Search results for "fragmentation [jet]"

showing 8 items of 8 documents

Cold recycling of reclaimed asphalt pavements

2018

Pavement engineers have in front of them multiple challenges linked to addressing issues related to social development and society’s expanding needs. One of the most substantial of these issues is perhaps how to effectively rehabilitate and/ or maintain the existing road network while preserving and sustaining limited natural resources. The re-usage of existing pavement materials to reconstruct/ rehabilitate our future pavements is the solution that is now more and more selected by the different road administrations around the world. However, upon closer inspection, one can find many areas and details, not negligible issues, that are simply extensions of HMA technology (i.e. mix design proc…

BSM – bitumen stabilized materialsRecycling Reclaimedasphalt Foambitumen Bituminous emulsion Cohesion test Fragmentation test BSM – bitumen stabilized materialsComputer scienceProcess (engineering)Materials Science (miscellaneous)Cohesion test0211 other engineering and technologies020101 civil engineering02 engineering and technologyBuilding and ConstructionFragmentation testMix designNatural resourceConstruction engineering0201 civil engineeringBituminous emulsionAsphalt021105 building & constructionBituminous emulsion; BSM – bitumen stabilized materials; Cohesion test; Foam bitumen; Fragmentation test; Reclaimed asphalt; Recycling; Civil and Structural Engineering; Building and Construction; Materials Science (miscellaneous)Foam bitumenRecyclingProtocol (object-oriented programming)Reclaimed asphaltCivil and Structural Engineering
researchProduct

Recommendation of RILEM TC237-SIB on cohesion test of recycled asphalt

2018

This recommendation describes how to evaluate the presence of potentially active bitumen in recycled asphalt (RA) materials through the cohesion test. The experimental protocol is designed according to the research performed by the RILEM Technical Committee 237-SIB ‘‘Testing and characterization of sustainable innovative bituminous materials and systems’’ with the purpose, to develop a new, simple and fast method for the characterization of RA while limiting the need for conventional rheological tests. The guidelines in this recommendation focus on the testing procedure including specimen preparation, data analysis and provide information on the preparation of a tests report.

Computer science0211 other engineering and technologiesRecycled asphalt02 engineering and technologyReclaimed Asphalt (RA)Construction engineering021105 building & construction0502 economics and businessRecycled asphalt cohesion testingSettore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials ScienceTechnical committeeCivil and Structural EngineeringProtocol (science)050210 logistics & transportation05 social sciencesBuilding and ConstructionLimitingBituminous materialstestingTest (assessment)cohesionMechanics of MaterialsAsphaltRound Robin Test (RRT)Cohesion (chemistry)Specimen preparationFragmentation Test
researchProduct

Connected Lands : new perspectives on Ecological Networks Planning

2017

The construction of an ecological network is a fairly complex operation, given that the components to be considered are strictly linked to the age-old problem of the relationship between man and the land, until now perhaps seen too much as a limiting relationship and not, as the use of this tool suggests, as a relationship to be safeguarded. It may represent the ideal way to reconcile human needs and the conservation of biodiversity for the sustainable management of land. This study on the ecological network represents a tool capable to contain habitat fragmentation trough a new perspective that integrates theoretical approaches and methods with planning models and experiences of local appl…

Ecological NetworkPianificazione territorialeAmbienteRete ecologicaNatural Protected AreasFrammentazione ambientaleUrban and Regional PlanningFragmentation EnvironmentalEnvironmentAree Naturali protetteSettore ICAR/21 - Urbanistica
researchProduct

Evaluation of interfacial stress transfer efficiency by coating fragmentation test

2007

Probabilistic model of coating fragmentation under uniaxial tensile loading is developed. Analytical expressions of the crack spacing evolution are obtained for small-strain and large-strain fragmentation regimes. The model is applied for coating and interface property identification of several thin brittle coating/polymer substrate systems. An estimate of the stress transfer length, derived from the fragmentation data, is found to correlate with the interfacial shear strength thus suggesting that both parameters reflect an intrinsic property related to the mechanical efficiency of coating/substrate interface.

Materials scienceInterfacial stressUniaxial tension02 engineering and technologyengineering.materialinterfacial shear strength01 natural sciencesBrittlenessCoatingFragmentation (mass spectrometry)0103 physical sciencesPolymer substrate[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process EngineeringGeneral Materials ScienceComposite materialInstrumentationfragmentation test010302 applied physicscoating021001 nanoscience & nanotechnologyInterfacial shearTransfer efficiencyMechanics of Materialsengineeringcohesive strength0210 nano-technologyMechanics of Materials
researchProduct

Recommendation of RILEM TC237-SIB on fragmentation test for recycled asphalt

2019

This recommendation describes how to characterize the reclaimed asphalt through the fragmentation test. The guidelines given hereafter are based on the results of a round robin test organized by the RILEM Technical Committee 237-SIB ‘‘Testing and characterization of sustainable innovative bituminous materials and systems’’ and provide information on the testing procedure, data analysis and indications for the preparation of a test report.

Reclaimed asphalt (RA)Round robin test (RRT)Computer science0211 other engineering and technologies02 engineering and technologyBuilding and ConstructionBituminous materialsFragmentation testCivil engineeringTest (assessment)Market fragmentationTest reportMechanics of MaterialsAsphalt021105 building & constructionFragmentation test; Reclaimed asphalt (RA); Round robin test (RRT)General Materials ScienceTechnical committeeRound robin testCivil and Structural Engineering
researchProduct

Estimation of interfacial fracture toughness based on progressive edge delamination of a thin transparent coating on a polymer substrate

2010

Evaluation of interfacial toughness of sub-micron-thickness layers deposited on a ductile substrate is a challenging task which has motivated different experimental approaches Fragmentation testing was used in the present study as a means of interface characterization of a silicon-nitride-coated polyimide substrate. During the test, after an initial rapid segmentation-cracking phase, the coating fragments developed edge delaminations which propagated in a stable manner with further increase in the applied strain The debonding process was modelled by the finite element method Incorporating a cohesive zone at the front of the interfacial crack The edge cracks were found to be dominated by mod…

ToughnessMaterials sciencePolymers and PlasticsTension testEfficiencyengineering.materialStressMechanicsFracture toughnessCoatingCoatingsPolymer substrateThin filmComposite materialFilmTensile testingDelaminationMetals and AlloysFinite element analysisCohesive-Zone ModelsForce MicroscopyElectronic Optical and Magnetic MaterialsCeramics and CompositesengineeringAdhesionToughnessLine StructuresFragmentation TestPolyimidePolyimide
researchProduct

Analysis of thin film cracking and buckling on compliant substrate by fragmentation test

2007

Application of coating fragmentation test for determination of coating properties is considered. A probabilistic model of coating fragmentation under uniaxial tensile loading is applied for coating and interface property identification of thin brittle coating/polymer substrate system. A finite element model is developed to simulate the process of buckle formation in coating strips during fragmentation test. The measured buckle geometry parameters and buckle density evolution as a function of the applied strain is used to estimate the interface toughness.

fragmentation testToughnessMaterials scienceMechanical Engineeringcoatingengineering.materialinterfacial shear strengthCrackingadhesionBrittlenessCoatingBucklingMechanics of MaterialsengineeringPolymer substrateGeneral Materials Sciencecohesive strengthThin filmComposite materialBuckle
researchProduct

Jet fragmentation transverse momentum distributions in pp and p-Pb collisions at √s, √sNN = 5.02 TeV

2021

Jet fragmentation transverse momentum (jT) distributions are measured in proton-proton (pp) and proton-lead (p-Pb) collisions at √sNN = 5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed with the ALICE tracking detectors and electromagnetic calorimeter using the anti-kT algorithm with resolution parameter R = 0.4 in the pseudorapidity range |η| < 0.25. The jT values are calculated for charged particles inside a fixed cone with a radius R = 0.4 around the reconstructed jet axis. The measured jT distributions are compared with a variety of parton-shower models. Herwig and Pythia 8 based models describe the data well for the higher jT region, while they underestimate the low…

related to the perturbative component of the fragmentation processthe measured trends are successfully described by all models except for Herwig. For the wide componentHerwig and PYTHIA 8 based models slightly underestimate the data for the higher jet transverse momentum region. These measurements set constraints on models of jet fragmentation and hadronisation.Nuclear and High Energy Physicswhile that of the inverse gamma function increases with increasing jet transverse momentum. For the narrow componentHeavy Ion Experimentsand with a Gaussian for lower jT values (called the “narrow component”)hiukkasfysiikkawhile they underestimate the lower jT region. The jT distributions are further characterised by fitting them with a function composed of an inverse gamma function for higher jT values (called the “wide component”)predominantly connected to the hadronisation process. The width of the Gaussian has only a weak dependence on jet transverse momentumJet fragmentation transverse momentum (jT) distributions are measured in proton-proton (pp) and proton-lead (p-Pb) collisions at √sNN = 5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed with the ALICE tracking detectors and electromagnetic calorimeter using the anti-kT algorithm with resolution parameter R = 0.4 in the pseudorapidity range |η| < 0.25. The jT values are calculated for charged particles inside a fixed cone with a radius R = 0.4 around the reconstructed jet axis. The measured jT distributions are compared with a variety of parton-shower models. Herwig and PYTHIA 8 based models describe the data well for the higher jT region
researchProduct