Impact of laboratory ageing on properties of warm mix asphalt with high reclaimed asphalt content

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00326479" target="_blank" >RIV/68407700:21110/19:00326479 - 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

Impact of laboratory ageing on properties of warm mix asphalt with high reclaimed asphalt content

Popis výsledku v původním jazyce

Lately there are various environmental trends permeating into road constructions. Use of reclaimed materials, lowering the manufacturing and compaction temperature, elimination of emissions, etc. This study presents 13 different warm mix asphalt variants with up to 50 % reclaimed asphalt (RA). The compared asphalt mixtures differed in amount of used RA (0%, 30% and 50%), in the gradation of used paving grade bitumen (50/70 or 70/100) and in applied warm mix asphalt additives or used techniques. Used additives were based on silanes and on different types of waxes (FT paraffin, amide wax, PE wax). Additionally foamed bitumen technology was applied as well. The asphalt mixtures were sampled during the trial section paving. The asphalt mixtures were compacted by impact compactor (according to EN 12697-33) and alternatively by gyratory compactor (EN 12697-30). The specimens were tested and then subjected to artificial laboratory ageing according to prEN 12697-52. The test specimens were stored in the oven with constant circulation of air at temperature of 85 °C for 5 days. Additionally another set of specimens was prepared and subjected to ageing at 85 °C for 10 days. The test results for virgin, 5 days aged and 10 days aged specimens were compared to evaluate the influence of additives on ageing of the asphalt mixture. Determined tests were stiffness modulus, resistance to crack propagation (SCB test) and flexural strength.

Název v anglickém jazyce

Impact of laboratory ageing on properties of warm mix asphalt with high reclaimed asphalt content

Popis výsledku anglicky

Lately there are various environmental trends permeating into road constructions. Use of reclaimed materials, lowering the manufacturing and compaction temperature, elimination of emissions, etc. This study presents 13 different warm mix asphalt variants with up to 50 % reclaimed asphalt (RA). The compared asphalt mixtures differed in amount of used RA (0%, 30% and 50%), in the gradation of used paving grade bitumen (50/70 or 70/100) and in applied warm mix asphalt additives or used techniques. Used additives were based on silanes and on different types of waxes (FT paraffin, amide wax, PE wax). Additionally foamed bitumen technology was applied as well. The asphalt mixtures were sampled during the trial section paving. The asphalt mixtures were compacted by impact compactor (according to EN 12697-33) and alternatively by gyratory compactor (EN 12697-30). The specimens were tested and then subjected to artificial laboratory ageing according to prEN 12697-52. The test specimens were stored in the oven with constant circulation of air at temperature of 85 °C for 5 days. Additionally another set of specimens was prepared and subjected to ageing at 85 °C for 10 days. The test results for virgin, 5 days aged and 10 days aged specimens were compared to evaluate the influence of additives on ageing of the asphalt mixture. Determined tests were stiffness modulus, resistance to crack propagation (SCB test) and flexural strength.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

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

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

10th Malaysian Road Conference & Exhibition 2018

ISBN

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ISSN

1757-899X

e-ISSN

1757-899X

Počet stran výsledku

10

Strana od-do

1-10

Název nakladatele

IOP Publishing

Místo vydání

London

Místo konání akce

Kuala Lumpur

Datum konání akce

29. 10. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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