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Accession Number PB2013-110560
Title Evaluation of New Binders Using Newly Developed Fracture Energy Test.
Publication Date Jul 2013
Media Count 47p
Personal Author C. Cocconcelli G. Lopp R. Roque Y. Yan
Abstract This study evaluated a total of seven asphalt binders with various additives using the newly developed binder fracture energy test. The researchers prepared and tested PAV-aged and RTFO-plus-PAV-aged specimens. This study confirmed previous research findings that fracture energy is unaffected by loading rates. This research outlines the characteristics of true stress-true strain curves for asphalt binders with various additives. The results indicate that SBS polymer-modified asphalt binder exhibits a true stress-true strain curve with a distinct second stress peak at all loading rates, and has high fracture energy. Four binders exhibited comparable fracture energy with and without RTFO testing, while the fracture energy of other three increased significantly after RTFO testing. Limited information is available regarding the additives in the tested binders and their relative contents; however, the BFE test appears to clearly identify the presence of SBS polymer modifier and rank the cracking resistance of tested binders in terms of fracture energy. The BFE test successfully identified three binders which failed to meet the Superpave PG 76-22 grading requirements and clearly distinguished between the remaining four qualified binders.
Keywords Additives
Asphalt binders
Cracking
Evaluation
Fracture energy tests
Load analysis
Polymer modified binders
Strains
Stresses
Superpave


 
Source Agency Department of Transportation Office of University Research
NTIS Subject Category 50C - Construction Equipment, Materials, & Supplies
50A - Highway Engineering
Corporate Author Florida Univ., Gainesville. Dept. of Civil and Coastal Engineering.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1325
Contract Number BDK75-977-75

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