Laboratory studies to reduce the technological aging of bitumen

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]


State Enterprise «National Institute of Infrastructure Development» (SE «NIDI»), Kyiv, Ukraine
M.P. Shulgin State Road Research Institute State Enterprise, Kyiv, Ukraina
State Enterprise «National Institute of Infrastructure Development» (SE «NIDI»), Kyiv, Ukraine
State Enterprise «National Institute of Infrastructure Development» (SE «NIDI»), Kyiv, Ukraine


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.


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