Abstract
The effects of styrene–butadiene–styrene (SBS) and SBS with new reactive terpolymer (Entira®Bond 8) modifications on the rheological properties of pure bitumen were investigated and compared to each other. Four polymer modified bitumens (PMBs) were produced by mixing bitumen with SBS at two polymer contents and with SBS+Entira®Bond 8 at the same polymer contents.The rheologic characteristics of the PMBs were analyzed by means of conventional test methods like penetration, softening point and Fraas breaking point as well as rotational viscometer (RV), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test methods.Conventional binder properties of different PMB groups demonstrated that the polymers increase stiffness (hardness) and improve susceptibility of pure bitumen to temperature changes. Both polymers groups improve properties of bitumen, such as increased elastic responses (increased complex shear modulus and decreased phase angle) at low to high temperatures and reduced creep stiffness at low temperatures.Based on the results of this investigation it can be noted that SBS+Entira®Bond 8 modifications improved the conventional and more fundamental properties of bitumen better than just SBS modifications.
Published Version
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