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

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

JM - Inženýrské stavitelství

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020168" target="_blank" >TE01020168: Centrum pro efektivní a udržitelnou dopravní infrastrukturu (CESTI)</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Young Scientist 2016

ISBN

978-80-553-2537-8

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

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Název nakladatele

TU Košice Fakulta Stavebná

Místo vydání

Košice

Místo konání akce

Vysoké Tatry

Datum konání akce

14. 4. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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