Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders

Materials

Wojciech Sorociak¹  Jan Kempa²  Bartosz Budziński³  Paweł Mieczkowski³  Mieczysław Słowik⁴ 

[1] Faculty of Civil Engineering, Silesian University of Technology, Akademicka St. 2, 44-100 Gliwice, Poland;Faculty of Civil and Environmental Engineering and Architecture, UTP University of Science and Technology in Bydgoszcz, Al. Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland;Faculty of Civil and Environmental Engineering, West Pomeranian University of Technology Szczecin, Al. Piastów 17, 70-310 Szczecin, Poland;Faculty of Civil and Transport Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznań, Poland;

关键词: asphalt binder;    styrene–butadiene–styrene copolymer;    force ductility test;    rheology;    modified bitumen;   

DOI  :  10.3390/ma14071734

来源: DOAJ

【 摘 要 】

The requirements imposed on road pavements are ever increasing nowadays, necessitating the improvement of the properties of paving materials. The most commonly used paving materials include bituminous mixtures that are composed of aggregate grains bound by a bituminous binder. The properties of bitumens can be improved by modification with polymers. Among the copolymers used for modifying bitumens, styrene–butadiene–styrene, a thermoplastic elastomer, is the most commonly used. This article presents the results of tests conducted on bitumens modified with two types of styrene–butadiene–styrene copolymer (linear and radial). Two bitumen types of different penetration grades (35/50 and 160/220) were used in the experiments. The content of styrene–butadiene–styrene added to the bitumen varied between 1% and 6%. The results of the force ductility test showed that cohesion energy can be used for qualitative evaluation of the efficiency of modification of bitumen with styrene–butadiene–styrene copolymer. The determined values of the cohesion energy were subjected to the original analysis taking into account the three characteristic elongation zones of the tested binders. The performed analyses made it possible to find a parameter whose values correlate significantly with the content of styrene–butadiene–styrene copolymer in the modified bitumen. With smaller amounts of added modifier (approximately 2%), slightly better effects were obtained in the case of linear copolymer styrene–butadiene–styrene and for larger amounts of modifier (5–6%) radial copolymer styrene–butadiene–styrene was found to be more effective. This is confirmed by the changes in the binder structure, as indicated by the penetration index (PI).

【 授权许可】

Unknown