Cold Asphalt Recycling Technologies Using Rejuvenating Asphalt Emulsion: Impact, Implementation, Specification
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2024-08-01
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Alternative Title:Feasibility Study of Cold Asphalt Recycling Technologies Using Rejuvenating Asphalt Emulsion: Impact, Implementation, Specification [Title from Cover]
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Edition:Final Report
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Abstract:Cold-recycling processes such as Cold in Place Recycling (CIR) and Cold-Central Plant Recycling (CCPR) offer opportunities for innovation through the use of recycling additives (RAs). The objective of this project was to evaluate the efficacy of rejuvenating asphalt emulsions in the CIR and/or CCPR process in terms of potential performance benefits relative to existing stabilization options. An experimental matrix was designed to include several of the mix design factors known or thought to control mix performance. Rejuvenating asphalt emulsions containing both Bio-based and petroleum-based RAs were produced and compared to a control engineered emulsion with a proven field history of performance. Inclusion of RAs did not negatively impact mixture stability or the mechanism of strength, while generally improving the CT Index of the tested cold recycled mixes compared to the use of a similarly graded control emulsion.
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