Abstract
The present research deals with the influence of fine Crumb Rubber (CR) incorporation on the mechanical and performance characteristics of dense graded asphalt mixtures including 30% Reclaimed Asphalt Pavements (RAP) by means of both laboratory-scale and in situ tests. In the laboratory phase, the mixtures were evaluated in terms of Indirect Tensile Strength (ITS), moisture sensitivity, Indirect Tensile Stiffness Modulus (ITSM) and Repeated Load Axial Test (RLAT). Experimental tests indicated that while the difference of RLAT results were insignificant, the ITS values and the ITSM modulus changed in an effective way. On the other hand, the in-situ investigations on texture by means of sand patch and British pendulum provided testimonies to the effectiveness of CR in recycled dense graded mixtures. Finally, the tire/pavement noise emission measurements of the trial sections by means of Close Proximity (CPX) showed no significant difference between the tested pavements with and without rubber.
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