Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Moisture-induced damage resistance, stiffness and fatigue life of asphalt mixtures with different aggregate-binder adhesion properties
Graphical abstract Display Omitted
Highlights Aggregate source proved to be relevant for stripping and for moisture-induced damage. Mixtures with the same base bitumen had stiffnesses differing in asymptotic elastic moduli. Anti-stripping agent increased fatigue life of the investigated asphalt mixtures. HMA with better aggregate-binder adhesiveness have shown longer fatigue life. Adhesiveness seems to delay of microcraks when strain amplitudes are small.
Abstract This study investigated the effects of aggregate-binder adhesiveness on moisture damage and on fatigue life of four different asphalt mixtures. Adhesivemeness was assessed by: (i) qualitative observation of binder stripping from the coarse aggregate’s surface, incremented in this paper with digital image processing, and (ii) modified Lottman test. Fatigue damage modeling was performed, using tension-compression test results. The granitic aggregate produced mixtures with better moisture resistance and fatigue properties when compared to the phonolitic aggregate (same ranking as for aggregate-binder adhesiveness). The same was observed for mixtures with binder containing an anti-stripping agent. It was demonstrated that mixtures with better aggregate-binder adhesiveness have greater fatigue life.
Moisture-induced damage resistance, stiffness and fatigue life of asphalt mixtures with different aggregate-binder adhesion properties
Graphical abstract Display Omitted
Highlights Aggregate source proved to be relevant for stripping and for moisture-induced damage. Mixtures with the same base bitumen had stiffnesses differing in asymptotic elastic moduli. Anti-stripping agent increased fatigue life of the investigated asphalt mixtures. HMA with better aggregate-binder adhesiveness have shown longer fatigue life. Adhesiveness seems to delay of microcraks when strain amplitudes are small.
Abstract This study investigated the effects of aggregate-binder adhesiveness on moisture damage and on fatigue life of four different asphalt mixtures. Adhesivemeness was assessed by: (i) qualitative observation of binder stripping from the coarse aggregate’s surface, incremented in this paper with digital image processing, and (ii) modified Lottman test. Fatigue damage modeling was performed, using tension-compression test results. The granitic aggregate produced mixtures with better moisture resistance and fatigue properties when compared to the phonolitic aggregate (same ranking as for aggregate-binder adhesiveness). The same was observed for mixtures with binder containing an anti-stripping agent. It was demonstrated that mixtures with better aggregate-binder adhesiveness have greater fatigue life.
Moisture-induced damage resistance, stiffness and fatigue life of asphalt mixtures with different aggregate-binder adhesion properties
Júnior, Jorge L.O. Lucas (Autor:in) / Babadopulos, Lucas F.A.L. (Autor:in) / Soares, Jorge B. (Autor:in)
Construction and Building Materials ; 216 ; 166-175
26.04.2019
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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