Investigating the effects of aging and loading rate on low-temperature cracking resistance of core-based asphalt samples using semi-circular bending test

Saeidi, Hadi; Aghayan, Iman

doi:10.1016/j.conbuildmat.2016.09.054

Cited by 44 publications

(10 citation statements)

References 23 publications

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“…This is the expected behavior for a very brittle and stiff material, i.e., a small change in strain amplitude can make the material shift from the linear visco-elastic domain to total failure. These results are consistent with other research studies, such as the one performed by Saeidi and Aghayan (2016), that showed that aged mixtures at low temperatures experienced a significant decrease in failure deformation obtained using the SCB test.…”

Section: Aging Effectsupporting

confidence: 93%

New methodology to estimate the fatigue behavior of bituminous mixtures using a strain sweep test

Nieto

Jiménez

Recasens

et al. 2017

Construction and Building Materials

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Fatigue cracking of bituminous mixtures is closely related to the loss of ductility produced by the stiffening of the bituminous binder. The main two factors that cause the asphalt binder to lose its ductility are aging and exposure to low temperatures. However, most of the tests designed to evaluate the fatigue behavior of bituminous mixtures are very time consuming, and make unpractical those studies that try to evaluate the influence of many variables. In this research project a strain sweep test was used to analyze the influence of aging, test temperature and bituminous binder type on the fatigue behavior of a continuously graded mixture. As expected, the mixture with SBS polymer modified binder retained more ductility at low temperatures, while the mixture with crumb rubber modified binder had the highest stiffness modulus. All mixtures exhibited the worst fatigue behavior at low temperatures and aging was equivalent to testing an unaged mixture at a lower temperature. The main result of this paper was the implementation of a new methodology to estimate the fatigue law of the material using a strain sweep test, which allowed this fatigue analysis to be carried out in nearly 10 times less testing time than that required by the procedure described in the EN 12697-24 standard.Peer ReviewedPostprint (author's final draft

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Section: Aging Effectsupporting

confidence: 93%

New methodology to estimate the fatigue behavior of bituminous mixtures using a strain sweep test

Nieto

Jiménez

Recasens

et al. 2017

Construction and Building Materials

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“…Fibres in bituminous mixtures also have the ability to decrease the drain-down of those mixtures [26], at the same time increasing ductility due to enhancement of their mechanical properties [27]. Fibre reinforcing bituminous mixtures work as a crack barrier by carrying tensile stresses to prevent the formation and propagation of cracks [28]. Ferrotti, et al [29]…”

Section: Cold MIX Asphalt (Cma) Reinforcementmentioning

confidence: 99%

A laboratory study of high-performance cold mix asphalt mixtures reinforced with natural and synthetic fibres

Shanbara

Ruddock

Atherton

2018

Construction and Building Materials

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This research aims to examine the impact of using natural and synthetic fibres as reinforcing materials, on the mechanical properties and water susceptibility of cold mix asphalt (CMA) including indirect tensile stiffness and resistance to rutting, cracking and moisture damage. Four different types of fibres were used: glass as a synthetic fibre, and hemp, jute and coir as natural fibres. Various samples of CMA, with and without fibres, were fabricated and tested. Traditional hot mix asphalt (HMA) was also used for comparison. The results indicate a significant improvement in the indirect tensile stiffness modulus, for all fibre-reinforced CMA mixtures, over different curing times. The improved tensile behaviour represents a substantial contribution towards slowing crack propagation in bituminous mixtures, while scanning electron microscopy analysis confirmed the fibre shape and surface roughness characteristics. The improved performance of the reinforced mixtures with both natural and synthetic fibres, facilitated a substantially lower permanent deformation than traditional hot and cold mixtures at two different temperatures (45 and 60°C). When using glass and hemp fibres as reinforcing materials, there was 2 a significant improvement in CMA in terms of water sensitivity. Resistance to surface cracking was also improved when fibres were incorporated. Based on the test results, 0.35% fibre content by mass of dry aggregate and 14mm fibre length are recommended to achieve the optimum performance output for indirect tensile stiffness.

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“…The results also depend on reclaimed asphalt (RA) content. Saeidi et al (2016) [32] stated that as the bituminous binder ages, the stiffness increases which leads to consequently fracture energy increase; however, the failure displacement decreases.…”

Section: Introductionmentioning

confidence: 99%

Influence of Laboratory Long-Term Aging on Selected Fracture Parameters of Asphalt Mixtures

2021

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The paper presents the influence of laboratory aging simulation on fracture properties determined on 150 variants of asphalt mixtures. The fracture properties were determined by two different test approaches—semi-circular bending test (SCB test) and three-point bending test on beam specimens (3-PB test). The aging was simulated according to one of the methods defined in EN 12697-52 (storage of test specimens in chamber at temperature of 85 °C for 5 days). The evaluated group of variants covered asphalt mixtures for all road layers. The group was further divided according to used bituminous binder (unmodified vs. modified) and reclaimed asphalt content. The results showed that strength parameters (flexural strength and fracture toughness) increase with aging. It further shows that fracture work provides more complex information about the cracking behavior. For the aging indexes, it was found that for mixtures with modified binders and mixtures which did not contain reclaimed asphalt (RA), the values were higher. The aging indexes for fracture work showed different results for both performed tests.

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Investigating the effects of aging and loading rate on low-temperature cracking resistance of core-based asphalt samples using semi-circular bending test

Cited by 44 publications

References 23 publications

New methodology to estimate the fatigue behavior of bituminous mixtures using a strain sweep test

New methodology to estimate the fatigue behavior of bituminous mixtures using a strain sweep test

A laboratory study of high-performance cold mix asphalt mixtures reinforced with natural and synthetic fibres

Influence of Laboratory Long-Term Aging on Selected Fracture Parameters of Asphalt Mixtures

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