Fatigue and healing properties of nano-reinforced bituminous binders

Santagata, Ezio; Baglieri, Orazio; Tsantilis, Lucia; Chiappinelli, Giuseppe

doi:10.1016/j.ijfatigue.2015.05.008

Cited by 83 publications

(23 citation statements)

References 38 publications

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“…Such a choice, which is not consistent with the recommendations of the AASHTO standard, was dictated by the need to focus on the assessment of the full fatigue resistance potential of the considered PMBs, with no superposed effect due to polymer degradation and additional variability due to ageing procedures. Similar studies are documented in literature for binders containing non-conventional polymers and additives [35,36].…”

Section: Advanced Performance-related Characterization Of Pmbssupporting

confidence: 84%

Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification

et al. 2020

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The study described in this paper focused on the possible use of waste products coming from the production of styrene–butadiene rubber (SBR) and polybutadiene rubber (PBR), as bitumen modifiers. Modified binders containing these products were prepared in the laboratory with different polymer dosages and were thereafter subjected to the evaluation of empirical and rheological properties. For comparative purposes, the study also considered SBR and PBR products of premium quality. Ageing effects were also taken into account by means of proper laboratory simulations. Obtained results indicated that the two types of polymer (SBR and PBR) have completely different effects on the rheology and expected performance of the resulting modified binders. In particular, while the two polymers showed similar effects in terms of resistance to permanent deformation, the SBR products proved to be superior from the viewpoint of fatigue resistance. However, only minor differences were found when comparing the effects produced by premium quality and waste polymers. As a result of the experimental findings, it was concluded that the use of waste SBR polymers can be an attractive solution for the production of affordable modified binders.

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Section: Advanced Performance-related Characterization Of Pmbssupporting

confidence: 84%

Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification

et al. 2020

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“…In the literature, the presented additives have been added to a bituminous base compliant with AASHTO M 320 [56]. The added percentage by weight of bitumen varies between 0.1% and 1% for CNTs and GNP, and between 3% and 6% for nanoclays and nanosilica; in any case dosage of nanoclays and nanosilica is higher than that of CNTs [22,[57][58][59][60]. The added percentage by weight of bitumen varies between 4% and 6% for nano-calcium oxide [47] and between 1% and 7% for nano-titanium dioxide.…”

Section: Methodsmentioning

confidence: 99%

Behavior Evaluation of Bituminous Mixtures Reinforced with Nano-Sized Additives: A Review

Fusco¹,

Moretti²,

Fiore³

et al. 2020

Sustainability

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This article presents a comparative review of the most commonly used nano-additives for bituminous mixtures: nanoclays (NC), nanosilicates, carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), nano-calcium oxide (CaO), and nano-titanium dioxide (TiO2). In this study, the mechanical behavior of the obtained additive mixture is evaluated. According to the revised literature, the results strongly depend on type, concentration, and dispersal of used nano-additive. In fact, it has been seen that simple shear mixing followed by sonication homogenizes the distribution of the nanoparticles within the bituminous matrix and favors the bonds’ formation. The viscosity of the mixture of bitumen with nanoparticles improves with the increase of the percentage of additive added: it indicates a potential improvement to permanent deformation and rutting. Another benefit is an increased resistance of the binder to aging. Furthermore, it has been shown that the nanoparticles are able to prolong the service life of a bituminous mixture by means of various interdependent chemical–physical mechanisms that can influence the resistance to fatigue failure or the ability to self-heal. However, the effectiveness of these improvements depends on the particle type, added quantity and mixing technique, and the tests carried out.

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“…The effectiveness of both nanoclays and carbon nanotubes as reinforcing agents in asphalt binders and mastics has been assessed by many authors. In particular, it has been shown that these types of nanosized additives, if properly dosed and mixed with the base binder, may have a significant impact on viscoelastic properties, on the resistance to permanent deformation and on fatigue behaviour …”

Section: Introductionmentioning

confidence: 99%

Impact of nanosized additives on the fatigue damage behaviour of asphalt mixtures

Santagata

Baglieri

Miglietta

et al. 2019

Fatigue Fract Eng Mat Struct

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The study presented in this paper aimed at evaluating the impact of different nanosized additives, including an organophilic nanoclay and multiwall carbon nanotubes, on the fatigue properties of dense‐graded asphalt mixtures. Cyclic direct tension fatigue tests were carried out, and the corresponding results were interpreted by means of a simplified version of the visco‐elastic continuum damage model. The experimental investigation also included linear viscoelastic characterization of the considered materials. Results derived from tests carried out on the mixtures containing nanosized additives were compared with those obtained for a reference standard mixture. It was found that the use of the abovementioned additives can give a substantial contribution to the enhancement of the fatigue damage resistance of asphalt mixtures. Moreover, when comparing the two types of additives, it was observed that organophilic nanoclays can outperform multiwall carbon nanotubes.

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Fatigue and healing properties of nano-reinforced bituminous binders

Cited by 83 publications

References 38 publications

Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification

Experimental Investigation on the Use of Waste Elastomeric Polymers for Bitumen Modification

Behavior Evaluation of Bituminous Mixtures Reinforced with Nano-Sized Additives: A Review

Impact of nanosized additives on the fatigue damage behaviour of asphalt mixtures

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