01518312

Component

Durability and toughness of dense-graded asphalt (DGA) is a key issue with regards to long term pavement performance. There is a need for a practical and implementable test to estimate these parameters. Previous research has suggested that the Cantabro abrasion loss test has potential for this application. Both the development of the Cantabro method and its conventional application to open-graded friction course (OGFC) mixtures were reviewed. A four component research approach was undertaken to evaluate suitability of the Cantabro test for DGA mixtures that included testing of 438 specimens from 69 different mixtures. First, sensitivity of the test was assessed using a large range of typical Mississippi DGA mixtures. Second, variability of the test was measured by testing data sets with thirty replicates. Third, the effects of oven conditioning protocols were measured. Fourth, the effects of reclaimed asphalt pavement (RAP) contents were measured for warm-mix asphalt (WMA). The overall recommendation from the research was that the Cantabro test be given serious consideration for use as a durability or toughness measurement tool for DGA mixtures.

This paper was sponsored by TRB committee AFK10 General Issues in Asphalt Technology. Alternate title: Characterizing Dense-Graded Asphalt Concrete with Cantabro Test.

01503729

14-4013

English

19p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; Photos; References; Tables

Abrasion tests; Dense graded aggregates; Durability; Reclaimed asphalt pavements; Stripping (Pavements); Toughness; Warm mix paving mixtures

Dense graded asphalt mixtures

Mississippi

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

Transportation Research Board Annual Meeting 2014 Paper #14-4013

TRIS, TRB, ATRI

Jan 27 2014 3:23PM