Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low Temperature Behavior of Asphaltite Modified Binders and Asphalt Concretes
Natural asphalts are often used as stiffeners to obtain hard bitumens. With the decrease of the global production of hard bitumens, the use of natural asphalts as stiffeners becomes increasingly interesting. The main concern when natural asphalts are used as modifiers, is the behavior at low temperature (LT). Studies have shown a brittle behavior in the LT domain, especially when high-content-asphaltene natural asphalts, like the Gilsonite, are used. In the context of a wider study, carried out in IFSTTAR, we have tested the low-temperature behavior of asphaltite modified bitumens (AMB) and that of corresponding asphalt concretes. The Selenizza® asphaltite is used at 5, 10 and 15% to modify a pure petroleum bitumen of 50/70 penetration grade. Asphalt concretes of type EME were then produced. 3P bending tests on notched bitumen bars were performed in order to assess the cracking temperature of binders. On the asphalt concrete scale, thermal stress restrain tests and traction resistance tests at low temperatures were carried out in order to assess the low temperature behavior. Equivalent materials (pure refinery binders and EME produced with hard petroleum binder) were also tested in order to have references. Compared to these equivalent materials, the asphaltite stiffened materials (AMB and corresponding asphalt concretes) present comparable, and in some cases, better LT behavior.
Low Temperature Behavior of Asphaltite Modified Binders and Asphalt Concretes
Natural asphalts are often used as stiffeners to obtain hard bitumens. With the decrease of the global production of hard bitumens, the use of natural asphalts as stiffeners becomes increasingly interesting. The main concern when natural asphalts are used as modifiers, is the behavior at low temperature (LT). Studies have shown a brittle behavior in the LT domain, especially when high-content-asphaltene natural asphalts, like the Gilsonite, are used. In the context of a wider study, carried out in IFSTTAR, we have tested the low-temperature behavior of asphaltite modified bitumens (AMB) and that of corresponding asphalt concretes. The Selenizza® asphaltite is used at 5, 10 and 15% to modify a pure petroleum bitumen of 50/70 penetration grade. Asphalt concretes of type EME were then produced. 3P bending tests on notched bitumen bars were performed in order to assess the cracking temperature of binders. On the asphalt concrete scale, thermal stress restrain tests and traction resistance tests at low temperatures were carried out in order to assess the low temperature behavior. Equivalent materials (pure refinery binders and EME produced with hard petroleum binder) were also tested in order to have references. Compared to these equivalent materials, the asphaltite stiffened materials (AMB and corresponding asphalt concretes) present comparable, and in some cases, better LT behavior.
Low Temperature Behavior of Asphaltite Modified Binders and Asphalt Concretes
Lecture Notes in Civil Engineering
Raab, Christiane (Herausgeber:in) / Themeli, Andrea (Autor:in) / Chailleux, Emmanuel (Autor:in) / Chazallon, Cyrille (Autor:in) / Bueche, Nicolas (Autor:in)
20.06.2020
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Performance of Fiber-Reinforced Asphalt Concretes with Various Asphalt Binders in Thailand
| British Library Online Contents | 2018
| Springer Verlag | 2011