FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2997888532> ?p ?o ?g. }

• W2997888532 abstract "Polymer additives are widely used to improve the performances of road bitumens. However, although their advantages are well recognised, there are still drawbacks and concerns that limit the widening of their usage. One of these concerns is the lack of understanding of their ageing-inhibitor properties.This work focuses on the study of the effect of laboratory-simulated ageing on the microstructure and the rheological response of different polymer-modified bitumens (PMB). A single base bitumen has been modified with different concentrations of two polymers: an elastomer (Styrene-Butadiene-Styrene – SBS), and a plastomer (Ethyl-Vinyl Acetate – EVA). In the preparation of the SBS modified bitumens, the presence of sulphur as cross-linker has been varied to evaluate the effects of the use of cross-linker on their ageing resistance. The bitumens have been laboratory aged in the RTFO and the PAV. The microstructure of the unaged and aged bitumens has been investigated through fluorescence microscopy and Gel Permeation Chromatography (GPC). On the other hand, the rheological response has been investigated by linear viscoelastic characterisation, the Multiple Stress Creep and Recovery (MSCR) test, and the Linear Amplitude Sweep (LAS) test.The artificial ageing susceptibility of the SBS modified bitumens depends on the use of sulphur as cross-linker and the polymer concentration. More specifically, the SBS network degrades in the RTFO and the PAV. The degradation of the polymer phase is clearly visible in the fluorescence microscopy, and it is detected in the GPC. The deterioration of the polymer network contributes to mitigating the effects of the PAV-oxidative hardening of the bitumen phase on the rheological response. The use of cross-linker and the increase in the polymer concentration improve the ageing-inhibitor effect of the SBS.The EVA polymer shows a low ageing susceptibility and a low affinity with the base bitumen irrespective of the polymer concentration. As a consequence, the rheological response of aged EVA modified bitumens does not seem to show relevant deviations from one of the unmodified bitumens except for the cumulative damage resistance at high polymer concentration. Besides PMBs, this work includes a section focused on the laboratory–simulated ageing of SBS modified mastics. An unmodified bitumen and different SBS modified bitumens (i.e., different polymer concentrations) have been mixed with a single filler concentration. The mastics have been aged by using multiple cycles of PAV. The rheological response of the mastics has been investigated by the MSCR test. Results show that the variation with ageing of the resistance to the accumulation of permanent deformation of mastics shows a similar trend to one of the corresponding bitumens. The correspondence of the findings between the bitumen and mastic scales appears to be promising and support the approach followed in this work to study PMBs." @default.
• W2997888532 created "2020-01-10" @default.
• W2997888532 creator A5005041261 @default.
• W2997888532 date "2019-12-13" @default.
• W2997888532 modified "2023-09-23" @default.
• W2997888532 title "Study of the effect of laboratory-simulated ageing on the damage resistance of polymer-modified bitumens in intermediate climates" @default.
• W2997888532 hasPublicationYear "2019" @default.
• W2997888532 type Work @default.
• W2997888532 sameAs 2997888532 @default.
• W2997888532 citedByCount "0" @default.
• W2997888532 crossrefType "dissertation" @default.
• W2997888532 hasAuthorship W2997888532A5005041261 @default.
• W2997888532 hasConcept C15920480 @default.
• W2997888532 hasConcept C159985019 @default.
• W2997888532 hasConcept C186541917 @default.
• W2997888532 hasConcept C192562407 @default.
• W2997888532 hasConcept C200990466 @default.
• W2997888532 hasConcept C26771246 @default.
• W2997888532 hasConcept C2776093513 @default.
• W2997888532 hasConcept C2777566558 @default.
• W2997888532 hasConcept C38052585 @default.
• W2997888532 hasConcept C521977710 @default.
• W2997888532 hasConcept C63179538 @default.
• W2997888532 hasConcept C77017923 @default.
• W2997888532 hasConcept C87976508 @default.
• W2997888532 hasConceptScore W2997888532C15920480 @default.
• W2997888532 hasConceptScore W2997888532C159985019 @default.
• W2997888532 hasConceptScore W2997888532C186541917 @default.
• W2997888532 hasConceptScore W2997888532C192562407 @default.
• W2997888532 hasConceptScore W2997888532C200990466 @default.
• W2997888532 hasConceptScore W2997888532C26771246 @default.
• W2997888532 hasConceptScore W2997888532C2776093513 @default.
• W2997888532 hasConceptScore W2997888532C2777566558 @default.
• W2997888532 hasConceptScore W2997888532C38052585 @default.
• W2997888532 hasConceptScore W2997888532C521977710 @default.
• W2997888532 hasConceptScore W2997888532C63179538 @default.
• W2997888532 hasConceptScore W2997888532C77017923 @default.
• W2997888532 hasConceptScore W2997888532C87976508 @default.
• W2997888532 hasLocation W29978885321 @default.
• W2997888532 hasOpenAccess W2997888532 @default.
• W2997888532 hasPrimaryLocation W29978885321 @default.
• W2997888532 hasRelatedWork W158307302 @default.
• W2997888532 hasRelatedWork W161581944 @default.
• W2997888532 hasRelatedWork W1985511352 @default.
• W2997888532 hasRelatedWork W2015381923 @default.
• W2997888532 hasRelatedWork W2022346332 @default.
• W2997888532 hasRelatedWork W2052990369 @default.
• W2997888532 hasRelatedWork W2114930939 @default.
• W2997888532 hasRelatedWork W2129019569 @default.
• W2997888532 hasRelatedWork W2607147564 @default.
• W2997888532 hasRelatedWork W2738326996 @default.
• W2997888532 hasRelatedWork W2791923009 @default.
• W2997888532 hasRelatedWork W2894792124 @default.
• W2997888532 hasRelatedWork W2947373540 @default.
• W2997888532 hasRelatedWork W2976150172 @default.
• W2997888532 hasRelatedWork W2997911563 @default.
• W2997888532 hasRelatedWork W3083597829 @default.
• W2997888532 hasRelatedWork W3130680727 @default.
• W2997888532 hasRelatedWork W3194104157 @default.
• W2997888532 hasRelatedWork W604532877 @default.
• W2997888532 hasRelatedWork W800760634 @default.
• W2997888532 isParatext "false" @default.
• W2997888532 isRetracted "false" @default.
• W2997888532 magId "2997888532" @default.
• W2997888532 workType "dissertation" @default.