Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Life Cycle Assessment of Hot Mix Asphalt Production with Reclaimed Asphalt Pavement in Washington State

Version 1 : Received: 16 December 2020 / Approved: 18 December 2020 / Online: 18 December 2020 (07:21:13 CET)

How to cite: Zokaei Ashtiani, M. Life Cycle Assessment of Hot Mix Asphalt Production with Reclaimed Asphalt Pavement in Washington State. Preprints 2020, 2020120442 (doi: 10.20944/preprints202012.0442.v1). Zokaei Ashtiani, M. Life Cycle Assessment of Hot Mix Asphalt Production with Reclaimed Asphalt Pavement in Washington State. Preprints 2020, 2020120442 (doi: 10.20944/preprints202012.0442.v1).

Abstract

This study is an attempt to create a framework, using the best available inventory data, to perform lifecycle assessment (LCA) on asphalt pavement production. In particular, the use of reclaimed asphalt pavement (RAP) as an end-of-life product of deteriorated pavements is under consideration. Following ISO 14000 series standards, the framework constitutes the four major LCA steps in defining goal and scope, lifecycle inventory analysis, environmental impact assessment, and results interpretation. Three different scenarios in which varying portions of RAP are incorporated into hot mix asphalt production are to be compared. The system boundary of this study is limited to the construction and rehabilitation phases and ignores the vehicular use phase. It was found under this study that since high RAP mixtures require more frequent and aggressive maintenance activities, the overall footprint of asphalt pavements constructed with higher RAP contents is also higher. This would necessitate more efficient design procedures and protocols for mixtures produced with high RAP contents to compensate for their lack of long-term performance.

Subject Areas

lifecycle assessment; LCA; hot mix asphalt; reclaimed asphalt pavement; rehabilitation

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