Nanotubes as a modifier pbb and asphalt concrete

Abstract

Abstract. New method of quality improvement of the polymer modified binder (PMB) was considered in the paper. Testify to the fact that PMB modified by nanoagent is less sensitive to aging, as a result of the processes of peptization asphaltene-resin complexes (ARC) in the structure of the modified binder and the crosslinking with the polymer matrix. It is demonstrated that the nanotubes, (SWCNT or MWCNT) using as a modifier, have effect of crosslinking agent and the inhibitor of the aging process of a PBB. The influence of nanomodified PBB on strength and deformation properties of asphalt concrete is researched. It is found that the application of modified binder in the asphalt concrete mixtures enhances the water resistance of asphalt concrete, heat resistance, and shear resistance.

An overview of use of nanoadditives in enhancing the properties of pavement construction binder bitumen

“…Use of CNTs as an additive enhances the water resistance of asphalt concrete, heat resistance, cold resistance, shear resistance and increased strength. This property enables increased resistance to aggressive effects of rainfall and wastewater, thus protecting bitumen road surface and preventing premature failure (Vysotskaya and Shekhovtsova, 2015; Urkhanova et al , 2015) (Figure 1).…”

Nanosized carbon modifier used to control plastic deformations of asphalt concrete

“…Basing on the studies carried out earlier [17][18], where optimal and efficient modes of dispersion and uniform distribution of SWCNT in the volume of the modified binder matrix were selected, based on bitumen BND 60/90, and an optimal concentration range was established in which the effectiveness of CNM introduction into the composition of the PBB, the concentration of SWCNT equal to 2·10 -3 % was adopted.…”

“…Application of such technology makes it possible to improve the effectiveness of macromodification [12][13]. Besides, it helps inhibit their deficiencies [14][15][16][17][18].…”