(2007) Validation of the New Mix Design Process for Cold In-Place Rehabilitation Using Foamed Asphalt, 2007. University of Iowa
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Abstract
Asphalt pavement recycling has grown dramatically over the last few years as a viable technology to rehabilitate existing asphalt pavements. Iowa's current Cold In-place Recycling (CIR) practice utilizes a generic recipe specification to define the characteristics of the CIR mixture. As CIR continues to evolve, the desire to place CIR mixture with specific engineering properties requires the use of a mix design process. A new mix design procedure was developed for Cold In-place Recycling using foamed asphalt (CIR-foam) in consideration of its predicted field performance. The new laboratory mix design process was validated against various Reclaimed Asphalt Pavement (RAP) materials to determine its consistency over a wide range of RAP materials available throughout Iowa. The performance tests, which include dynamic modulus test, dynamic creep test and raveling test, were conducted to evaluate the consistency of a new CIR-foam mix design process to ensure reliable mixture performance over a wide range of traffic and climatic conditions. The “lab designed” CIR will allow the pavement designer to take the properties of the CIR into account when determining the overlay thickness.
| Item Type: | Departmental Report |
|---|---|
| Keywords: | Pavements, Asphalt, Recycling, Foamed Materials |
| Subjects: | Transportation > Research Transportation Transportation > Design and Construction |
| ID Code: | 5311 |
| Deposited By: | Margaret Noon |
| Deposited On: | 28 Aug 2007 |
| Last Modified: | 28 Aug 2007 |
| URI: | http://publications.iowa.gov/id/eprint/5311 |
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