Laboratory evaluation of combined effect of jute fibres and rejuvenators on some performance characteristics of asphalt mixture containing reclaimed asphalt

• Autorzy: Gallo Peter , Belhaj Majda , Valentin Jan , Vackova Pavla

Identyfikatory

DOI

10.7409/rabdim.023.022

Warianty tytułu

PL

Laboratoryjna ocena łącznego wpływu włókien jutowych i środków odświeżających (rejuvenatorów) na niektóre właściwości użytkowe mieszanki mineralno-asfaltowej zawierającej destrukt asfaltowy

• Języki publikacji: EN PL

Abstrakty

EN

The use of reclaimed asphalt (RA) in asphalt concrete mixtures have achieved economic and environmental benefits and it is important when we want to get in line with sustainable development and circular economy. This paper aims to evaluate the effectiveness of the addition of two bio-based rejuvenators and jute fibres on the performance of asphalt mixture designed with 30% by mass RA content. Seven mix variants, varying with the addition of the rejuvenator and/or fibres, were analysed. Mechanical performance was evaluated through laboratory tests measuring moisture susceptibility (ITSR), stiffness modulus (IT-CY), resistance to crack propagation (SCB) and dynamic modulus (4PB-PR). Mixtures with jute fibres showed lower ITSR. In comparison with the reference mixture, a decrease in the stiffness modulus has been shown for mixtures with rejuvenators. Opposite trend was observed when fibres were added. Best performance in resistance to crack propagation and complex modulus was achieved by adding jute fibres with rejuvenator to the mixture.

PL

Zastosowanie destruktu asfaltowego (RA) w mieszankach betonu asfaltowego przynosi korzyści ekonomiczne i środowiskowe i jest ważne w dążeniu do stosowania zasad zrównoważonego rozwoju i gospodarki o obiegu zamkniętym. Celem niniejszej pracy jest ocena skuteczności dodatku dwóch środków odświeżających na bazie biologicznej i włókien jutowych na właściwości użytkowe mieszanki mineralno-asfaltowej zaprojektowanej z 30% udziałem destruktu asfaltowego według masy. Przeanalizowano siedem wariantów mieszanki, różniących się dodatkiem środka odświeżającego i/lub włókien. Właściwości mechaniczne zostały ocenione za pomocą testów laboratoryjnych mierzących podatność na wilgotność (ITSR), moduł sztywności (IT-CY), odporność na propagację pęknięć (SCB) i moduł dynamiczny (4PB-PR). Mieszanki z włóknami jutowymi wykazywały niższą podatność na wilgotność. W porównaniu z mieszanką referencyjną, w odniesieniu do mieszanek ze środkami odświeżającymi wykazano spadek modułu sztywności. Odwrotną tendencję zaobserwowano po dodaniu włókien. Najlepsze wyniki w zakresie odporności na propagację pęknięć i modułu zespolonego uzyskano poprzez dodanie do mieszanki włókien jutowych ze środkiem odświeżającym.

Słowa kluczowe

EN

reclaimed asphalt; fibres; rejuvenator; recycling; asphalt mixture

PL

destrukt asfaltowy; włókna; środek odświeżający; recykling; mieszanka asfaltowa

• Wydawca: Instytut Badawczy Dróg i Mostów
• Czasopismo: Roads and Bridges - Drogi i Mosty
• Rocznik: 2023
• Tom: Vol. 22, no. 4
• Strony: 399--412
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Gallo Peter

• Faculty of Civil Engineering, Czech Technical University, Prague, Czech Republic

• https://orcid.org/0000-0001-7794-2176

autor

Belhaj Majda

• Faculty of Civil Engineering, Czech Technical University, Prague, Czech Republic

• https://orcid.org/0000-0002-4706-4605

autor

Valentin Jan

• Faculty of Civil Engineering, Czech Technical University, Prague, Czech Republic

• https://orcid.org/0000-0001-9155-1921

autor

Vackova Pavla

• Faculty of Civil Engineering, Czech Technical University, Prague, Czech Republic

• https://orcid.org/0000-0003-4636-8356

Bibliografia

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Uwagi

An extended version of the article from the Conference ‟Modern Road Pavements – MRP’2023” – Recycling in road pavement structures co-edited by Martins Zaumanis and Marcin Gajewski, published in frame of the Ministry of Education and Science project No. RCN/SP/0569/2021/1.