Исследование реологических свойств полимерно-битумных вяжущих
N.I. Bryzgalov, R.R. Akhmetzyanov (Institute of Geology and Oil and Gas Technologies, Kazan Federal University)
Keywords: Polymer-bitumen binder, thermoplastics, styrene-butadiene-styrene block polymer, dynamic viscosity, hysteresis loop, thixotropy.
Abstract. The article analyzes the research of rheological properties of polymer-bitumen binders. The conducted studies have shown that the introduction of a polymer additive based on a styrene-butadiene-styrene block polymer into bitumen leads to a significant increase in the values of the elastic modulus of the binder and a decrease in the values of dynamic viscosity with an increase in temperature from 40 to 120 ° C. It has been experimentally established that with a high content of a styrene-butadiene-styrene block copolymer, an increase in the values of the effective viscosity of the binder is observed. As a result of the conducted research, a direct correlation was established between the rheological characteristics of bitumen compositions and their standard performance indicators.