008_4-Years-of-Performance-of-A-Test-Track-Using-Crumb-Rubber-Asphalt-And-Other-Modifiers

4 Years of Performance of A Test Track Using Crumb Rubber Asphalt And Other Modifiers

Authors: Gilberto Martínez, Libardo Celis, Bernardo Caicedo, David Gonzáles

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Abstract

This paper presents the performance of 4 full-scale test section constructed with the aim of applying asphalt rubber technology in Colombia. This study reports the results of the performance of a test track constructed with one section using Crumb Rubber Modifier-CRM. The CRM was incorporated to the asphalt hot mix introducing the CRM as a bitumen modifier (wet process). Additionally the 4 full-scale test section were constructed with the
same pavement structure; one with conventional asphalt binder Barrancabermeja (Barranca) 80-100(80-100 penetration grade), two sections with modified asphalt binder, Styrene Butadiene Rubber-SBR, and Styrene Butadiene Styrene-SBS and one with asphalt rubber binder. The 4 mixtures were designed using a continuous grain size distribution. The track was submitted to loads produced by public transport vehicles, light and heavy vehicle. Thepaper reports the test track performance over 4 years, with measures of; deflections (FWD), Ground Penetration Radar(GPR) and distress survey. An analytical comparison is presented considering the structural capacity of each section of the test track, by using backcalculation analysis.

Additional Information

Year

2009

Pages

18