AASHTO T 371-17 (2021) PDF Download

AASHTO T 371-17 (2021) is a standard method of testing that is specifically designed to measure the interfacial fracture energy (IFE) of hot-poured crack sealants. This test is conducted using the blister test technique. The purpose of this test is to evaluate the adhesive bond strength and the cohesive strength of the crack sealant when applied to asphalt pavement surfaces.

The standard specifies that the testing should be carried out at the application temperature specified in MP 25 and PP 85. The test procedure involves creating a blister on a cylindrical specimen of the crack sealant material. The blister is then inflated with air or another suitable medium. The test measures the force required to separate the blister from the substrate.

The results obtained from this test help in assessing the performance and durability of the crack sealant material. It is crucial to ensure strong adhesive properties of the crack sealant to prevent the ingress of water and other harmful substances into the pavement structure. This standard provides a reliable and standardized method for measuring the interfacial fracture energy of hot-poured crack sealants, enabling accurate evaluation and comparison of different materials and formulations.