Life-cycle assessment of asphalt pavement recycling

2020 ◽  
pp. 77-93
Author(s):  
Xiaodan Chen ◽  
Hao Wang
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Asphalt Pavement ◽  
Pavement Recycling

scholarly journals Reuse of bituminous pavements: A mini-review of research, regulations and modelling

2016 ◽  
Vol 35 (4) ◽  
pp. 357-366 ◽  
Author(s):  
Joke Anthonissen ◽  
Wim Van den bergh ◽  
Johan Braet
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
End Of Life ◽  
Asphalt Pavement ◽  
Life Stage ◽  
Life Cycle Stage ◽  
Supplementary Information ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Bituminous Mixtures

Bituminous pavement can be recycled – even multiple times – by reusing it in new bituminous mixtures. If the mechanical properties of the binder get worse, this reclaimed asphalt is often used in the sub-structure of the road. Apparently, up till now, no end-of-life phase exists for the material. Actually, defining the end-of-life and the end-of-waste stage of a material is important for life cycle assessment modelling. Various standards and scientific studies on modelling life cycle assessment are known, but the crucial stages are not yet defined for reclaimed asphalt pavement. Unlike for iron, steel and aluminium scrap, at this moment, no legislative end-of-waste criteria for aggregates are formulated by the European Commission. More research is necessary in order to develop valuable end-of-life criteria for aggregates. This contribution is a mini-review article of the current regulations, standards and studies concerning end-of-life and end-of-waste of reclaimed asphalt pavement. The existing methodology in order to define end-of-waste criteria, a case study on aggregates and the argumentation used in finished legislative criteria are the basis to clarify some modelling issues for reclaimed asphalt material. Hence, this contribution elucidates the assignment of process environmental impacts to a life cycle stage as defined by EN15804, that is, end-of-life stage (C) and the supplementary information Module D with benefits and loads beyond the system boundary.

Use of Life Cycle Assessment for asphalt pavement at the network and project levels

2014 ◽  
pp. 1797-1806 ◽  
Author(s):  
John Harvey ◽  
Alissa Kendall ◽  
Nick Santero ◽  
Ting Wang
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Asphalt Pavement

Development of Roughness Prediction Models for Life Cycle Assessment Studies of Recycled Pavement Projects

2021 ◽  
pp. 036119812110299
Author(s):  
Eugene A. Amarh ◽  
Gerardo W. Flintsch ◽  
Joao Santos ◽  
Brian K. Diefenderfer
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Prediction Models ◽  
Rate Of Change ◽  
Full Depth Reclamation ◽  
Lack Of Information ◽  
Pavement Recycling ◽  
Roughness Prediction ◽  
The Individual ◽  
Virginia Department

The few existing life cycle assessment studies considering pavement recycling techniques usually omit the stages of maintenance and rehabilitation (M&R) and use. The reason for this omission is the lack of information about how the pavement’s performance evolves over time and absence of methods to determine the M&R frequency and service life for completed projects. As a result, the deterioration of pavement recycling projects in the long term is not clearly understood. Few projects have available data, the majority of which are on low volume primary and secondary roads. This paper describes an approach to develop a family of roughness models for recycling projects in Colorado using functional data analysis, and individual models for selected projects in Virginia to support ongoing life cycle assessment (LCA) studies. In the case of Colorado, full depth reclamation (FDR) projects will most likely deteriorate following an average group rate of 1.4 in./mi/year, with an initial international roughness index (IRI) between 52 and 70 in./mi. For the individual roughness models developed for Virginia projects, the initial IRI values and the rate of change for the treatments analyzed were found to range between 49 and 107 in./mi and between 0.7 and 5.2 in./mi/year, respectively, depending on the recycling method and type of stabilization treatment. The results of an LCA case study show that, in addition to recycling, Virginia Department of Transportation can achieve statewide emission reduction goals if focus is placed on achieving smoother roads while measures are taken to keep the annual rates of deterioration low.

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