Fatigue Life Of Asphalt Concrete With Rubber Grains
Free (open access)
A. D’Andrea & N. Fiore
Fatigue life of asphalt concrete with rubber grains A. D' Andrea, N. Fiore Department of Hydraulics, Transportation and Roads, "La Sapienza " University of Rome, Italy Abstract This paper presents some results achieved in a wide research carried out in the road material laboratory of the Rome University "La Sapienza" to assess the suitability of a new hot mix asphalt (HMA), containing crumb rubber (particle size 2-5 mm), as sub-ballast in railways or base layer in road pavements. This material could be effective in the reduction of vehicular traffic vibrations; however, crumb rubber is responsible for reducing mechanical characteristics of the asphalt concrete. The aim of this step of the program here discussed is to evaluate the influence of kind and content of crumb rubber on bituminous mixes, regarding fatigue life. The experimental analysis was directed to detect the initial modulus value, above which this bituminous material will remain structurally serviceable for a considerable period.