Laboratory studies to reduce the technological aging of bitumen

published:
Number: Issue 18(2018)
Section: Construction and civil engineering
The page spacing of the article: 107-118
Keywords: asphalt concrete, bitumen, energy-saving additive, compounding, aging of bitumen,surfactants.
How to quote an article: Ivan Kopynets, Oksana Sokolova, Iryna Gudyma, Alina Yunak Laboratory studies to reduce the technological aging of bitumen. Dorogi і mosti [Roads and bridges]. Kyiv, 2018. 18. P. 107-118 [in English]

Authors

State Enterprise «National Institute of Infrastructure Development» (SE «NIDI»), Kyiv, Ukraine
https://orcid.org/0000-0002-5294-5554
M.P. Shulgin State Road Research Institute State Enterprise, Kyiv, Ukraina
https://orcid.org/0000-0003-4544-6551
State Enterprise «National Institute of Infrastructure Development» (SE «NIDI»), Kyiv, Ukraine
https://orcid.org/0000-0002-0908-4795
State Enterprise «National Institute of Infrastructure Development» (SE «NIDI»), Kyiv, Ukraine
https://orcid.org/0000-0003-4202-8661

Summary

Introduction. Long performance of pavements is ensured by preserving the stability of their basic physical and mechanical characteristics under various operating loads and weather and climatic conditions. One of the main factors contributing to such stability is aging resistance of bitumen.
Problem statement. Aging bitumen process is a combination of irreversible changes in the structure and physical and technical characteristics of bitumen that occur when using them exposed to external factors. The most rapid aging of bitumen occurs in the thin films at the preparation of asphalt mixes. Also, during the operation of asphalt pavements, constant changes in the properties of bitumen leading to the deterioration of its quality and the destruction of asphalt are continuously occur.
Purpose. Development of technologies aimed at reducing the aging of bitumen during technological processing which will improve the quality of bitumen and asphalt concrete and extend the service life of road pavements.
Results. In this paper, measures and technologies for improving the stability of bitumen and asphalt to technological aging are defined. Introduction of surfactants in bitumen virtually does not affect its physical and technical properties. However, they enable increasing stability of oxidized bitumen to aging by changing the structure formation processes in bitumen and adsorption of surfactants on asphaltenes.
Compounding of oxidized bitumen with residual bitumen leads to increase in its residual penetration and reduction in the aging indices.
Use of energy-saving additives allows reducing the temperature of preparation and compaction of asphalt mixes, thereby promoting reducing thermo-oxidative aging of bitumen and thus increasing its durability.
Conclusions. Developed technologies for increasing the stability of bitumen and asphalt concrete to aging will extend the service life of road pavements.

References

1. Kolbanovska A. S., Mikhailov V. V. Road bitumens: Tutorial. Moscow, 1973. 264 p. [in Russian].
 
2. Rudenska I.M., Gorelysheva L.A., Izmailov A.N. Features of road bitumen structure of different origin according to the electronic microscopy data. Neftepererabotka i neftehimiâ. Moscow, 1979. 3. 18-20 p. [in Russian].
 
3. EN 12607-1:2014 Bitumen and bituminous binders - Determination of the resistance to hardening under influence of heat and air. Part 1: RTFOT method. Brussels, 2014. 15 p. (Information and documentation) [in English].
 
4. State Standard of Ukraine (DSTU 4044-2001) Bitumy naftovi dorozhni viazki. Tekhnichni umovy (Viscous petroleum road bitumens. Specifications.) Kyiv, 2001. 15 p. (Information and documentation) [in Ukrainian].
 
5. EN 1426:2015 Bitumen and bituminous binders - Determination of needle penetration. Brussels, 2015. 14 p. (Information and documentation) [in English].
 
6. EN 1427:2015 Bitumen and bituminous binders - Determination of softening point. Ring and Ball method. Brussels, 2015. 18 p. (Information and documentation) [in English].
 
7. EN 12593:2015 Bitumen and bituminous binders - Determination of Fraass breaking point. Brussels, 2015. 17 p. [in English].
 
8. ASTM D113-17 Standard Test Method for Ductility of Asphalt Materials. The USA, 2017. 5 p. (Information and documentation) [in English].
 
9. EN 13302:2010 Bitumen and bituminous binders - Determination of dynamic viscosity of bituminous binder using a rotating spindle apparatus. Brussels, 2010. P. 13. (Information and documentation) [in English].
 
10. Israilova Z.S. The impact of bitumen technology on the resistance to aging, PhD (Ing.). Astrakhan, 2012. 24 p. [in Russian].
 
11. Nat Chan Tian. Regulation of thermo-oxidative stability of road bitumen and bituminous materials, PhD (Ing.). Moscow, 2010. P. 26 [in Russian].
 
12. EN 12591:2009 Bitumen and bituminous binders - Specifications for paving grade bitumens. Brussels, 2009. P. 29. (Information and documentation) [in English].
 
13. State Standard of Ukraine (DSTU B V.2.7-319:2016) Sumishi asfaltobetonni i asfaltobeton dorozhnii ta aerodromnyi. Metody vyprobuvan (Asphaltic concrete mixtures, road and aerodromes asphaltic concrete. Test methods). Kyiv, 2017. 75 p. [in Ukrainian].