A quantitative method to characterize asphalts and modified asphalts using high pressure gel permeation chromatography

Miscellaneous · Fri Jan 01 00:00:00 EST 1988

OSTI ID:7071867

Price, R P

High pressure gel permeation chromatography (HP-GPC) is fast becoming a widely accepted tool in the characterization of asphalts. Phase I of this dissertation extended the research into specific characterization by HP-GPC of four AC-20 asphalts used for paving in South Carolina. Phase II used HP-GPC to characterize ten modified asphalts and a control AC-20. A method was introduced for quantifying HP-GPC by partitioning profiles into tenths based on elution time. Using the new technique, HP-GPC was statistically related to both asphalt cement and asphaltic concrete test results using linear regression models. Strong correlations with coefficients of determining between 0.75 and 0.99 and significance levels less than 10% were found in Phase I between the HP-GPC characterization and penetration, specific gravity, kinematic viscosity, thin film oven test (TFOT) loss, kinematic viscosity of TFOT residue, viscosity temperature susceptibility and penetration-viscosity number. In Phase II, strong correlations were obtained between HP-GPC and indirect tensile strength, resilient modulus, specific gravity, and resilient modulus-creep modulus ratio. Nine models were tested on the Phase II parent AC-20, different in source and crude origin than the asphalts from which the models were derived with seven of the nine models predicting results within 10% of the actual. Using the new analysis method developed in this research, HP-GPC characterization can be used to predict selected laboratory test results of asphalt cement and asphaltic concrete mixes.

• Research Organization: Clemson Univ., SC (USA)
• OSTI ID: 7071867
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ASPHALTS
CHEMICAL ANALYSIS
GEL PERMEATION CHROMATOGRAPHY
PERFORMANCE
CEMENTS
CONCRETES
CREEP
DENSITY
ORIGIN
PAVEMENTS
REGRESSION ANALYSIS
SOUTH CAROLINA
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
VISCOSITY
BITUMENS
BUILDING MATERIALS
CHROMATOGRAPHY
FEDERAL REGION IV
MATERIALS
MATHEMATICS
MECHANICAL PROPERTIES
NORTH AMERICA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
STATISTICS
TAR
USA
400102* - Chemical & Spectral Procedures