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INVESTIGATION OF PHYSICAL AND MECHANICAL PROPERTIES OF ASPHALT MIXTURES MODIFIED BY ADHESIVE ADDITIVE

I. I. Mukhamatdinov, A. F. Kemalov, P. S. Fakhretdinov
Thursday 11 October 2018 by Libadmin2018

ABSTRACT

Asphalt concrete correspond to dispersive strengthened composition material, in which organic matrix-bitumen takes over all the load and forces. The structure and properties of asphalt concrete are determined mainly by the phase and physical state of the organic matrix-bitumen. In this paper the results of «Adgezolin» additive in the composition of asphalts based on oxidized (produced by OJSC «TAIF-NK») and non-oxidized (Elkhovskoe oil refinery plant) bitumen are discussed. It is revealed, that adhesive additive positively affects asphalt properties. Particularly, adding 0.8 wt % into oxidized bitumen increases R20 and R50, as well as improves R0 parameters. The asphalts based on non-oxidized BNN 80/120 bitumen stand for higher R20 and R50 values comparing with asphalt properties based on oxidized bitumen. However, adding adhesive to asphalts based on non-oxidized bitumen results to the highest strength values. At the same time the asphalt mixtures based on non-oxidized bitumen have higher water resistance value than asphalt based on oxidized bitumen, which makes the former more attractive.

Keywords: bitumen, mineral pavement, adhesion additive, compressive strength.


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