Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Laboratory Properties of a Rejuvenated Cold Recycled Mixture Produced in a Conventional Asphalt Plant
Cold central plant recycling (CCPR) is a pavement recycling technique where milled reclaimed asphalt pavement (RAP) from an asphalt pavement or an existing stockpile are recycled into a new pavement layer. The process has many environmental and economic benefits but often the recycling contractors producing the CCPR material and the owners of RAP are not the same companies. The use of CCPR as a pavement material could be greatly expanded if asphalt mixture contractors were able to produce a 100% (or nearly 100%) recycled material using their existing asphalt mixture plants. This study investigated the mechanical properties of a CCPR mixture produced using a bio-based rejuvenator containing an anti-strip agent in a conventional double-barrel drum asphalt plant. This mixture was produced without active fillers using a foamed asphalt recycling agent. The mechanical properties assessed included stiffness and crack susceptibility. The stiffness of the rejuvenated CCPR were found to be higher than traditional cold recycling techniques but less than that of the tested hot mix asphalt base mix at lower temperatures, but similar at higher temperatures. The rejuvenated CCPR mixture should have similar cracking performance when compared to a CCPR mixture using foam and/or emulsion plus cement as an active filler and mixed with a laboratory-scale pug mill that simulates the process from a field-scale CCPR plant.
Laboratory Properties of a Rejuvenated Cold Recycled Mixture Produced in a Conventional Asphalt Plant
Cold central plant recycling (CCPR) is a pavement recycling technique where milled reclaimed asphalt pavement (RAP) from an asphalt pavement or an existing stockpile are recycled into a new pavement layer. The process has many environmental and economic benefits but often the recycling contractors producing the CCPR material and the owners of RAP are not the same companies. The use of CCPR as a pavement material could be greatly expanded if asphalt mixture contractors were able to produce a 100% (or nearly 100%) recycled material using their existing asphalt mixture plants. This study investigated the mechanical properties of a CCPR mixture produced using a bio-based rejuvenator containing an anti-strip agent in a conventional double-barrel drum asphalt plant. This mixture was produced without active fillers using a foamed asphalt recycling agent. The mechanical properties assessed included stiffness and crack susceptibility. The stiffness of the rejuvenated CCPR were found to be higher than traditional cold recycling techniques but less than that of the tested hot mix asphalt base mix at lower temperatures, but similar at higher temperatures. The rejuvenated CCPR mixture should have similar cracking performance when compared to a CCPR mixture using foam and/or emulsion plus cement as an active filler and mixed with a laboratory-scale pug mill that simulates the process from a field-scale CCPR plant.
Laboratory Properties of a Rejuvenated Cold Recycled Mixture Produced in a Conventional Asphalt Plant
Bowers, B. F. (Autor:in) / Diefenderfer, B. K. (Autor:in) / Wollenhaupt, G. (Autor:in) / Stanton, B. (Autor:in) / Boz, I. (Autor:in)
International Airfield and Highway Pavements Conference 2019 ; 2019 ; Chicago, Illinois
Airfield and Highway Pavements 2019 ; 100-108
18.07.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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