01519292

Component

The Vialit Cohesion Pendulum has been used for many years in Europe as a tool for assessing modified binders with a particular emphasis on chip seals/surfacing dressing applications. The cohesion measured in this device has been considered as an indicator of quality of the base bitumen and subsequent polymer formulation. This test demonstrates a transition between brittle and ductile failure of binder systems. When a test of this kind is compared to other binder tests it is possible to deduce the impact that high rate of loading has on the test results. Data will be presented from a series of tests conducted on SHRP core asphalts and these will be compared to direct tension tests and master curves developed with the same binders. A discussion will follow on how the fracture of asphalt binder and mixture is both rate and temperature dependent and that this parameter always needs that consideration to truly evaluate the meaning of test data. A test of this nature, while founded partly on an empirical data base of use can be better explained and understood with the consideration of speed of loading and temperature effects this allowing translation of fracture temperatures at one condition to those at another.

This paper was sponsored by TRB committee AFK20 Characteristics of Asphalt Materials. Alternate title: Cohesion, Fracture, and Vialit Cohesion Pendulum as a Tool for Asphalt Binder Evaluation.

01503729

14-2871

English

16p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; Photos; References

Asphalt mixtures; Binders; Bitumen; Empirical methods; Fracture mechanics; Temperature; Tension tests

Vialit test

Europe

Highways; Materials; I31: Bituminous Binders and Materials

Transportation Research Board Annual Meeting 2014 Paper #14-2871

TRIS, TRB, ATRI

Jan 27 2014 2:59PM