The impact of carbon nano-fiber modification on asphalt binder rheology

Khattak, Mohammad Jamal; Khattab, Ahmed; Rizvi, Hashim R.; Zhang, Pengfei

doi:10.1016/j.conbuildmat.2011.12.022

Cited by 198 publications

(73 citation statements)

References 8 publications

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“…Values of these parameters were respectively fixed at 30 and 60 min and at 87.5 and 157.5 lm. In the case of sonication duration, these values were adapted from those proposed elsewhere for carbon nano-fibres and nanoclays dispersions [20,21,23]. Selected amplitudes correspond to 50% and 90% of the maximum value that can be attained by the equipment.…”

Section: Preparation Of Nano-reinforced Blendsmentioning

confidence: 99%

“…Experimental results published by ZareShahabadi et al [20] indicate that the combined use of sonication and shear stresses during mixing may lead to intercalated or exfoliated structures, depending on the type of employed silicate. Khattak et al [21] showed that preliminary sonication treatment of carbon nano-fibres in a solvent may be beneficial to enhance visco-elastic and fatigue characteristics of bitumen. Santagata et al [22] demonstrated that an actual reinforcement effect against fatigue cracking can be achieved in binders modified with carbon nanotubes when dispersion is performed by means of ultrasounds.…”

Section: Introductionmentioning

confidence: 99%

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Effect of sonication on high temperature properties of bituminous binders reinforced with nano-additives

Santagata

Baglieri

Tsantilis

et al. 2015

Construction and Building Materials

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Section: Preparation Of Nano-reinforced Blendsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of sonication on high temperature properties of bituminous binders reinforced with nano-additives

Santagata

Baglieri

Tsantilis

et al. 2015

Construction and Building Materials

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“…One big challenge in developing nano-reinforced bituminous binders is the dispersion of nano-particles within the base matrix by means of a proper mixing technique (Santagata 2015a, b;Khattak et al 2012;Merusi et al 2012). Moreover, for end-use purposes, achieved dispersion should be maintained in time during high-temperature storage.…”

Section: Introductionmentioning

confidence: 99%

Storage Stability of Bituminous Binders Reinforced with Nano-Additives

et al. 2015

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The experimental investigation presented in this paper focused on storage stability of bituminous binders containing nano-sized additives. Several blends were prepared in the laboratory by combining three base bitumens with two different types of nanoclays and one type of carbon nanotubes at various dosages. A technique based on the combination of simple shear mixing and sonication was proposed to achieve adequate dispersion of nano-particles in bitumen. Capability of materials to withstand segregation phenomena was evaluated by means of viscosity measurements performed on samples derived from simulative laboratory storage tests. Results obtained in the study revealed that high-temperature stability of nano-reinforced binders is dependent upon physico-chemical properties of base components, thus highlighting the key role played in such a context by interaction mechanisms that take place between nano-additives and dispersing bituminous medium.

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“…This result is consistent with the Fourier Transform Infra-red Spectroscopy (FTIR) outputs indicating lower carbonyl index in the modified asphalt binder. Khattak et al [9,21] studied the effects of carbon Nanofiber (CNF) on rheological properties of asphalt binders and performance of asphalt mixtures. The results indicated that presence of CNF in asphalt binder will significantly enhance the rheological properties of asphalt binders in terms of viscosity, G ⁄ /sin d and fatigue life.…”

Section: Introductionmentioning

confidence: 99%

“…In the asphalt pavement industry, various types of Nano-materials have been developed and used, including Nano-silica powder [7], carbon Nano-fibers [8,9], carbon Nano-tubes [10][11][12][13], non-modified and polymer modified Nano-clay [6,[14][15][16], as well as polysiloxane-modified montmorillonite [16,17]. The application of Nano-materials as asphalt modifier is growing rapidly due to its unique characteristics that significantly improve the performance of asphalt binder.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the rate of change of rheological properties of nano-modified asphalt

Jamshidi

Hasan

Yao

et al. 2015

Construction and Building Materials

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h i g h l i g h t sTo evaluate the changes in asphalt behavior at the viscous and viscoelastic conditions. Non-dimensional analyses were used to characterize the Nano-modified asphalt performance. Samples evaluation were conducted at various Nano-material type and content, and test temperature. Effects of Nano-modifier on the intermolecular forces of bitumen were evaluated using activation energy. g r a p h i c a l a b s t r a c t a b s t r a c tThis study aims to characterize the rate of change that takes place in the rheological properties of asphalt binders modified with numerous types and contents of nano-materials. The effects of nano-materials on the activation energy of modified asphalt binders under the viscous and visco-elastic behavior were also investigated. Through the research findings, the application of non-dimensional analyses using relative viscosity and relative G ⁄ /sin d (NSRP) are very meaningful to evaluate the rate of change in the rheological properties of asphalt binder per one unit percent of nano-material. It is also found that the nondimensional viscosity index (rg) and non-dimensional Superpave TM rutting factor gradient (rNSRP) are influenced by the type and content of nano-material, and test temperature. The activation energy analysis has confirmed that the changes in amount of energy consumed are not only influenced by the type and content of nano-material, but also the physical phase of the modified asphalt binders.

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The impact of carbon nano-fiber modification on asphalt binder rheology

Cited by 198 publications

References 8 publications

Effect of sonication on high temperature properties of bituminous binders reinforced with nano-additives

Effect of sonication on high temperature properties of bituminous binders reinforced with nano-additives

Storage Stability of Bituminous Binders Reinforced with Nano-Additives

Characterization of the rate of change of rheological properties of nano-modified asphalt

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