Evaluación de las propiedades mecánicas asfálticas modificadas con polvo de gres porcelánico en pavimentos flexibles reciclados

Abstract

The integration of recycled materials into asphalt mixtures is an innovative solution to reduce global pollution, seeking to provide benefits both in pavement quality and in improving the environment. It was divided into three phases, the first was based on identifying the site for the extraction of the materials. In the second, the materials were subjected to tests such as: granulometry, abrasion, rice test and Marshall method to analyze stability and flow properties. For the design, stoneware and RAP were added, plus the optimal asphalt content of 5.5, 6.0 and 6.5 percent. The porcelain stoneware partially replaced the fine aggregate when passing the No. 4 sieve and being retained in the No. 50, on the other hand, the RAP partially replaced the 3/8" intermediate aggregate when passing the 1/2" sieve and being retained in No. 4. Consequently, stoneware and RAP were partially incorporated with percentages of 7 stoneware – 10 RAP, 10 stoneware – 20 RAP and 13 stoneware – 30 RAP. Finally, in the third, a comparative analysis was carried out according to the Marshall criteria between the modified asphalt mixtures and the traditional mixture. These phases resulted in incorporating stoneware and RAP with percentages of 7 stoneware – 10 RAP, 10 stoneware – 20 RAP and 13 stoneware – 30 RAP, plus 6.5 percent asphalt, improving the mechanical properties of the mixture compared to the traditional mixture, concluding that the modified asphalt mixture surpasses the traditional one in terms of resistance, durability and environmental sustainability.