Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 7, pp. 1310−1313.
Pleiades Publishing, Ltd., 2009.
Original Russian Text
R.Z. Shakhnazarli, N.Ya. Ishchenko, Kh.G. Nazaraliev, B.A. Mamedov, A.M. Guliev, 2009, published in Zhurnal Prikladnoi Khimii,
2009, Vol. 82, No. 7, pp. 1213−1217.
AND POLYMERIC MATERIALS
Polymer–Bitumen Compounds with Crumb Rubber,
Secondary Polyethylene, and Polyamide Fiber Waste
R. Z. Shakhnazarli, N. Ya. Ishchenko, Kh. G. Nazaraliev, B. A. Mamedov, and A. M. Guliev
Institute of Polymeric Materials, National Academy of Sciences of Azerbaijan, Sumgait, Azerbaijan
Received March 4, 2009
Abstract—The physicomechanical characteristics of a bitumen compound modified with secondary polyethylene,
polyamide fiber waste, and crumb rubber were examined.
In this study we examined the properties of bitumen
compounds prepared with secondary polyethylene (SPE),
polyamide ﬁ ber waster (PFW), and CR as ﬁ llers. The CR
was taken both as reclaim and in the modiﬁ ed form.
To determine the optimal formula of polymer–bitumen
compounds, we primarily examined the effect of CR,
SPE, and PFW on their properties.
We found that introduction of CR into bitumen
enhances the elasticity of the compounds but decreases
the ring-and-ball softening point. Addition of CR also
decreases the strain and enhances the crack resistance
of the pavement. Introduction of 5.0–20.0% SPE leads
to an increase in the ultimate strength to 0.82 MPa and
in the ring-and-ball softening point from 35 to 67°C
In so doing, the needle penetration and the extensibility
decrease, i.e., the strength properties of bitumen
Petroleum bitumens have a fairly complex composition,
being disperse systems. The bitumen binder used in
road building should meet the modern requirements.
As a rule, to obtain a high-quality bitumen binder, the
bitumen is subjected to modiﬁ cation. Both individual
compounds and oligomeric and polymeric products
are used as modiﬁ ers . In the development of new
polymeric composite materials, utilization of secondary
raw materials is promising from both economical and
environmental viewpoints [2, 3]. In particular, one of
modifying additives used is crumb rubber (CR) produced
from worn automobile tires after appropriate processing.
Crumb rubber is a cheap and readily available ﬁ ller. Its
performance is due to good elasticity, resistance to frost
and light, and other useful properties. In addition, such
ﬁ ller contains a large amount of antioxidants, which
enhances its resistance to thermal oxidative degradation
Table 1. Properties of a bitumen compound modiﬁ ed by SPE