixtures in pavements. Stroitel'nye materialy. 2005; (10): 8–9. (In Russian)

4. Tsupikov S.G. (Ed.) Road Master's Handbook. Construction, operation and repair of motorways. Moscow: Infra-Inzhenenriya, 2009. 924 p. (In Russian)

5. Kalgin Yu.I., Strokin A.S., Tyukov E.B. Prospective technologies of construction and repair of road pavements using modified bitumen. Voronezh, 2014. 223 p. (In Russian)

6. Rudenskij A.V. Cold asphalt concrete. Possibilities to extend the season of construction and repair works. Novosti v dorozhnom dele. 2006; (1): 11–42. (In Russian)

7. Kalgin Yu.I. Road bituminous-mineral materials based on modified bitumen. Voronezh, 2006. 272 p. (In Russian)

8. Zubkov A.F., Andrianov K.A., Antonov A.I., Odnol'ko V.G. Construction and repair of nonrigid road pavements taking into account temperature regimes of asphalt concrete mix. Tambov, 2017. 316 p. (In Russian)

9. Senibabnov S.A., Arhelov I.S., Zubkov A.F., Andrianov K.A., Makarov A.M. “Calculation of stresses in the roller and material contact zone”, RF Certificate of State Registration of Software N 2020611722. (In Russian)

10. Zubkov A.F., Andrianov K.A., Makarov A.M., Pileckij M.E. “Calculation of material deformation under dynamic loads”, RF Certificate of State Registration of Software. N 2017663676. (In Russian)

11. Pakhomova E.G., Zubkov A.F., Andrianov K.A., Monastyrev P.V. Influence of thickness and granulometric composition of granular asphalt on its strength characteristics when placing into the road pavement. Journal of Applied Engineering Science. 2020; 18 (2): 192–197. (In Russian)

12. Makaya L.M., Zubkov A.F., Andrianov K.A. Development of a mathematical model of pavement layer compaction processes. In: Proc. 8th Int. Symp. ‘Relevant Problems of Computer Simulation of Structures’, Tambov, 2023. Pp. 316–318. (In Russian)

13. Zarapina L.S., Andrianov K.A., Zubkov A.F. Influence of material properties obtained by cold milling of non-rigid pavements on layer deformation during pavement construction. Nauchnyj zhurnal stroitel'stva i arhitektury. 2022; 1 (65). 85–95. (In Russian)

14. Senibabnov S.A., Andrianov K.A., Zubkov A.F., Kuznecov A.A. Determination of rheological characteristics of asphalt granulate for pavements. Vestnik PGUAS: Stroitel'stvo, nauka i obrazovanie. 2021; 1 (12): 37–42. (In Russian)

15. Senibabnov S.A., Andrianov K.A., Zubkov A.F. Influence of asphalt granulate layer thickness on choice of roller parameters at reinforcement of motorway shoulders. Privolzhskij nauchnyj zhurnal. 2020; 4 (56): 163–173. (In Russian)

16. Zarapina L.S., Makaya L.M., Senibabnov S.A., Andrianov K.A., Zubkov A.F. Efficiency of asphalt granulate application in road repair and reconstruction. In: Proc. 9th Sci. Conf. ‘Stable Development of the Region: Architecture, Construction, Transport’, 2022. Pp. 346–349. (In Russian)

17. Zubkov A.F. Parameter justification of contact between metal roller and compacted material. Dorozhno-transportnoe stroitel'stvo. 2004; (3): 77. (In Russian)

18. Piletskii M.E., Andrianov K.A., Zubkov A.F. Influence of the load-carrying capacity of vehicles when performing repair works of road pavements by means of the jet-injection method. Russian Journal of Building Construction and Architecture. 2020; 1 (45): 42–54.

19. Zubkov A.F., Zarapina L.S., Andrianov K.A. Loading effect on elastic modulus of asphalt granular layer during pavement repair. Nauchnyj zhurnal stroitel'stva i arhitektury. 2022; 1 (65): 96–105. (In Russian)

20. Zubkov A.F., Andrianov K.A., Senibabnov S.A. Modeling of asphalt granulate compaction processes using experimental data. In: Proc. 8th Int. Symp. ‘Relevant Problems of Computer Modeling of Structures’. 2023. Pp. 293–295. (In Russian)