• AASHTO TP 141-22

AASHTO TP 141-22

Standard Method of Test for Determining the Indirect Tensile Nflex Factor to Assess the Cracking Resistance of Asphalt Mixtures

American Association of State Highway and Transportation Officials , 2022

Publisher: AASHTO

File Format: PDF

$43.00$86.00


This test method covers the determination of cracking resistance of asphalt mixtures using the indirect tensile (IDT) geometry at 25°C. The Toughness (area beneath the stress-estimated strain data) and Brittleness Slope (post peak stress-estimated strain rate) are used to calculate a parameter referred to as the Nflex factor, which may be a useful indicator of load-related cracking of asphalt pavement layers.

This procedure applies to test specimens having a nominal maximum aggregate size (NMAS) of 19 mm or less. Lab compacted specimens or field core specimens can be used.

AASHTO TP 141-22 History

AASHTO TP 141-22

AASHTO TP 141-22

$43.00 $86.00

AASHTO TP 141-20

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