Implementation of Semi-Circular Bend (SCB) Test for QC/QA of Asphalt Mixtures

Mohammad, Louay; Liu, Jun; Cao, Wei; Barghabany, Peyman

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Implementation of Semi-Circular Bend (SCB) Test for QC/QA of Asphalt Mixtures

2024-06-01
By Mohammad, Louay ; Liu, Jun ; Cao, Wei

File Language:

English

Details

Creators:

Mohammad, Louay ; Liu, Jun ; Cao, Wei ; Barghabany, Peyman
Corporate Creators:

Louisiana Transportation Research Center
Corporate Contributors:

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

FHWA/LA.24/685
Resource Type:

Tech Report
Geographical Coverage:

Louisiana ; United States
Edition:

Final Report June 2024
Corporate Publisher:

Louisiana Transportation Research Center
Abstract:

The growing use of recycled asphalt materials in asphalt pavement poses durability concerns due to the replacement of virgin asphalt binder with recycled binder. The current volumetric-based Superpave mixture design is insufficient in addressing these concerns. To supplement conventional volumetric design, performance-based testing was introduced to assess the cracking performance of asphalt mixtures. The Louisiana DOTD Specifications for Roads and Bridges recommend using the critical strain energy release rate, Jc, obtained from the semi-circular bend (SCB) test, as a complement to evaluate the cracking resistance of asphalt mixtures. However, the requirement of long-term aging (LTA) for SCB samples at 85°C for 5 days is time-consuming for quality control/assurance (QC/QA) practices. Therefore, estimating SCB Jc for long-term aged asphalt mixtures based on unaged asphalt binder and mixture properties is beneficial. The objective of this study was to develop practical methods to predict SCB Jc of LTA asphalt mixtures for use in QC/QA programs. Fourteen field asphalt mixtures from throughout Louisiana were selected for this study.
Format:

PDF
Funding:

19-4B SIO ; DOTLT1000321
Download URL:

https://rosap.ntl.bts.gov/view/dot/75660/dot_75660_DS1.pdf
File Type:

[PDF - 3.33 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:85dc4be62f091867669581ccfd1e954856344b2016f7145f60e63d0a09c6e31f66245acf5a3809f24331bad2444c94557d0cbdc02a8ddc31680c374f40dd76e6

File Language:

English

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