The thermal behavior of asphalt depends on the properties of individual molecules and on the interactions among molecules. Using thermal analysis to test discrete asphalt components (see Separation Science), WRI is determining how molecular types and associations contribute to the thermal properties of asphalts and to asphalt purchase specifications and field performance.
WRI uses modulated differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) to monitor changes in heat and mass flow, respectively, while thermally stressing asphalts and asphalt components.
Typical Measurements and Analyses Conducted By WRI
|Differential Scanning Calorimetry (DSC)||Thermogravimetric Analysis (TGA)|
|Glass transition temperature, height, and width||Weight loss profiles|
|Specific heat capacity||Pyrolysis kinetics|
|Crystalline content||Contaminant detection|
|Cloud point||Modifier detection|
|Relaxation kinetics||Oxidation kinetics|
|Polymer detection|| |