Investigation of rheological properties of TPS modified bitumen

Abstract

Rheological properties of the virgin bitumen and TPS modified bitumen binders with several percentages of TPS additives were studied. All TPS modified bituminous binders were prepared on a laboratory scale. Dynamic shear rheometer (DSR) strain sweep test was made to measure the linear viscoelasticity areas of various bitumen binders at −20–70 °C, then temperature sweep test and frequency sweep test were made in the linear viscoelasticity areas. Complex modulus master curves were drawn to analyze and compare various bitumen binders’ rheological properties. Based on the test results, the ideal percentage of TPS additive was brought forward. The results show that TPS modified bitumen binders have more excellent properties at high, medium and low temperatures compared with original bitumen. The dosages of TPS additive are vital to their properties.

Keywords

TPS modified bitumen binders / temperature sweep test / frequency sweep test / rheological properties

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