The use of reclaimed asphalt pavement materials and warm-mix asphalt mixtures in the south-central states: Challenges and limitations

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Conference Proceeding

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Nowadays, reclaimed asphalt pavement (RAP) is becoming more popular in producing new asphalt mixtures since it is a cost-effective and environmentally-friendly approach. However, there are some negative impacts of using RAP in new mixtures, especially with high RAP content. Previous studies show that the mixtures containing high RAP content have poor fatigue and cracking performance. Warm-mix asphalt (WMA) technologies are used to counter the negative effects of RAP on cracking resistance of asphalt mixtures. In this paper, the current specifications used in the south-central states (i.e., Arkansas, Louisiana, New Mexico, Oklahoma, and Texas) and previous regional studies conducted on the use of RAP and WMA technologies are discussed. Based on these specifications, an overview of the challenges and limitations of producing mixtures containing high RAP content and WMA technologies is presented. The objective is to identify deficiencies that currently exist in these specifications toward the implementation of these technologies.

Publication Source (Journal or Book title)

Tran-SET 2020 - Proceedings of the Tran-SET Conference 2020

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