Dynamic Modulus and Field Performance of Cold-in-Place Recycled Asphalt Pavement
This study investigates the dynamic modulus of cold-in-place recycling (CIR) asphalt material and its performance using pavement performance data and laboratory dynamic modulus testing. Colorado Department of Transportation (CDOT) has 37 projects with over 8 million square yards using CIR materials....
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Sumy State University
2019-09-01
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| Series: | Журнал інженерних наук |
| Subjects: | |
| Online Access: | http://jes.sumdu.edu.ua/wp-content/uploads/2019/11/JES_2019_02_B1-B7.pdf |
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| Summary: | This study investigates the dynamic modulus of cold-in-place recycling (CIR) asphalt material and its performance using pavement performance data and laboratory dynamic modulus testing. Colorado Department of Transportation (CDOT) has 37 projects with over 8 million square yards using CIR materials. Sites from ten projects were selected to monitor the performances and collect samples for laboratory testing. Dynamic modulus testing on the CIR cores was conducted by the CDOT. Results show measured distresses of CIR rehabilitation techniques are mostly below the threshold values during the service period. International Roughness Index, rutting, and transverse cracking never exceeded the threshold values during the studied period. Only two CIR pavements exceeded the threshold values for fatigue cracking after 8-10 years of service. Measured distresses of CIR rehabilitation techniques are similar to conventional pavements based on engineering judgment. The laboratory dynamic modulus test results show CIR has about 50 % less dynamic modulus compared to the traditional asphalt mixture. |
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| ISSN: | 2312-2498 2414-9381 |