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Journal ArticleDOI

Evaluation of fatigue criteria for asphalt binders

TLDR
In this paper, a time sweep using the dynamic shear rheometer (DSR) has been proposed as an alternative test method for developing load-associated fatigue information for asphalt binders.
Abstract
The original SuperPave asphalt binder specification criterion for fatigue, G* sin δ, has received considerable criticism. Recently, a time sweep using the dynamic shear rheometer (DSR) has been proposed as an alternative test method for developing load-associated fatigue information for asphalt binders. This proposed test method is examined with respect to a phenomenon called edge fracture. Edge fracture is reported in the literature for steady state and oscillatory flow in DSR, but it has not been reported for asphalt binders. The modulus, when plotted versus number of cycles generated in a time sweep test, has the appearance typical of fatigue behavior; however, the actual response of the material depends markedly on the initial modulus of the material. The development of the modulus with repeated shearing is described with respect to flow of the asphalt binder at its circumference. The data are examined with respect to their validity as a measure of fatigue, and recommendations with respect to the use ...

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Journal ArticleDOI

Design, Construction, and In-Service Causes of Premature Pavement Deterioration: A Fuzzy Delphi Application

TL;DR: A windshield survey, literature survey, and fuzzy Delphi study were undertaken as complementary approaches to costly conventional investigations to identify reasons for flexible pavement deterioration in the design, construction, and life span phases as mentioned in this paper .
Journal ArticleDOI

Effect of Steric Hardening on the Damage Recovery of Bitumen

TL;DR: In this article , a multistage procedure was employed to separate the effect of steric hardening from the healing effect, and a storage recuperation test was carried out to quantify the combined effect of self-healing and steric hardness.
Journal ArticleDOI

Aplicação de parâmetro de resistência à fadiga para ligantes asfálticos baseado na mecânica da fratura elástico-linear

TL;DR: In this article, an approach based on the Linear Elastic Fracture Mechanics (LEFM) showed to be effective to analyze the data of the LAS test, also for the cases in which it was not possible to determine the a f index.
Book Chapter

Deriving and Characterising Alternative Bitumen from Waste Plastics

TL;DR: In this paper, an alternative bitumen using municipal waste polyethene (LDPE) and polypropylene (PP) was used as bitumen extender. And the performance of the modified bitumen with two nominated plastic waste (A1 and A2) was examined using the Dynamic Shear Rheometer (DSR) device by conducting frequency sweep tests.
References
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Journal ArticleDOI

Instabilities in viscoelastic flows

TL;DR: In this article, the authors present a review of the latest developments as well as earlier work in this area, organized into the following categories: Taylor-Couette flows, instabilities in cone and plate-and-plate flows, parallel shear flows, extrudate distortions and fracture, Instabilities in shear flow with interfaces, extensional flows, and thermohydrodynamic instabilities.
Journal ArticleDOI

Energy-Derived, Damage-Based Failure Criterion for Fatigue Testing:

TL;DR: In this paper, a method is presented for examining dissipated energy to select a consistent level of material behavior that is indicative of the damage accumulation in the mixture, showing the similarity between the constant stress and constant strain modes of testing and providing the potential for unifying the now phenomenological description of fatigue.
Journal ArticleDOI

Edge fracture in cone-plate and parallel plate flows

TL;DR: In this article, a study of the theoretical, experimental and computational aspects of edge fracture in second-order liquids is undertaken, which is approximately extended to cover the Criminale-Ericksen-Filbey (CEF) model.
Journal ArticleDOI

Anomalies in the normal force measurement when using a force rebalance transducer

TL;DR: In this paper, it was determined that the active nature of the transducer, which leads to excellent zero stability, causes thermal heating and consequent expansion of the system, and that the transducers length changes are the cause of the normal force anomalies.
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