Valorization of Asphalt Rubber Fine Powder in Road Field

Abstract

In the framework of valorization of the worn tires and environment preservation, several techniques exist in many fields. In Algeria, and since 2005, about 19 facilities are carried out using the so-called `Pneusol' technique. Currently, researches are interested in the use of rubber fine powder (RFP) that results from worn tires crushing. The letters constitute a cumbersome waste.[1,2] The present work presents, beginning from an experimental investigation, the possible using of tire scrap in road coating. The main purpose of such mixture is to improve certain mechanical properties, and also to reduce waste materials in the urban or agricultural zones leading to environmental and human damage. The mean study approach refers to the behavior of asphaltic concrete containing fine powders. The latter is produced by crushing of rubbery products and worn-out tires through dry and wet processes. Changes in rheological laws and in mechanical properties of the bituminous powder mixture are checked by means of experiments. The present study highlights the influence of fine powder content, size distribution and mixing conditions on some product properties such as deformation modulus, compactness and creep. The experimental results of the whole survey lead to interesting correlations. In addition, the rubber fine powder (RFP) is recognized taking into account road and environment interests. This appears to be, economically, interesting.