Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanical properties of tri-modal epoxy asphalt composites
Epoxy asphalt composites (EACs) are deemed to be the prior choice for the next generation of long-life pavement material because of their excellent mechanical properties and thermal stability. However, the much higher initial paving costs of EACs than those of traditional thermoplastic polymer-modified asphalts limit their popularisation. To pursue higher-performances-lower-costs EACs, inspired by the ‘multimodal networks’ theory, anhydrides-cured tri-modal rubber-like epoxy asphalt composites (REACs) were conceived and prepared by incorporating reactive styrene butadiene styrene grafted by maleic anhydride (SBS-g-MA), i.e. reactive very long chains (rVLCs), to our previous bi-modal REACs (whose curing agents are composed of two different molecular weights, i.e. short chains and long chains). Their tensile properties and thermo-rheological properties were characterised by means of tensile tester and dynamic shear rheometer (DSR). Results demonstrated that the content of rVLCs has a significant influence on the mechanical properties of the tri-modal EACs. As a result, there is a moderate rVLCs content (1.5 wt.%) based on which the formed tri-modal REACs can achieve higher performance and potentially lower cost for the next generation pavement.
Mechanical properties of tri-modal epoxy asphalt composites
Epoxy asphalt composites (EACs) are deemed to be the prior choice for the next generation of long-life pavement material because of their excellent mechanical properties and thermal stability. However, the much higher initial paving costs of EACs than those of traditional thermoplastic polymer-modified asphalts limit their popularisation. To pursue higher-performances-lower-costs EACs, inspired by the ‘multimodal networks’ theory, anhydrides-cured tri-modal rubber-like epoxy asphalt composites (REACs) were conceived and prepared by incorporating reactive styrene butadiene styrene grafted by maleic anhydride (SBS-g-MA), i.e. reactive very long chains (rVLCs), to our previous bi-modal REACs (whose curing agents are composed of two different molecular weights, i.e. short chains and long chains). Their tensile properties and thermo-rheological properties were characterised by means of tensile tester and dynamic shear rheometer (DSR). Results demonstrated that the content of rVLCs has a significant influence on the mechanical properties of the tri-modal EACs. As a result, there is a moderate rVLCs content (1.5 wt.%) based on which the formed tri-modal REACs can achieve higher performance and potentially lower cost for the next generation pavement.
Mechanical properties of tri-modal epoxy asphalt composites
Wang, Chong (Autor:in) / Wu, Qiang (Autor:in) / Liu, Yongchang (Autor:in) / Zhang, Meng (Autor:in) / Zhang, Zetian (Autor:in) / Zhou, Dunhong (Autor:in) / Kang, Yang (Autor:in)
International Journal of Pavement Engineering ; 23 ; 5118-5126
06.12.2022
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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