Publicación: PYROLYTIC OIL FROM WASTE TYRES AS A PROMISING ENCAPSULATED REJUVENATOR FOR THE EXTRINSIC SELF-HEALING OF BITUMINOUS MATERIALS
Fecha
2021
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Road Materials and Pavement Design
Resumen
EXTRINSIC SELF-HEALING OF BITUMINOUS MATERIALS USING ENCAPSULATED REJUVENATORS IS A HOT TOPIC WITHIN ROAD MATERIALS. BASED ON A CIRCULAR ECONOMY VISION FOR MORE SUSTAINABLE AND RESILIENT ASPHALT PAVEMENTS, THIS STUDY EXPLORES FOR THE FIRST TIME THE USE OF PYROLYTIC OIL FROM WASTE TYRES AS A PROMISING ENCAPSULATED REJUVENATOR TO PROMOTE THE EXTRINSIC SELF-HEALING IN BITUMINOUS MATERIALS. PYROLYTIC OIL-IN-WATER EMULSIONS, AND CAPSULES AND THEIR COMPONENTS WERE PRODUCED AND CHARACTERISED THROUGH GAS CHROMATOGRAPHY-MASS SPECTROMETRY (GC/MS) AND SARA FRACTIONS ANALYSIS, FLUORESCENCE MICROSCOPY METHODS, CREAMING INDEX, THERMOGRAVIMETRIC ANALYSIS (TGA-DGT), OPTICAL AND SCANNING ELECTRON MICROSCOPY (SEM), ENCAPSULATION EFFICIENCY AND MECHANICAL PROPERTIES. MAIN RESULTS SHOWED THAT THE PYROLYTIC OIL CAPSULES PRESENTED AN ADEQUATE MORPHOLOGY FOR THE SELF-HEALING ASPHALT, WITH A GOOD THERMAL STABILITY, PHYSICAL?CHEMICAL AND MECHANICAL PROPERTIES. OVERALL, IT WAS ALSO PROVEN THAT THE PYROLYTIC OIL IS A REJUVENATOR THAT CAN DIFFUSE IN THE AGED BITUMEN REDUCING ITS VISCOSITY TO PROMOTE THE SELF-HEALING OF THE MICROCRACKS.
