Search results for " Permanent deformation"

showing 3 items of 3 documents

Laboratory and in-situ tests for estimating improvements in asphalt concrete with the addition of an LDPE and EVA polymeric compound

2019

Abstract Pavement deformation is a critical issue in the design of pavement structures and the related mixture. Asphalt concretes may be very sensitive to this problem, in compliance with the viscoelastic behaviour of the adopted bitumen. To improve the material performance, many attempts have been made to introduce in the mixture other materials as “modifiers” or “additives” for increasing the permanent deformation resistance and the elastic modulus of the material. Among the different possible materials, polymers determined significant improvements in the road pavement performance. In this paper, the authors tested the adoption of a specifically engineered polymeric compound, in order to …

Materials scienceModified asphalt concrete0211 other engineering and technologiesModulus020101 civil engineeringContext (language use)02 engineering and technologyViscoelasticity0201 civil engineering021105 building & constructionSettore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials ScienceComposite materialPermanent deformationElastic modulusCivil and Structural Engineeringbusiness.industryMix-design Modified asphalt concrete Permanent deformation Polymeric compound Polymeric compoundBuilding and ConstructionMix-designAsphalt concretePolymeric compoundLow-density polyethyleneAsphaltDeformation (engineering)business
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Performance improvements of asphalt mixtures by dry addition of polymeric additives

2017

This paper shows the results of an experimental study concerning the development and optimization of asphalt mixtures for binder and base courses, improved with specifically engineered additives. The focus was on the mechanical improvements of the mixtures as achievable via dry modification with polymeric additives by making use of aggregate and bitumen of average quality, as locally available, in order to limit the consumption of virgin materials. The results allowed interesting conclusions to be drawn about the use of polymeric additives for these mixtures. In particular, the modified mixtures proved to have better performance in terms of both permanent deformation resistance and stiffnes…

Settore ICAR/04 - Strade Ferrovie Ed AeroportiDry Polymeric addivites Permanent deformation Stiffness Fatigue cracking
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Repeated Load Triaxial Testing of Recycled Excavation Materials Blended with Recycled Phyllite Materials

2022

Recycled Excavation Materials (REM) are becoming viable alternative construction resources due to their economic benefits. However, REM may be composed of weak rocks, e.g., phyllites, limiting the use in a base layer. The present paper attempts to further the knowledge of the mechanical performance of REM by performing Repeated Load Triaxial Tests (RLTT). REM are mixed with Recycled Phyllite Materials (RPM) in systematic blends of 0%, 25%, 50%, and 100%. The batches’ resilient modulus (MR) and permanent deformation (PD) characteristics were assessed to establish the maximum RPM allowed into REM while maintaining the required performance. Hicks and Monismith’s and Uzan’s mo…

TechnologyMicroscopyQC120-168.85TQH201-278.5Engineering (General). Civil engineering (General)Article:Teknologi: 500 [VDP]TK1-9971recycled excavation materialsDescriptive and experimental mechanicsrecycled phyllite materialsRecycled excavation materialsresilient modulusRecycled phyllite materialspermanent deformationResilient modulusGeneral Materials ScienceElectrical engineering. Electronics. Nuclear engineeringTA1-2040VDP::Technology: 500::Materials science and engineering: 520Permanent deformationrecycled excavation materials; recycled phyllite materials; resilient modulus; permanent deformation
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