Laboratory and field study of fatigue cracking prediction in asphalt pavements.

Bessa, Iuri Sidney

doi:10.11606/t.3.2018.tde-15012018-160715

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…is relationship follows the structural form of the Medani and Molenaar model, in which the parameters k and n are calibrated according to the values of N f and ε t from the fatigue test results of the 4PB bending beam [36].…”

Section: Modeling Thementioning

confidence: 99%

Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture

Shafabakhsh

Akbari

Bahrami

2020

Advances in Civil Engineering

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Fatigue failure is regarded as one of the most common failures in the road pavement and necessitates spending huge cost annually to maintain the road. Asphalt binder modification and asphalt mixture reinforcement are among the commonly used methods to increase the pavement resistance to a failure caused by fatigue. By proposing a modified-reinforced composite hot mix asphalt (MRC-HMA), the present study aimed to examine the fatigue life of this mixture with one of the most traditional methods (i.e., four-point bending beam fatigue test) and compare it at constant strain conditions and the strain levels of 500, 700, and 900 μ ε and a temperature of 20 ± 0.8 ° C to that of the other three specimens, including control specimens, geogrid-reinforced (GR-HMA) specimens, and nanosilica-modified (NSM-HMA) specimens with 5% nanosilica. In all experiments, the condition to reach the failure stage was assumed equivalent to a 50% reduction in the stiffness coefficient in each load repetition, and the load was applied semisinusoidal at a frequency of 10 Hz without rest. The results showed that the MRC-HMA mixture improved the fatigue life at the strain level of 500 μ s by about 701, 172.5, and 156.4% compared to the control, NSM-HMA, and GR-HMA specimens, respectively. Based on the results, the use of GR-HMA specimens has almost the same results as NSM-HMA ones, but the use of the MRC-HMA mixture can significantly increase the fatigue life of MRC-HMA in all three levels of strain compared to all specimens studied in the present study. Thus, the introduced mixture can be a proper choice for pavements with heavy or light (with a large amount) traffic loads, which usually have a vast adverse effect on the fatigue behaviour of asphalt mixtures.

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Section: Modeling Thementioning

confidence: 99%

Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture

Shafabakhsh

Akbari

Bahrami

2020

Advances in Civil Engineering

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“…Nonetheless, four point bending beam tests are recognized to display a better ability to simulate +ield conditions (Tayebali et al, 1994). In Brazil, the four point bending beam test has being employed for asphalt mixtures fatigue characterization in various research projects, such as Colpo (2014), Klinsky et al (2014), Melo (2014), Ceratti et al (2017) and Bessa (2017).…”

Section: Introductionmentioning

confidence: 99%

Fatigue behavior study of a dense graded HMA using the four point bending beam test aided by an in-situ instrumentation at BR-116/RS, Brazil

et al. 2020

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A fadiga é caracterizada pela deterioração estrutural de um material quando submetido a repetidos esforços de tensão-deformação. O ensaio laboratorial comumente empregado no Brasil para análise de fadiga em misturas asfálticas é o ensaio de tração indireta (IDT). Como alternativa ao ensaio IDT, o ensaio de flexão em quatro pontos (4PBBT) submete o material a um estado de tensões mais realístico em relação ao campo. Este trabalho avaliou o comportamento à fadiga de uma mistura asfáltica com ligante modificado por polímero (PG76-11) usando os ensaios IDT e 4PBBT. Um segmento da rodovia BR-116/RS, pavimentado com o mesmo material, foi instrumentado para monitorar as respostas mecânicas na camada asfáltica, permitindo a avaliação do material sob condições de tráfego real, e através do monitoramento ao longo do tempo, permitindo melhor entendimento do desgaste estrutural. Em relação aos ensaios laboratoriais, o ensaio 4PBBT apresentou uma melhor relação com o observado em campo.

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“…In real field scenarios, the rupture due to fatigue is traditionally characterized by cracks that initiate at the bottom of the bituminous layer and propagate to the surface level. In laboratory, the fatigue life of bituminous mixtures is addressed in terms of fracture life (Nf) or service life (Ns), which correlate the number of load applications to fatigue failure or to a decrease in the performance of the specimen, respectively (BESSA, 2017;SANTOS, 2020). Fatigue tests can be conducted for a range of frequencies and temperatures, as to recreate the field traffic loading and velocity, rest period, and climatic condition for specific locations and/or periods of the year (ISLAM;…”

Section: Consideration Of Traffic-induced Loadsmentioning

confidence: 99%

Thermomechanical behaviour of bituminous layers containing rigid inserts for eRoads

Alves¹

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Laboratory and field study of fatigue cracking prediction in asphalt pavements.

Cited by 4 publications

References 33 publications

Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture

Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture

Fatigue behavior study of a dense graded HMA using the four point bending beam test aided by an in-situ instrumentation at BR-116/RS, Brazil

Thermomechanical behaviour of bituminous layers containing rigid inserts for eRoads

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