Testing protocol to obtain failure properties of asphalt binders at low temperature using creep compliance and stress-controlled strength test

Marasteanu, Mihai; Ghosh, Debaroti; Falchetto, Augusto Cannone; Turos, Mugurel

doi:10.1080/14680629.2017.1304246

Cited by 16 publications

(16 citation statements)

References 8 publications

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“…Direct tensile strength of asphalt mixture as a function of temperature can be estimated based on binder properties and mix volumetric composition, as proposed by Teltayev and Radovskiy [20]. Falchetto et al [21], Marasteanu et al [22], and Velásquez et al [23] tested asphalt mixture strength at low temperatures using the bending beam rheometer (BBR). These investigations proved simple linear relationships between TSRST critical cracking temperature and strength and the corresponding BBR values.…”

Section: Introductionmentioning

confidence: 99%

Influence of Bitumen Type and Asphalt Mixture Composition on Low-Temperature Strength Properties According to Various Test Methods

Pszczoła

Szydłowski

2018

Materials

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In regions with low-temperatures, action transverse cracks can appear in asphalt pavements as a result of thermal stresses that exceed the fracture strength of materials used in asphalt layers. To better understand thermal cracking phenomenon, strength properties of different asphalt mixtures were investigated. Four test methods were used to assess the influence of bitumen type and mixture composition on tensile strength properties of asphalt mixtures: tensile strength was measured using the thermal stress restrained specimen test (TSRST) and the uniaxial tension stress test (UTST), flexural strength was measured using the bending beam test (BBT), and fracture toughness was measured using the semi-circular bending test (SCB). The strength reserve behavior of tested asphalt mixtures was assessed as well. The influence of cooling rate on the strength reserve was investigated and correlations between results from different test methods were also analyzed and discussed. It was observed that the type of bitumen was a factor of crucial importance to low-temperature properties of the tested asphalt concretes. This conclusion was valid for all test methods that were used. It was also observed that the level of cooling rate influenced the strength reserve and, in consequence, resistance to low-temperature cracking. It was concluded that reasonably good correlations were observed between strength results for the UTST, BBT, and SCB test methods.

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Section: Introductionmentioning

confidence: 99%

Influence of Bitumen Type and Asphalt Mixture Composition on Low-Temperature Strength Properties According to Various Test Methods

Pszczoła

Szydłowski

2018

Materials

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“…By imposing constraints related to the duration of the test (1 min for practical reasons, similar to the criterion used for establishing the strain rate for DTT), and knowing that, based on hundreds of tests performed, the failure stress does not exceed 12MPa, a loading rate of 0.65 N/s was proposed for routine testing ( 8 ). The tests are performed at PGLT + 10°C and also at PGLT + 4°C, similar to current BBR and DTT specifications.…”

Section: Development Of Bbr Strength Testing Proceduresmentioning

confidence: 99%

Simple Method to Evaluate Strength and Relaxation Properties of Asphalt Binders at Low Temperature

Oliveira

Yan

Turos

et al. 2019

Transportation Research Record: Journal of the Transportation R

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Low temperature cracking represents the main distress in asphalt pavements built in cold regions. During the Strategic Highway Research Program (SHRP) two test methods were developed to investigate the low temperature behavior of asphalt binders: bending beam rheometer (BBR) and direct tension tester (DTT). In this research, a simple testing protocol developed to obtain failure properties of asphalt binders at low temperatures is used to characterize the behavior of five asphalt binders used in the construction of MnROAD test cells in 2016. It is shown that a combination of creep followed by strength testing provides a more complete picture of the low temperature properties of asphalt binders and can improve the selection process. Binders with similar creep and relaxation properties have significantly different failure properties. It is also demonstrated that BBR strength data is obtained under linear viscoelastic conditions for the entire duration of the test and that creep and strength data can be interconverted using linear viscoelasticity.

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“…Notwithstanding the merits of both test methods, several studies have highlighted some of their limits. In particular, it has been shown that binders with the same low limiting PG temperature may exhibit significant differences in terms of actual performance in the field [21,22], and that use of such a limiting temperature may not be effective in capturing the enhanced low temperature performance of polymer-modified bitumen (PMB) [23]. In the case of BBR tests, the main shortcomings derive from the fact that loading conditions do not lead to the rupture of test specimens, thereby preventing any direct assessment of the tensile strength and cracking resistance of the material.…”

Section: Introductionmentioning

confidence: 99%

A novel methodology for the evaluation of low temperature failure properties of asphalt binders

et al. 2021

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This paper presents the results of an experimental investigation that focused on the failure properties of asphalt binders at low temperatures. A novel test method was developed, based on the use of the dynamic shear rheometer equipped with 4 mm parallel plates. The method entails the application of constant shear strain rates at various temperatures until failure. Test data are modelled by means of the elasticviscoelastic correspondence principle and by thereafter referring to the shear stress at failure, to a purposely defined brittleness index and to a critical brittleness temperature. Results discussed in the paper, which refer to a preliminary set of experimental data, indicate that the proposed methodology may be very effective in evaluating and comparing low temperature failure properties of asphalt binders of various types and origins.

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Testing protocol to obtain failure properties of asphalt binders at low temperature using creep compliance and stress-controlled strength test

Cited by 16 publications

References 8 publications

Influence of Bitumen Type and Asphalt Mixture Composition on Low-Temperature Strength Properties According to Various Test Methods

Influence of Bitumen Type and Asphalt Mixture Composition on Low-Temperature Strength Properties According to Various Test Methods

Simple Method to Evaluate Strength and Relaxation Properties of Asphalt Binders at Low Temperature

A novel methodology for the evaluation of low temperature failure properties of asphalt binders

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