• Yanhai Yang School of Transportation Engineering, Shenyang Jianzhu University
  • Liang Yue Shenyang Jianzhu University
  • Huaizhi Zhang School of Transportation Engineering, Shenyang Jianzhu University
  • Ye Yang School of Transportation Engineering, Shenyang Jianzhu University; 2. College of Transportation Engineering, Dalian Maritime University




Road engineering, Cold central plant recycling, Pavement surface condition index, Decay equation, Equivalent thickness coefficient


        This research focuses on the equivalent relationship between cold central plant recycling mixture and hot mix asphalt. In this paper, the pavement surface condition index (PCI) was calculated by the road surface conditions investigating, which was used as the evaluation standard. The unreasonable data were removed by SPSS software. The existing decay equation of pavement performance was simplified by MATLAB, and optimized by the Marquardt and global optimization methods. The survey data were fitted nonlinearly by 1stOpt software. Ultimately, the multivariate nonlinear regression optimization equation of the equivalent thickness coefficient was established. The results show that the cold central plant recycling with the emulsified asphalt (CREA) pavement equivalent thickness coefficient is 0.587. The cold central plant recycling with the foamed asphalt (CRFA) pavement equivalent thickness coefficient is 0.632. In addition, the performance of 10 cm cold central plant recycling pavement is equivalent to 6 cm the traditional hot mix asphalt pavement. The dispersion of the CREA is greater than that of the CRFA significantly.


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How to Cite

Yang, Y., Yue, L., Zhang, H., & Yang, Y. (2022). EQUIVALENT THICKNESS COEFFICIENT OF COLD CENTRAL PLANT RECYCLING PAVEMENT STRUCTURE. Stavební Obzor - Civil Engineering Journal, 31(2). https://doi.org/10.14311/CEJ.2022.02.0019