Current practices for modification of paving asphalts

Journal Article · Tue Dec 31 04:00:00 EST 1996 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry

OSTI ID:430334

Bahia, H U; Perdomo, D ^[1]

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1. Asphalt Institute, Lexington, KY (United States)

The Superpave binder specification, AASHTO MP1, has introduced new concepts for selecting paving asphalt binders. The specification, in addition to using rheological and failure measurements that are more related to performance, is based on the idea that the criteria to maintain a satisfactory contribution of asphalt binders to the resistance of pavement failures remains the same but have to be satisfied at critical application temperatures. The test procedures require that the material be characterized within certain ranges of strains or stresses to ensure that material and geometric non-linearities are not confounded in the measurements. These new specification concepts have resulted in re-evaluation of asphalt modification by the majority of modified asphalt suppliers. The philosophy of asphalt modification is expected to change, following these new concepts, from a general improvement of quality to more focus on using modifiers based on the most critical need as defined by two factors: (1) The application temperature domain and (2) the type of distress to be remedied. The new specification requirements should result in a more effective use of modifiers as the amount and type of modifier will be directly related to the application environment and the engineering requirements.

• OSTI ID: 430334
• Report Number(s): CONF-960807--
• Journal Information: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 4 Vol. 41; ISSN 0569-3772; ISSN ACFPAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ASPHALTS
BINDERS
CHEMICAL COMPOSITION
CRACKS
FAILURES
HYDROCARBONS
MECHANICAL PROPERTIES
STRAINS
STRESSES