|
Title
|
|
|
|
Application of a fatigue cracking model to predict service life in the life cycle cost analysis of asphalt base layers containing various rates of reclaimed asphalt pavement
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| The road industry is confronted with the search for new materials and means to lower their economic impact as well as better/more accurate evaluation methods. Life cycle cost analysis (LCCA) has been of great interest as it is a useful tool in assisting road agencies to make better investment decisions. Furthermore, using reclaimed asphalt pavement (RAP) has shown to be a viable option to reduce virgin material use and to lessen the economic impact of the asphalt industry. However, literature shows that previous research often does not adjust service life (SL) in LCCA calculations when considering different design alternatives (e.g., varying RAP content), even though mechanical tests clearly exhibit a difference in performance. The main objective of this study consists of two parts: 1) to evaluate the effect of multiple RAP contents on the SL of asphalt base layers, and 2) to compare the LCCA of asphalt base layers when using a fixed or variable SL. Five AC14 asphalt base alternatives with varying recycling rates (0%, 20%, 40%, 60%, and 80% RAP) were designed. The predicted SLs increased with increasing RAP content and varied between 21 years and 27 years, while the reference SL for an asphalt base layer is typically considered as 20 years. After implementing this adjusted SL in an LCCA, it was concluded that a fixed SL of 20 years overestimated the net present value (NPV) by 3% to 18%. Furthermore, the total NPV decreased by 13% to 53% when using 20% to 80% RAP, respectively |
| |
|
Language
|
|
|
|
English
| |
|
Source (book)
|
|
|
|
Doing Business in Post Pandemic World : proceedings of the 12th Annual Global Business Conference (GBC 2021), 22-25 September, 2021, Zagreb, Croatia
| |
|
Publication
|
|
|
|
Zagreb
:
Innovation Institute - Institut za inovacije
,
2021
| |
|
Volume/pages
|
|
|
|
p. 104-119
| |
|
Full text (open access)
|
|
|
|
| |
|