Publicación:
ASPHALT PYRO-REJUVENATORS BASED ON WASTE TYRES: AN APPROACH TO IMPROVE THE RHEOLOGICAL AND SELF-HEALING PROPERTIES OF AGED BINDERS

Vista sencilla de ítem
dc.creatorLUIS ERNESTO ARTEAGA PÉREZ
dc.creatorJOSÉ ERNESTO NORAMBUENA CONTRERAS
dc.date2024
dc.date.accessioned2025-01-10T15:52:49Z
dc.date.available2025-01-10T15:52:49Z
dc.date.issued2024
dc.description.abstractWASTE TYRES (WT) ARE A SIGNIFICANT FRACTION OF INDUSTRIAL WASTE AND A SOURCE OF ENVIRONMENTAL HAZARDS WITH LIMITED VALORISATION. TO REDUCE THIS PROBLEM, CURRENTLY THERE IS A GROWING INTEREST IN VALUING THE WT THROUGH PYROLYSIS TO OBTAIN MULTIFUNCTIONAL LIQUIDS TO IMPROVE THE RHEOLOGICAL AND SELF-HEALING PROPERTIES OF AGED BINDERS. THIS RESEARCH PROVIDES A COMPREHENSIVE STUDY ON USING WT MIXTURES AS PRECURSORS FOR ASPHALT REJUVENATORS BY MEANS OF PYROLYSIS AND DISTILLATION PROCESSES. TO THIS END, WT POLYMERIC FRACTIONS FROM LIGHT (WT-L) AND MINING TRUCKS (WT-M) WERE USED AS FEEDSTOCK AND CHARACTERISED FOR COMPOSITIONAL AND THERMAL PROPERTIES. ADDITIONALLY, MICROPYROLYSIS COUPLED WITH GAS CHROMATOGRAPHY/MASS SPECTROMETRY (PY-GC-MS) WAS USED TO IDENTIFY THE MAJOR PRODUCTS IN PYROLYSIS VAPOURS, TO ELUCIDATE THE REACTION MAPS DESCRIBING THERMAL DEGRADATION OF WTS AND TO PREDICT THE FEASIBLE REACTION CONDITIONS. THE PYROLYSIS LIQUIDS WERE PRODUCED AFTER A SCREENING OF REACTION CONDITIONS AND SUBJECTED TO DISTILLATION, FOLLOWING A RESPONSE SURFACE MODEL TO PRODUCE AN OPTIMISED PYROREJUVENATOR. THE RESULTS SHOWED THAT THE PYROLYTIC REJUVENATOR OBTAINED THROUGH PYROLYSIS AT 465 DEGREES C AND DISTILLATION CUTTING AT 160-200 DEGREES C IS MAINLY COMPOSED OF HYDROCARBONS AND AROMATIC SUBSTANCES (95.5%), WITH A SIGNIFICANT PROPORTION OF LIMONENE (33.71%). FURTHERMORE, THE PYROLYTIC REJUVENATOR EXHIBITED HIGHLY DESIRABLE PHYSICAL PROPERTIES IN THE CONTEXT OF ITS APPLICATION AND EXCELLENT OXIDATIVE STABILITY (85.7%). OTHERWISE, IT WAS DETERMINED THAT BITUMEN MIXTURES WITH 3%-6% DOSES OF PYRO-REJUVENATOR IMPROVED THE VISCOSITY, SOFTENING POINT, AND PENETRATION OF AGED BINDERS, RESTORING THEIR PHYSICAL PROPERTIES TO THE VIRGIN STATE. IN CONCLUSION, PYROREJUVENATORS CAN BE SUCCESSFULLY USED AS A PROMISING SOLUTION TO PRODUCE MORE DURABLE AND SUSTAINABLE PAVEMENTS WITH IMPROVED RHEOLOGICAL AND HEALING PROPERTIES.
dc.formatapplication/pdf
dc.identifier.doi10.1016/j.jclepro.2024.142179
dc.identifier.issn1879-1786
dc.identifier.issn0959-6526
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/14083
dc.languagespa
dc.publisherJOURNAL OF CLEANER PRODUCTION
dc.relation.uri10.1016/j.jclepro.2024.142179
dc.rightsPUBLICADA
dc.subjectWaste tyres
dc.subjectPyrolysis
dc.subjectDistillation
dc.subjectBitumen
dc.subjectAsphalt rejuvenator
dc.titleASPHALT PYRO-REJUVENATORS BASED ON WASTE TYRES: AN APPROACH TO IMPROVE THE RHEOLOGICAL AND SELF-HEALING PROPERTIES OF AGED BINDERS
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA EN MADERAS
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA CIVIL Y AMBIENTAL
ubb.SedeCONCEPCIÓN
ubb.SedeCONCEPCIÓN
Archivos
Colecciones
Artículos científicos