0000000000125431

AUTHOR

Claudia Fecarotti

showing 4 related works from this author

Toward more realistic viscosity measurements of tyre rubber–bitumen blends

2014

AbstractThe measurement of rheological properties of the tyre rubber bitumen blends is often challenging due to presence of suspended tyre rubber’s crumbs. Furthermore, the phase separation during the course of measurements makes the viscosity of these non-homogeneous blends difficult to ascertain. In this study, a new dual helical impeller was designed and manufactured to be used with a rotational viscometer in order to have a real-time control of the viscosity while performing a laboratory mixing of the blends. Layer based manufacturing techniques showed to be a convenient method to produce complex shaped impeller prototypes before manufacturing the more expensive stainless steel assembly…

Recycled tyre rubberEngineeringbituminous materials Calibration Electric discharges Impellers Manufacture Rapid prototyping Rate constants Real time control Rubber Stainless steel Tires Viscometers Viscosity Viscosity measurementViscometryMixing (process engineering)ViscosityImpellerMaterials Science(all)Natural rubberRheologyElectrical discharge machiningSettore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials ScienceComposite materialCivil and Structural EngineeringComplex fluidRapid prototypingbusiness.industryViscometerBuilding and ConstructionDual helical impellerShear rateRubberised bitumenvisual_artvisual_art.visual_art_mediumSettore ICAR/08 - Scienza Delle CostruzionibusinessConstruction and Building Materials
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Experimental validation of a fractional model for creep/recovery testing of asphalt mixtures

2012

Abstract Prediction of asphalt mixtures’ behavior during their service life is a challenge due to its complexity and sensitivity to environmental and loading conditions. It has been proved that, when subjected to loading conditions comparable with most pavement operating conditions, asphalt mixtures behave as linear visco-elastic (LVE) materials. Traditionally the LVE behavior of bituminous material is modeled via creep/recovery functions. In the past, several rheological models constituted by elastic and viscous elements arranged in series or in parallel (analogical models) have been proposed and specified for both bitumen and asphalt mixtures. The corresponding constitutive laws always in…

Materials sciencebusiness.industryBuilding and ConstructionStructural engineeringExponential typeExponential functionCreepRecovery testingRheologyAsphaltAsphalt Creep recovery testing Fractional model Experimental validationService lifeSettore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials ScienceSensitivity (control systems)businessCivil and Structural EngineeringConstruction and Building Materials
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An extension of the fractional model for construction of asphalt binder master curve

2015

Knowledge and prediction of viscoelastic behaviour of asphalt binder is of great interest in order to design asphalt mixtures for civil construction of road and airports with good performances. The capability of a fractional model – requiring a very limited number of parameters – to describe and predict the linear viscoelastic behaviour of asphalt binder subjected to sinusoidal oscillations is investigated. Experimental data of complex modulus, |G*|, and phase angle, δ, are used to validate the proposed constitutive model. Based on the proposed extension of a fractional model, complex modulus isotherms for a range of frequencies can be created simply starting from isochronals at frequency v…

Engineeringcomplex moduluEnvironmental Engineeringmaster curveConstitutive equation0211 other engineering and technologiesModulusMechanical engineeringValue (computer science)020101 civil engineering02 engineering and technologyViscoelasticity0201 civil engineeringfractional model021105 building & constructionRange (statistics)Applied mathematicsSettore ICAR/04 - Strade Ferrovie Ed AeroportiCivil and Structural Engineeringbusiness.industryasphalt binderPhase angleExtension (predicate logic)Asphaltroad pavementbusinessSettore ICAR/08 - Scienza Delle Costruzioni
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Linear ViscoElastic (LVE) Behaviour of Pure Bitumen via Fractional Model

2012

AbstractBy fitting experimental data from static creep/recovery carried out on pure bitumen, it is shown that the fractional model proposed enables the description of both creep and recovery behaviour with fewer parameters than those needed by other models in the literature. In particular, the model is fitted to experimental data of complex modulus |G*| and phase angle δ° obtained from Dynamic Mechanical Analysis. Lastly, it is demonstrated that when the fractional model is used, complex modulus isotherms for a range of frequencies can be created simply starting from isochronals at f = 1Hz.

complex modulubitumen.Materials scienceMathematical modelPhase angleThermodynamicsModulusDynamic mechanical analysisFractional modelViscoelasticityCreepAsphaltForensic engineeringRange (statistics)Settore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials ScienceCreep/recoverySettore ICAR/08 - Scienza Delle CostruzionibitumenComplex modulusProcedia - Social and Behavioral Sciences
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