Petrochemicals | Measuring Asphalt Binders according to ASTM D4402 and AASHTO T316-11 with RheolabQC
This report shows how the measurement of asphalt binders, bitumen and asphalts can be performed according to ASTM D4402 and AASHTO T316-11 with the rotational rheometer RheolabQC.
Knowledge of the viscosity of asphalt binders and bitumen at manufacturing and construction temperatures is very important as this will give information about:
- Pumpability: The ability to be pumped between (e.g.) storage containers or tanks and the manufacturing plant.
- Mixability: The ability to be properly mixed with additives, fillers and other components during the manufacturing process.
- Workability: The ability of the resulting Hot Mix Asphalt (HMA) to be placed and compacted with reasonable effort.
ASTM D4402 and AASHTO T316-11 describe the procedure for measuring the apparent viscosity of asphalt binders, bitumen and asphalt at elevated temperatures using a rotational rheometer equipped with a temperature device for maintaining the test temperature. Both norms are closely related (for more information see e.g. ASTM D6373 “Standard Specification for Performance Graded Asphalt Binder”) and can be measured with the same type of measurement on RheolabQC.
Experimental Setup
All measurements were performed with an Anton Paar RheolabQC rheometer equipped with the Peltier temperature device C-PTD 180/AIR/QC and a disposable concentric cylinder measuring system CC27 according to ISO 3219. The norm describes the construction of the cylinder geometry and defines the ratio of measuring cup diameter to measuring bob diameter as 1.0847. This guarantees an industrial standard for shearing the sample homogeneously in the measuring gap, independent of the measuring system size and manufacturer.
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