ASPHALT PAVEMENT RECYCLING WITH REGIONAL MATERIAL ANDADDITIONOF PORTLAND CEMENT CPII-Z40

Abstract

Asphalt pavement recycling in the Amazon region emerges as a sustainable alternative by reusing existing materials and reducing environmental impacts. However, the humid climate and local logistical challenges pose difficulties for implementation. To overcome these issues, the cold in-place deep recycling method was adopted, minimizing material transport and environmental impact. At the Coari/AM Aerodrome, this technique was applied with the addition of Portland cement CPII-Z40. Initially, 3% cement was planned, but laboratory tests led to an increase to 4% to ensure strength and durability. The study followed the guidelines of DNIT Specification 167/2013-ES, with stages of soil-asphalt mixture characterization, specimen preparation, and performance analysis. The results showed an adequate gradation distribution, an optimum moisture content of 7.6%, and a maximum dry unit weight of 1.835 g/cm³. The technique proved effective and viable as a structural rehabilitation solution for flexible pavements in the region.

DOI: https://doi.org/10.56238/edimpacto2025.063-010