Search results for "polymer-modified bitumen"

showing 3 items of 3 documents

Effect of ageing on the morphology and creep and recovery of polymer-modified bitumens

2018

Polymer additives are used to improve the properties of road bitumens including their oxidative resistance. However, their usage as anti-oxidative materials remains relatively unclear. This study aims to investigate the changes in the morphology and the rheological response of polymer modified bitumens used in road pavement construction caused by ageing. An elastomer (radial styrene butadiene styrene, SBS) and a plastomer (ethyl vinyl acetate, EVA) polymer were mixed with one base bitumen at three polymer concentrations. The bitumens were RTFO and PAV aged. The morphology of the bitumens was captured by fluorescence microscopy while the rheological properties were measured by means of the m…

MorphologyStyrene-butadieneMaterials sciencePercent recovery0211 other engineering and technologies02 engineering and technologyElastomerPlastomerchemistry.chemical_compoundRheology021105 building & constructionSettore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials ScienceComposite materialPolymer-modified bitumenCivil and Structural Engineeringchemistry.chemical_classificationMSCRBuilding and ConstructionPolymer021001 nanoscience & nanotechnologyAgeingchemistryCreepMechanics of MaterialsAsphaltHardening (metallurgy)Polymer-modified bitumen Ageing Morphology Percent recovery MSCR0210 nano-technology
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Influence of short-term aging on mechanical properties and morphology of polymer-modified bitumen with recycled plastics from waste materials

2020

Polymer-modified bitumen (PMB) is bitumen that has been specifically engineered with polymer for providing enhanced performance in service. The aging of bitumen is a main aspect that is able to affect its final performance: during the production phase in a hot mix plant, all the binders experience short-term aging due to the high processing temperature. The same is true during the production of the modified binder, when the polymer is dispersed at high temperature in the bitumen mass. This paper aims at studying the effect of short-term aging when using different types of modifiers such as recycled polymers obtained from waste materials. A 50/70 penetration-grade bitumen has been modified, …

Materials scienceMorphology (linguistics)Polymers and Plastics0211 other engineering and technologiespolymer-modified bitumen02 engineering and technologymechanical propertiesArticlelcsh:QD241-441Viscositylcsh:Organic chemistryPhase (matter)021105 building & constructionmorphologyComposite materialElastic moduluschemistry.chemical_classificationPolymer modifiedGeneral ChemistryPolymer021001 nanoscience & nanotechnologyproduction temperatureCharacterization (materials science)waste polymersMechanical properties Microscopy Morphology Polymer-modified bitumen Production temperature Short term aging Waste polymerschemistryAsphaltmicroscopyshort term aging0210 nano-technology
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Microstructure and rheological response of laboratory-aged SBS-modified bitumens

2019

Polymer additives are widely used to improve the performance of road bitumens including their resistance to hardening during oxidation, although their oxidative inhibitor effect has not been well documented. This study aims to investigate the effect of laboratory-simulated ageing on the microstructure, and rheological properties of Polymer Modified Bitumens (PMBs) prepared with a Styrene-Butadiene-Styrene (SBS) copolymer and sulphur as a cross-linker. The laboratory ageing was conducted through the Rolling Thin Film Oven (RTFO) and the Pressure Aging Vessel (PAV) procedures. The unaged and aged binders were characterised using the Multiple Stress Creep and Recovery (MSCR) test, Gel Permeati…

chemistry.chemical_classification050210 logistics & transportationPolymer-modified bitumen SBS ageing GPC percent recovery sulphur MSCR.Materials sciencePercent recovery05 social sciences0211 other engineering and technologiesMSCRmacromolecular substances02 engineering and technologyPolymerMicrostructureAgeingSulphurchemistryRheologyGPC021105 building & construction0502 economics and businessHardening (metallurgy)Polymer-modified bitumenComposite materialageing; GPC; MSCR; percent recovery; polymer-modified bitumen; SBS; sulphurSBSCivil and Structural Engineering
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