Evaluation Of The Behavior Of Asphalt Mixtures Modified With Waste Tire Dust

Abstract

The addition of dust from out-of-use tires (NFU) in asphalt mixtures is a solution to reduce environmental pollution and increase durability compared to conventional asphalt mixtures. The main characteristics of modified mixtures are the prevention of cracking of the asphalt mixture, reducing maintenance time, in that sense the objective of this research is to design an asphalt mixture modified with NFU to evaluate its behavior compared to conventional mixtures. Laboratory samples corresponding to conventional mixtures and modified mixtures with the addition of 2% of NFU powder were analyzed applying the Marshall method by dry method, the results corresponding to RICE density, stability, flow, percentage of total voids (VM), voids of mineral aggregate (VAM) and voids filled with asphalt (VFA), gave different values ​​between both mixtures. The stability in both mixtures meets the design specifications of 2200 pounds, however, it presents a pattern of decrease as the asphalt content increases in the modified mixture