Effect of ageing and temperature on the fatigue behaviour of bitumens

Recasens, José Rodrigo Miró; Martínez, Ana María Romero; Moreno-Navarro, Fernando; Rubio-Gámez, M.C.

doi:10.1016/j.matdes.2015.07.076

Cited by 76 publications

(30 citation statements)

References 16 publications

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“…Nevertheless, it was also observed that the modified bitumen mixture was more susceptible to the effects of ageing and temperature than the conventional bitumen one. Similar conclusions were obtained by Miró, et al [23].…”

Section: Studied Parameters: Initial Modulus Failure Strain and Cumusupporting

confidence: 92%

Ageing and temperature effect on the fatigue performance of bituminous mixtures

López-Montero

Recasens

2017

Mater. construcc.

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ABSTRACT:The ageing of asphalt mixes, together with their exposure to low temperatures, causes a progressive increase of cracking. In this paper, the effect of ageing and temperature on the fatigue of asphalt concretes made with two types of binders, conventional (50/70) and polymer modified bitumen (PMB), is studied. For this purpose, specimens previously subjected to an accelerated laboratory ageing process were tested by a strain sweep test at different temperatures (-5ºC, 5ºC and 20°C). Results were compared with the obtained from the unaged specimens showing the relative importance of ageing, temperature and type of bitumen on the parameters that determine the fatigue life of the mixture. The mixtures behaviour becomes more brittle with ageing and the decrease of temperature. However, ageing hardly has an effect on fatigue at lower temperatures. In general, mixtures made with polymer modified bitumen have a better fatigue performance to ageing and temperature. RESUMEN: Efecto del envejecimiento y de la temperatura en el comportamiento a fatiga de las mezclas bituminosas.el envejecimiento de las mezclas, unido a su exposición a bajas temperaturas, provoca un progresivo aumento de su fisuración. En este trabajo, se estudia el efecto del envejecimiento y la temperatura en la fatiga de una mezcla semidensa fabricada con dos tipos de ligantes, 50/70 y PMB 45/80-65. Para ello, probetas previamente sometidas a envejecimiento acelerado en laboratorio fueron ensayadas mediante un ensayo de barrido de deformaciones, a diferentes temperaturas (-5, 5 y 20ºC). Los resultados fueron comparados con los obtenidos en mezclas no envejecidas mostrando la importancia del envejecimiento, temperatura y ligante sobre los parámetros que condicionan la vida a fatiga de la mezcla. El comportamiento de las mezclas es más frágil debido al envejecimiento y la disminución de la temperatura. Sin embargo, el envejecimiento apenas influye en la fatiga a temperaturas bajas. En general, las mezclas con betún modificado muestran mejor respuesta a fatiga frente a envejecimiento y temperatura.

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Section: Studied Parameters: Initial Modulus Failure Strain and Cumusupporting

confidence: 92%

Ageing and temperature effect on the fatigue performance of bituminous mixtures

López-Montero

Recasens

2017

Mater. construcc.

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“…This means the bitumen is subjected to a more severe fatigue damage when the loading level is increased or the material itself becomes relatively stiffer such as undergoing an oxidative ageing, a low temperature, or a high frequency. These observations are consistent with the common understanding and the existing studies of the fatigue behaviour of a bitumen material (Shan, Tian, He, & Ren, 2017;Miró, Martínez, Moreno-Navarro, & Rubio-Gámez, 2015). It is also noted from Figures 6 and 7 that the results at each testing condition have a good consistency between the two replicates, which indicate that the variation is minor for the fatigue damage tests done in this study.…”

Section: Comparison Between Calculated and Measured Crack Lengthsupporting

confidence: 91%

Predicting crack growth in viscoelastic bitumen under a rotational shear fatigue load

Zhang

Gao

2019

Road Materials and Pavement Design

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This study develops a damage mechanics-based crack growth model to predict crack length in a typical viscoelastic material (i.e., bitumen) under a rotational shear fatigue load. This crack growth model was derived using torque and dissipated strain energy equilibrium principles. The crack length was predicted using bitumen's shear moduli and phase angles in the undamaged and damaged conditions, measured by linear amplitude sweep (LAS) tests and time sweep (TS) tests, respectively. The two tests were both performed using Dynamic Shear Rheometer (DSR), thus the crack growth model was named as a DSR-C model. To validate the DSR-C model, the crack lengths after the TS tests were measured using digital visualisation of cracking surfaces for one virgin bitumen and one polymer-modified bitumen at two temperatures (15, 20 °C), two frequencies (10, 20 Hz) and two strain levels (5%, 7%) under unaged and aged conditions. Results show that the DSR-C model can accurately predict the crack length in the viscoelastic bitumen under the rotational shear fatigue load at different loading and material conditions. The crack growth includes initial transition period, steady growth period and rapid growth period under a controlled strain loading mode. The degradation of the material property results from the crack growth that initiates from the outer edge toward the centre of the sample under the rotational shear load.

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“…Rheology involves the study and evaluation of the time-temperature dependent response of materials that are stressed or subjected to an applied force. Rheological characterisation of bitumen includes testing for age hardening, temperature susceptibility, shear susceptibility, stiffness and viscosity (Miró et al 2015). Because of that, more researchers currently use the dynamic shear rheometer (DSR) to determine the effect of ageing on the rheological and fatigue properties of bitumen.…”

Section: Introductionmentioning

confidence: 99%

Rheological, fatigue and relaxation properties of aged bitumen

Jing

Varveri

Liu

et al. 2019

International Journal of Pavement Engineering

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Bitumen ageing has a significant impact on the mechanical performance of asphalt concrete. This study utilises dynamic mechanical tests (frequency sweep, fatigue, and relaxation) to investigate the effect of ageing on the viscoelastic characteristics of bitumen. As ageing progressed, a shift of the Black diagrams curves towards lower phase angles was observed; at the same time the shape of the curves changed to a straight line and the curvature reduced. Interestingly, based on the standard fatigue analysis criteria, ageing appears to have a positive effect on bitumen fatigue life. Consequently, it occurs that studying only the stiffness and fatigue behaviour of bitumen cannot directly characterise ageing-induced degradation. The stress relaxation test was found to be more suitable to characterise ageing of bitumen. Aged bitumen had higher residual stresses and longer relaxation times. Hence, aged bitumen was found to be more susceptible to stress accumulation and thus cracking. A linear relationship was established between the crossover modulus and the stress relaxation ageing indices for the studied bitumen. This relationship suggests that crossover modulus has the potential to be used as a parameter to characterise the bitumen relaxation properties by means of routine tests such as the DSR frequency sweep tests.

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Effect of ageing and temperature on the fatigue behaviour of bitumens

Cited by 76 publications

References 16 publications

Ageing and temperature effect on the fatigue performance of bituminous mixtures

Ageing and temperature effect on the fatigue performance of bituminous mixtures

Predicting crack growth in viscoelastic bitumen under a rotational shear fatigue load

Rheological, fatigue and relaxation properties of aged bitumen

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