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The generation and management of industrial solid waste is considered an environmental problem worldwide. Reason why, several studies have focused on the implementation of Construction and Demolition Waste (RCD) for pavement layers, focusing mainly on the use of Concrete Recycled Aggregates (RCA). The objective of this study was to determine the impact of the implementation of the RCA in hot asphalt mixture on its physical-mechanical properties, under three scenarios: i) replacement of the coarse fraction, ii) fine and iii) 100% of the aggregate granulometry conventional (AC). The monotonic load resistance of the mixtures (Marshall and Indirect Traction - IT tests) and the wear resistance Cántabro were evaluated. The substitution of the fine fraction of AC by RCA significantly reduces the resistance under monotonic load of the control mixture. When replacing the coarse fraction, the design criteria of the control asphalt mixture are met and the IT is increased, but it is necessary to slightly increase the asphalt content. By replacing all the aggregates with RCA, a satisfactory behavior was obtained in the face of the action of monotonic charges, but it is also necessary to significantly increase the asphalt content. An increase in RCA in the mixture increases the loss from Cántabro wear. [ABSTRACT FROM AUTHOR]

Two grades of paving asphalt, AC 80-100 and AC 60-70, were studied to determine changes in their physical and chemical properties caused by exposure to water. This experimental study’s primary hypothesis is that the interaction between the water oxygen molecules and asphalt, known as oxidation, changes the asphalt properties, resulting in increased damage from mechanisms such as humidity and aging for mixtures in service. The chemical responses of both asphalts were measured, and the flow activation energy concept was used to understand the resulting changes in the physical and rheological properties after immersion in distilled water for one year. [ABSTRACT FROM AUTHOR]