scope:

This test method applies to hot-poured asphalt crack sealant used in the construction and maintenance of roadways as specified in M 338 and R 116.

This test method is used to determine the resistance of hot-poured asphalt crack sealant to tracking and deformation at summer temperatures.

This test method covers the determination of flow and shear thinning propensity in hot-poured asphalt crack sealant with the use of a dynamic shear rheometer and by means of creep-recovery tests.

The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of R 18 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with R 18 alone does not completely assure reliable results. Reliable results depend on many factors; following the suggestions of R 18 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors.