Effect of ageing on micromechanical properties of bitumen by means of atomic force microscopy

Aguiar-Moya, José Pablo; Salazar-Delgado, Jorge; García, Adriana; Baldi, Alejandra; Bonilla-Mora, Vivian; Loría-Salazar, Luis Guillermo

doi:10.1080/14680629.2017.1304249

Cited by 38 publications

(10 citation statements)

References 32 publications

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“…When it comes to the fractions of bitumen, previous studies were also limited to the explanation that a sequential reaction, of aromatic to resin and finally to asphaltene fraction, takes place [23][24][25]. No further evidence for the mechanisms behind these changes and the accompanied reasoning has been provided apart from microstructural changes observed with the use of microscopy [26][27][28][29]. Challenges arise when specific products of ageing in bitumen are needed to be confirmed experimentally.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Experimental investigation of the oxidative ageing mechanisms in bitumen

Pipintakos

Ching

Soenen³

et al. 2020

Construction and Building Materials

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Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Experimental investigation of the oxidative ageing mechanisms in bitumen

Pipintakos

Ching

Soenen³

et al. 2020

Construction and Building Materials

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“…This is mainly due to the development of physicochemical interactions between the fresh bitumen of the blend and the bituminous film coating the aggregate, which also ensures a more efficient bond with the aggregate substrate after water conditioning. Indeed, such an improved interaction can be partly explained considering that the aging experienced by the thin bitumen film results in an increase in adhesiveness properties of bitumen [48], which likely enhances the bond at the interface, making the system more resistant to stripping.…”

Section: Comparison Between Systems With Virgin and Pre-coated Aggregatementioning

confidence: 99%

Asphalt Binder Modification with Plastomeric Compounds Containing Recycled Plastics and Graphene

et al. 2022

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Polymer-modified bitumens are usually employed for enhancing the mixture performance against typical pavement distresses. This paper presents an experimental investigation of bitumens added with two plastomeric compounds, containing recycled plastics and graphene, typically used for asphalt concrete dry modification. The goal was to study the effects of the compounds on the rheological response of the binder phase, as well the adhesion properties, in comparison with a reference plain bitumen. The blends (combination of bitumen and compounds) were evaluated through dynamic viscosity tests, frequency sweep tests, and multiple stress creep recovery (MSCR) tests. Moreover, the bitumen bond strength (BBS) test was performed to investigate the behavior of the systems consisting of blends and aggregate substrates (virgin and pre-coated). The rheological tests indicated that both blends performed better than the plain bitumen, especially at high temperature, showing an enhanced rutting resistance. In terms of bond strength, comparable results were found between the blends and reference bitumen. Moreover, no performance differences were detected between the two types of blends.

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“…Added to this, aged asphalt binders contained a greater quantity of molecules and polar functional groups [8,42,62,63], which causes asphaltenes to start to prevail (increasing stiffness and viscosity) over other components that contribute with adherence such as resins [64]. According to [65], adhesion is directly correlated with the non-polar fractions of asphalt binder while stiffness is likewise with polar fractions.…”

Section: Marshall and Its Testsmentioning

confidence: 99%

Influence of Gradation on the Mechanical Properties of Aged Hot-Mix Asphalts

2021

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When a hot-mix asphalt (HMA) ages, its mechanical properties, resistance, and durability change. Several studies have been conducted throughout the world to evaluate the effects of aging in HMAs. However, few studies have analyzed the influence of gradation. The main objective of this study was to evaluate the influence of gradation on the mechanical properties of aged HMA mixes. For such purposes, three HMA mixes with different gradations were manufactured (named HMA-10, HMA-19, and HMA-25), which were conditioned in STOA (short-term oven aging) and LTOA (long-term oven aging) by following the guidelines established by the AASHTO R30 specification. Marshall, Indirect Tensile Strength (ITS), resilient modulus, permanent deformation, fatigue (under controlled-stress condition), and Cantabro tests were performed. These tests were carried out to evaluate resistance under monotonic and cyclic load as well as the resistance to moisture damage and abrasion. The best performing mix in the test was HMA-19. There is no clear trend about the influence of gradation over the susceptibility of mixes for aging. This susceptibility changes depending on the test performed and the property measured. Furthermore, in resilient modulus tests, it is observed that the influence of gradation on aging susceptibility changes depending on the test temperature.

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Effect of ageing on micromechanical properties of bitumen by means of atomic force microscopy

Cited by 38 publications

References 32 publications

Experimental investigation of the oxidative ageing mechanisms in bitumen

Experimental investigation of the oxidative ageing mechanisms in bitumen

Asphalt Binder Modification with Plastomeric Compounds Containing Recycled Plastics and Graphene

Influence of Gradation on the Mechanical Properties of Aged Hot-Mix Asphalts

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