Dynamic Modulus and Field Performance of Cold-in-Place Recycled Asphalt Pavement | Journal of Engineering Sciences

Dynamic Modulus and Field Performance of Cold-in-Place Recycled Asphalt Pavement

Author(s): Islam M. R.1*, Kalevela S. A.1, Rivera J. A.1, Rashid T. B.2

Affiliation(s): 
1 Department of Engineering Technology, Colorado State University, Pueblo, CO 81001, Colorado, USA;
2 Department of Electrical and Computer Engineering, University of Colorado at Colorado Springs, CO 81001, Colorado, USA

*Corresponding Author’s Address: md.islam@csupueblo.edu

Issue: Volume 6; Issue 2 (2019)

Dates:
Paper received: September 1, 2019
The final version of the paper received: November 23, 2019
Paper accepted online: November 28, 2019

Citation:
Islam M. R., Kalevela S. A., Rivera J. A., Rashid T. B. (2019). Dynamic modulus and field performance of cold-in-place recycled asphalt pavement. Journal of Engineering Sciences, Vol. 6(2), pp. B1-B7, doi: 10.21272/jes.2019.6(2).b1.

DOI: 10.21272/jes.2019.6(2).b1

Research Area:  MANUFACTURING ENGINEERING: Technical Regulations and Metrological Support

Abstract. 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.

Keywords: asphalt pavement, cold-in-place recycling, dynamic modulus, fatigue cracking, transverse cracking.

References:

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