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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JI - Composite materials

OECD FORD branch

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Project

<a href="/en/project/TA02030639" target="_blank" >TA02030639: Durable acoustic asphalt pavement courses with utilization of bituminous binders modified by rubber microfiller including innovative technology of rubber milling</a><br>

Continuities

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

Publication year

2015

Confidentiality

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

Article name in the collection

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

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e-ISSN

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Number of pages

10

Pages from-to

103-112

Publisher name

Czech Technical University in Prague

Place of publication

Praha

Event location

Prague

Event date

Sep 23, 2015

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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