Effects of recycled asphalt pavements on the fatigue life of asphalt under different strain levels and loading frequencies

Mannan, Umme Amina; Islam, Rashadul; Tarefder, Rafiqul A.

doi:10.1016/j.ijfatigue.2015.04.004

Cited by 116 publications

(22 citation statements)

References 10 publications

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“…The other rankings were almost same as those of other parameters, apart from those obtained by the ITFT. Previous studies have reported that the G*sinδ is not an accurate indicator of asphalt mixtures' fatigue performance [28,29]. According to its mechanism, G*sinδ is a stiffness-based parameter.…”

Section: Discussionmentioning

confidence: 96%

Fatigue Resistance Characterization of Warm Asphalt Rubber by Multiple Approaches

Gao

et al. 2018

Applied Sciences

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Warm asphalt rubber (WAR) mixture is a sustainable paving material with advantages including waste recycling and noise reducing. A comprehensive understanding of the fatigue performance of WAR specimens is helpful to its wide application. However, research on evaluating the fatigue performance of WAR binder and mixtures is very limited. This paper applies five fatigue analysis approaches to evaluate the fatigue life of WAR samples with three different warm mix asphalt (WMA) additives. The conventional G*sinδ, linear amplitude sweep (LAS), indirect tensile fatigue test (ITFT), and four-point bending beam (4PB) test were conducted based on available standards. In addition, a novel shear fatigue test was performed on WAR mortars. Test results indicated that the incorporation of crumb rubber has a significantly positive effect on fatigue resistance. WAR with chemical and foaming additives exhibited a poorer performance than asphalt rubber (AR), but their fatigue performance was still greatly superior to the non-rubberized samples. Finally, LAS as well as mortar shear fatigue and 4PB tests provided the same prediction of fatigue resistance, while the results of G*sinδ and the ITFT were inconsistent. It is recommended to use LAS, the mortar shear fatigue test, and the 4PB test for the fatigue resistance evaluation of rubberized specimens. The validation of the findings with more materials and field performances is recommended.

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Section: Discussionmentioning

confidence: 96%

Fatigue Resistance Characterization of Warm Asphalt Rubber by Multiple Approaches

Gao

et al. 2018

Applied Sciences

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“…Geri dönüşüm yöntemi ile yol ve bina inşaatlarında daha önce kullanılmış olan agregaların tekrar BSK dizaynına bitümlü veya bitümsüz alarak belli oranlarda sokulması üzerinde son yıllarda en çok çalışılan konulardan birisidir [6][7][8]. Guo ve ark.…”

Section: şEkil 1 Saroz Körfezi'nde Taş Ocaklarının Yaptığı Doğa Tahrunclassified

Bi̇tümlü Sicak Karişimlardan Geri̇ Dönüşüm Yolu İle Elde Edi̇len Agregalarin Performanslarinin Değerlendi̇ri̇lmesi̇: Deneysel Bi̇r Çalişma

Köfteci

2017

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZHatalı imalatlar ve benzeri nedenlerle ortaya çıkan atık asfaltlar, büyük çevre kirliliğine neden olmaktadırlar. Bu makalede, hatalı imalat sonucu ortaya çıkan atık bitümlü sıcak karışımlardan (BSK) elde edilen geri dönüştürülmüş agregaların, temel karakteristik özelliklerinin değerlendirildiği deneysel bir çalışma sunulmuştur. Bu amaçla, Antalya ilindeki bir yol kesimine ait bitümlü temel tabakasından karot makinesi ile 20 adet numune alınmıştır. Bitümlü sıcak karışımın temel bileşenleri olan agrega ve bitüm, laboratuvarda reflüks (cam) ekstraktörde trikloretilen ile birbirinden ayrıştırılmıştır. Her bir karot numunesindeki agregalara ayrı ayrı elek analizi yapılmış, elde edilen sonuçlar ilgili şartnamedeki bitümlü temel tabakasına ait alt ve üst limit değerler ile karşılaştırılmıştır. Daha sonra, geri kazanılan agregaların yanı sıra yeni kalker ve bazalt agregaların performansları Los Angeles aşınma, yassılık indeksi, soyulma, donma-çözülme ve metilen mavisi deneyleri gibi agrega deneyleri ile analiz edilmiştir. Deneysel testlerden elde edilen sonuçlar, geri kazanım yolu ile elde edilmiş agregaların performanslarının şartname standartlarını karşıladığı, bu nedenle yol üstyapısında tekrar kullanılmasının uygun olduğunu göstermektedir.Anahtar Kelimeler: Atık asfalt, hatalı yol inşaatı, geri dönüştürülmüş agrega, asfaltın ekstraksiyonu, bitümlü temel tabakası PERFORMANCE EVALUATION OF RECYCLED AGGREGATES OBTAINED FROM HOT MIX ASPHALT: AN EXPERIMENTAL STUDY ABSTRACTWaste asphalt pavements occurring from the faulty road construction or similar reasons cause great environmental pollution. This paper presents an experimental study on determination of fundamental characteristics of the recycled aggregates obtained from waste bituminous hot mixtures. For this purpose, 20 drilling core samples from a road segment in Antalya city were taken out by using core drilling machine. Aggregates and bitumen which are the main components of the bituminous hot mixture were separated from each other by using reflux extractor test set. Sieve analysis was performed on the each drilling core samples. Obtained results were compared to the lower and upper limit values of the bituminous base layer according to the related specification. Then, the performance of recycled aggregate, new limestone and basalt aggregates as well were analysed with aggregate tests such as Los Angeles abrasion, flakiness index, stripping resistance, soundness of aggregate by use of magnesium sulfate and methylene blue. According to the results obtained from the experimental tests, it can be said that recycled aggregates meet requirements of asphalt specifications and they can be used as aggregate again in asphalt pavement.

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“…In particular, in the middle part of the specimen, under a higher loading rate, due to the inertia of the material, the lateral strain of the specimen is restricted, and the higher the strain rate is, the more obvious the restriction will be, showing an obvious strain ratio effect, which causes the material modulus and strength to increase with the growth of loading rate [16]. The modulus and strength of asphalt mixture has a similar change pattern [17][18][19][20]. In the same way, in this paper, the change rule that the modulus of the cement stabilized macadam material changes with the loading rate also proves this conclusion.…”

Section: Analysis On the Change Rules Of The Three Moduli With The Lomentioning

confidence: 99%

Research on differences and correlation between tensile, compression and flexural moduli of cement stabilized macadam

Yang¹,

Zheng²

2017

Frattura Ed Integrità Strutturale

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In order to reveal the differences and conversion relations between the tensile, compressive and flexural moduli of cement stabilized macadam, in this paper, we develop a new test method for measuring three moduli simultaneously. By using the materials testing system, we test three moduli of the cement stabilized macadam under different loading rates, propose a flexural modulus calculation formula which considers the shearing effect, reveal the change rules of the tensile, compression and flexural moduli with the loading rate and establish the conversion relationships between the three moduli. The results indicate that: three moduli become larger with the increase of the loading rate, showing a power function pattern; with the shear effect considered, the flexural modulus is increased by 47% approximately over that in the current test method; the tensile and compression moduli of cement stabilized macadam are significantly different. Therefore, if only the compression modulus is used as the structural design parameter of asphalt pavement, there will be a great deviation in the analysis of the load response. In order to achieve scientific design and calculation, the appropriate design parameters should be chosen based on the actual stress state at each point inside the pavement structure.

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Effects of recycled asphalt pavements on the fatigue life of asphalt under different strain levels and loading frequencies

Cited by 116 publications

References 10 publications

Fatigue Resistance Characterization of Warm Asphalt Rubber by Multiple Approaches

Fatigue Resistance Characterization of Warm Asphalt Rubber by Multiple Approaches

Bi̇tümlü Sicak Karişimlardan Geri̇ Dönüşüm Yolu İle Elde Edi̇len Agregalarin Performanslarinin Değerlendi̇ri̇lmesi̇: Deneysel Bi̇r Çalişma

Research on differences and correlation between tensile, compression and flexural moduli of cement stabilized macadam

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