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

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 bitu...

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Main Authors: Paweł Mieczkowski, Bartosz Budziński, Mieczysław Słowik, Jan Kempa, Wojciech Sorociak
Format: Article
Language:English
Published: MDPI AG 2021-04-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/14/7/1734
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spelling doaj-c658559e30db4199961190083d5687a62021-04-01T23:09:11ZengMDPI AGMaterials1996-19442021-04-01141734173410.3390/ma14071734Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt BindersPaweł Mieczkowski0Bartosz Budziński1Mieczysław Słowik2Jan Kempa3Wojciech Sorociak4Faculty of Civil and Environmental Engineering, West Pomeranian University of Technology Szczecin, Al. Piastów 17, 70-310 Szczecin, PolandFaculty of Civil and Environmental Engineering, West Pomeranian University of Technology Szczecin, Al. Piastów 17, 70-310 Szczecin, PolandFaculty of Civil and Transport Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznań, PolandFaculty of Civil and Environmental Engineering and Architecture, UTP University of Science and Technology in Bydgoszcz, Al. Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, PolandFaculty of Civil Engineering, Silesian University of Technology, Akademicka St. 2, 44-100 Gliwice, PolandThe 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).https://www.mdpi.com/1996-1944/14/7/1734asphalt binderstyrene–butadiene–styrene copolymerforce ductility testrheologymodified bitumen
collection DOAJ
language English
format Article
sources DOAJ
author Paweł Mieczkowski
Bartosz Budziński
Mieczysław Słowik
Jan Kempa
Wojciech Sorociak
spellingShingle Paweł Mieczkowski
Bartosz Budziński
Mieczysław Słowik
Jan Kempa
Wojciech Sorociak
Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders
Materials
asphalt binder
styrene–butadiene–styrene copolymer
force ductility test
rheology
modified bitumen
author_facet Paweł Mieczkowski
Bartosz Budziński
Mieczysław Słowik
Jan Kempa
Wojciech Sorociak
author_sort Paweł Mieczkowski
title Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders
title_short Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders
title_full Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders
title_fullStr Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders
title_full_unstemmed Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders
title_sort experimental study of tensile properties of styrene–butadiene–styrene modified asphalt binders
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2021-04-01
description 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).
topic asphalt binder
styrene–butadiene–styrene copolymer
force ductility test
rheology
modified bitumen
url https://www.mdpi.com/1996-1944/14/7/1734
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