Design and evaluation of stone matrix asphalt using stiffer grade crumb rubber modified bitumen

• Autorzy: Kumar Gajendra , Sahoo Umesh C. , Ramachandra Rao K. , Bose Sunil

Identyfikatory

DOI

10.7409/rabdim.019.010

Warianty tytułu

PL

Projektowanie i ocena mieszanki mastyksowo-grysowej przy zastosowaniu asfaltu modyfikowanego dodatkiem granulatu gumowego o podwyższonym module sztywności

• Języki publikacji: EN PL

Abstrakty

EN

Stone Matrix Asphalt (SMA) is primarily used as a surfacing layer material since it is found to perform well under heavy traffic conditions and at the same time is more cost-effective when compared to the conventional dense graded mixes. An attempt has been made in this study to incorporate a stiffer grade crumb rubber modified bitumen (CRMB) for design of SMA. Extensive laboratory studies on mixes prepared with different modified binders and normal binders (with fibers) were conducted. The results obtained indicate that SMA designed using CRMB-70 and CRMB-80 performs well under heavy traffic conditions and at the same time without significant drain-down. Further, CRMB-80 is found to be suitable at high temperatures since it yields a very low accumulated strain and is thus recommended for designing rut resistant durable mixes. In addition, CRMB-80 yields the least rut depth of 4.5 mm even after 20,000 load repetitions.

PL

Mieszanki mastyksowo-grysowe znajdują zastosowanie przede wszystkim jako materiał do wykonywania warstwy ścieralnej nawierzchni drogowej ze względu na ich bardzo dobrą charakterystykę pracy w warunkach dużego obciążenia ruchem oraz jako korzystna cenowo alternatywa w stosunku do klasycznych mieszanek mineralno-asfaltowych o ciągłym uziarnieniu. Przedmiotem pracy jest zastosowanie w mieszankach SMA sztywniejszego lepiszcza modyfikowanego granulatem gumowym. Przeprowadzono szerokie badania laboratoryjne mieszanek z różnymi lepiszczami modyfikowanmi i niemodyfikowanymi (z dodatkiem włókien). Uzyskane wyniki wskazują na dobre właściwości eksploatacyjne mieszanek SMA na bazie lepiszczy CRMB-70 i CRMB-80 w warunkach dużych obciążeń ruchem bez znaczącego problemu ze spływnością lepiszcza. Potwierdzono również zasadność zastosowania lepiszcza CRMB-80 do nawierzchni o zwiększonych wymaganiach w zakresie odporności na wysokie wartości temperatury. Bardzo niskie wartości skumulowanych odkształceń predestynują ten materiał do produkcji mieszanek o wysokiej odporności na koleinowanie. Ponadto, w przypadku wykorzystania lepiszcza CRMB-80 uzyskano najmniejszą głębokość koleiny wynoszącą 4,5 mm po 20000 cyklach obciążenia.

Słowa kluczowe

EN

crumb rubber modified bitumen (CRMB); fiber; performance; stone matrix asphalt (SMA)

PL

lepiszcze modyfikowane granulatem gumowym (CRMB); mieszanka mastyksowo-grysowa (SMA); właściwości użytkowe; włókna

• Wydawca: Instytut Badawczy Dróg i Mostów
• Czasopismo: Roads and Bridges - Drogi i Mosty
• Rocznik: 2019
• Tom: Vol. 18, no. 2
• Strony: 151--165
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Kumar Gajendra

• Central Road Research Institute (CSIR), Flexible Pavements Division, New Delhi-110025, Indie

autor

Sahoo Umesh C.

• Indian Institute of Technology Bhubaneswar, School of Infrastructure, Odisha-752050, Indie

autor

Ramachandra Rao K.

• Indian Institute of Technology Delhi, Department of Civil Engineering, and Transportation Research and Injury Prevention Programme (TRIPP), New Delhi-110016, Indie

autor

Bose Sunil

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).