Use of Innovative Recycling Agents for Improving the Sustainability and Durability of Asphalt Pavement

Mohammad, Louay N.; Elnaml, Ibrahim

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Use of Innovative Recycling Agents for Improving the Sustainability and Durability of Asphalt Pavement

2025-08-01
By Mohammad, Louay N. ; Elnaml, Ibrahim

File Language:

English

Details

Creators:

Mohammad, Louay N. ; Elnaml, Ibrahim
Corporate Creators:

Louisiana Transportation Research Center ; Louisiana State University
Corporate Contributors:

Louisiana. Department of Transportation and Development ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Asphalt Mixtures Binder Content Durability High Performance Concrete Iron Oxides Lewis Acid Catalyst
Publication/ Report Number:

FHWA/LA.25/716
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report 2/2021 - 6/2024
Corporate Publisher:

Louisiana. Department of Transportation and Development
Abstract:

The use of reclaimed asphalt pavement (RAP) as a partial replacement for virgin aggregates and asphalt binders has received considerable attention in recent years due to its economic and environmental benefits. These benefits include a potential reduction in asphalt mixture cost and the promotion of sustainability. However, many state Departments of Transportation are cautious in adopting high RAP content (>25%) into their asphalt mixture designs because of cracking and durability issues resulting from the aged RAP binder. This study considered two approaches to mitigate concerns regarding hardened and oxidized aged RAP binders: (1) reagent catalyst (Lewis acid type—iron chloride, FeCl3) to modify the asphalt binder’s chemical composition and disrupt the associated molecules formed in the aged RAP binder; and (2) the application of petroleum-based and bio-derived recycling agents (RAs) to improve the cracking resistance of asphalt mixtures containing aged RAP binder (>25%).
Format:

PDF
Funding:

21-3B, DOTLT1000392
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:8941ef9a9f0f25ffb8cb0afd3c89110f0e468c39692540a4d04d38dbf641140dbe496e656672af14b00c6309b5e95c33fdd8b7f24615404675603b5c70cb7b96
Download URL:

https://rosap.ntl.bts.gov/view/dot/86848/dot_86848_DS1.pdf
File Type:

[PDF - 2.56 MB ]

File Language:

English

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