Impact of Mechanical Chemically Activated Rubber on Strain and Flow Behaviour of CRmB Binders

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00231943" target="_blank" >RIV/68407700:21110/15:00231943 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Impact of Mechanical Chemically Activated Rubber on Strain and Flow Behaviour of CRmB Binders

Popis výsledku v původním jazyce

One of the progressive trends which have been developed intensively in the last few years in road structures engineering are technical possibilities for optimal utilization of recycled rubber coming from old tires in asphalt mixtures and bituminous binders. In this connection there exist already several techniques, but at the same time, the knowledge about alterations in strain behavior of bitumen if modified by crumb rubber is still insufficient. Furthermore, the problem of heterogeneity of final composite binder is well known and not qualified completely. Experimentally, the focus is therefore oriented on possible use of so called mechanical chemically activated micro-milled rubber gained by the disintegration process. The paper summarizes experimentally made modifications with use of milled and micro-milled waste rubber together with application of further chemical additives, like polyphosphoric acid, which improve the stability of binder composite structure. Alteration in strain behavior and in dynamic viscosity values are assessed by means of rheological testing of bituminous binders which have not been aged o degraded. In this study, oscillatory measurements of strain characteristics (complex shear modulus in terms of temperature or frequency sweeps) have been done in temperature range 20-70°C and in a wider frequency interval, simulating various traffic loading effects. Measurements are executed strictly in linear area of viscoelastic behavior of this material. Simultaneously, multi-creep stress recovery test with determination of characteristics describing compliance were performed. Last but not least, flow curves describing the level of workability of designed modified bituminous binders are compared and analyzed by application of rotational viscosimetry. Recommendations for further use of bitumen modification by pulverized rubber are given including potentials in increased strain resistance.

Název v anglickém jazyce

Impact of Mechanical Chemically Activated Rubber on Strain and Flow Behaviour of CRmB Binders

Popis výsledku anglicky

One of the progressive trends which have been developed intensively in the last few years in road structures engineering are technical possibilities for optimal utilization of recycled rubber coming from old tires in asphalt mixtures and bituminous binders. In this connection there exist already several techniques, but at the same time, the knowledge about alterations in strain behavior of bitumen if modified by crumb rubber is still insufficient. Furthermore, the problem of heterogeneity of final composite binder is well known and not qualified completely. Experimentally, the focus is therefore oriented on possible use of so called mechanical chemically activated micro-milled rubber gained by the disintegration process. The paper summarizes experimentally made modifications with use of milled and micro-milled waste rubber together with application of further chemical additives, like polyphosphoric acid, which improve the stability of binder composite structure. Alteration in strain behavior and in dynamic viscosity values are assessed by means of rheological testing of bituminous binders which have not been aged o degraded. In this study, oscillatory measurements of strain characteristics (complex shear modulus in terms of temperature or frequency sweeps) have been done in temperature range 20-70°C and in a wider frequency interval, simulating various traffic loading effects. Measurements are executed strictly in linear area of viscoelastic behavior of this material. Simultaneously, multi-creep stress recovery test with determination of characteristics describing compliance were performed. Last but not least, flow curves describing the level of workability of designed modified bituminous binders are compared and analyzed by application of rotational viscosimetry. Recommendations for further use of bitumen modification by pulverized rubber are given including potentials in increased strain resistance.

Druh

D - Stať ve sborníku

CEP obor

JI - Kompositní materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/TA02030639" target="_blank" >TA02030639: Trvanlivé akustické asfaltové vrstvy s uplatněním výkonových asfaltových pojiv modifikovaných mikrogranulátem pryže včetně inovativní technologie jejího mletí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the international students scientific conference RISEM 2015 - Research and Inovation of Secondary Materials with Focus on Civil Engineering

ISBN

978-80-01-05813-8

ISSN

—

e-ISSN

—

Počet stran výsledku

10

Strana od-do

103-112

Název nakladatele

Czech Technical University in Prague

Místo vydání

Praha

Místo konání akce

Prague

Datum konání akce

23. 9. 2015

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—