Life Cycle Costs Analysis of Reclaimed Asphalt Pavement (RAP) Under Future Climate

Sustainability

Yuefeng Zhu¹  Eshan Dave¹  Tony Parry²  Omar Valle³  Lingyun Mi⁴  Guodong Ni⁵  Zhenmin Yuan⁶  Yaning Qiao⁶ 

[1] Deep Underground Engineering, China University of Technology, Xuzhou 221116, China;Department of Civil and Environmental Engineering, University of New Hampshire, Durham, NH 03824, USA;Nottingham Transportation Engineering Centre, University of Nottingham, Nottingham NG7 2RD, UK;Pavement Department, Cemex, Managua 13061, Nicaragua;School of Management, China University of Technology, Xuzhou 221116, China;;State Key Laboratory for Geomechanics &

关键词: reclaimed asphalt pavement;    recycling;    life cycle cost;    climate downscaling;    performance;   

DOI  :  10.3390/su11195414

来源: DOAJ

【 摘 要 】

Reclaimed asphalt pavement (RAP) has received wide application in asphalt pavement construction and maintenance and it has shown cost-effectiveness over virgin hot mix asphalt (HMA). HMA with a high content of reclaimed asphalt (RA) (e.g., 40%) is sometimes used in practice, however, it may have significant adverse effects on the life cycle performance and related costs. In particular, challenges may arise as the life cycle performance of RAP is also affected by local climatic conditions. Thus, it is important to investigate whether it is still economic to use RAP under future local climate, with consideration of life cycle performance. A case study was conducted for various road structures on Interstate 95 (I-95) in New Hampshire (NH), USA for the investigation. The case study utilized dynamic modulus testing results for local virgin HMA and HMA with 40% RA (as major material alternatives) to predict life cycle performance of the selected pavement structures, considering downscaled future climates. Then, a life cycle cost analysis (LCCA) was considered to estimate and compare the life cycle cash flow of the investigated road structures. Responsive maintenance (overlay) and effectiveness were also considered in this study. It was found that using 40% RA in HMA can reduce agency costs by up to approximately 18% under the 2020−2040 predicted climate and NH should consider this practice under predicted future climate to reduce agency costs.

【 授权许可】

Unknown