Effect of miscellaneous methods of bitumen ageing and selected testing geometry used for Dynamic Shear Rheometer tests

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00300077" target="_blank" >RIV/68407700:21110/16:00300077 - 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

Effect of miscellaneous methods of bitumen ageing and selected testing geometry used for Dynamic Shear Rheometer tests

Original language description

During the production and paving of asphalt mixtures, the material is always heated. This accelerates the process of ageing of the bituminous binder. It is therefore necessary to pay attention to the characteristics of bituminous binders, not only for original but also after different stages of ageing. In order to simulate a short-term ageing, miscellaneous methods are used, such as RTFOT, TFOT or RFT and for long-term ageing PAV, RCAT or HiPAT test protocols. This paper is focused on the comparison of the performance characteristics measured on Dynamic Shear Rheometer (DSR) after ageing methods RTFOT, TFOT, PAV and their combinations. Characteristics affected by ageing were compared for three bituminous binders – standard straight-run bitumen of penetration 50/70 and two polymer modified bituminous binders (PMB). One of the performed DSR tests was a stress controlled oscillatory Frequency Sweep test with a mode of selected frequencies and temperatures. The measured values can be transformed to a master curve calculated for a reference temperature by applying the principle of time-temperature superposition. From master curves it is possible to assess the effects of strain behavior of each of the binders in a wide frequency range. The second test method performed on the DSR was Multiple Stress Creep Recovery test (MSCR) at higher operating temperatures, which in recent years has been promoted as the most appropriate method for assessing the resistance of bituminous binders to permanent deformation, especially for modified bituminous binders. This test method was performed with two different testing geometries (plate-plate 25 mm and 8 mm). The effect of the selected geometry on the measured values was compared, wherein for each geometry different gap for the bitumen sample is prescribed.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JM - Structural engineering

OECD FORD branch

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Project

<a href="/en/project/TE01020168" target="_blank" >TE01020168: Centre for Effective and Sustainable Transport Infrastructure (CESTI)</a><br>

Continuities

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

Publication year

2016

Confidentiality

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

Article name in the collection

Young Scientist 2016

ISBN

978-80-553-2537-8

ISSN

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e-ISSN

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Number of pages

10

Pages from-to

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Publisher name

TU Košice Fakulta Stavebná

Place of publication

Košice

Event location

Vysoké Tatry

Event date

Apr 14, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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