Evaluation of Graphite Nanoplatelets Influence on the Lubrication Properties of Asphalt Binders.

Published on Feb 7, 2020in Materials3.623
路 DOI :10.3390/MA13030772
Tianhao Yan1
Estimated H-index: 1
(UMN: University of Minnesota),
Lorenzo Paolo Ingrassia8
Estimated H-index: 8
(Marche Polytechnic University)
+ 4 AuthorsMihai Marasteanu32
Estimated H-index: 32
(UMN: University of Minnesota)
Sources
Abstract
With the major advance in nanotechnology, there has been an emerging interest in applying nanoscale materials to asphalt pavement materials. Among them, considerable interest has been directed to carbon-based nanomaterials, such as carbon nanotubes (CNTs) and graphite nanoplatelets (GNPs). Recent studies have proven that the addition of small percentages of GNPs could significantly reduce the compaction effort required to densify HMA. Viscosity measurements showed, however, that the addition of GNPs increased the viscosity of the binder. This observation pointed towards the presence of a different mechanism responsible for the reduction of compaction effort. A new test method used for lubricants and based on tribology has been recently proposed in order to characterize the lubricating behaviour of asphalt binders. In this study, the tribological characterization of an asphalt binder modified with GNPs was performed. A novel approach in which aggregate surface microtexture was simulated using rough surfaces of the testing fixtures, shows that indeed, the addition of GNPs lowers the friction coefficient and therefore, enhances the lubrication properties of the binder when mixed with mineral aggregates.
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References23
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#1Biswajit K. Bairgi (UNM: University of New Mexico)H-Index: 8
#2Umme Amina Mannan (AmeriCorps VISTA)H-Index: 10
Last. Rafiqul A. Tarefder (UNM: University of New Mexico)H-Index: 24
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AbstractAsphalt binder acts as a lubricant film between two aggregates during mixing and compaction. The frictional phenomena in an asphalt鈥揳ggregate interaction play an important role in mixing an...
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#1Lorenzo Paolo Ingrassia (Marche Polytechnic University)H-Index: 8
#2Xiaohu Lu (Nynas)H-Index: 27
Last. Francesco Canestrari (Marche Polytechnic University)H-Index: 28
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#1Suvash Chandra Paul (Monash University Malaysia Campus)H-Index: 20
#2Algurnon S. van Rooyen (Stellenbosch University)H-Index: 4
Last. Leslie F. Petrik (UWC: University of the Western Cape)H-Index: 33
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Abstract This review paper intends to synthesise the data published in the literature on the uses of different types of nanomaterials in cementitious materials. According to ASTM, depending on types, the size of nanoparticles varies from 1鈥痭m to 100鈥痭m. Application of nanomaterials in different sectors has shown that the properties of conventional materials can be significantly improved when nanoparticles are included. The addition of nanoparticles in cementitious materials can act as a filler a...
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#1Minghui Gong (Purdue University)H-Index: 2
#2Yang Jun (SEU: Southeast University)H-Index: 10
Last. John E. Haddock (Purdue University)H-Index: 19
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Carbon nanotubes (CNT) hold the potential to enhance the performance of construction materials such as asphalt binders and mixtures. With the goal of designing long-life asphalt pavements, this research report investigates the laboratory performance of CNT-modified asphalt. Mixing combination conditions including shearing time and shearing rate are studied in the first step. Then modified asphalts with different CNT contents are evaluated by penetration, softening point, and ductility indexes. S...
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#1Lorenzo Paolo Ingrassia (Marche Polytechnic University)H-Index: 8
#2Xiaohu Lu (Nynas)H-Index: 27
Last. Gilda Ferrotti (Marche Polytechnic University)H-Index: 18
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Abstract Warm Mix Asphalt (WMA) technologies allow reducing production, laying and compaction temperatures of bituminous mixtures, leading to relevant environmental and technical benefits. According to recent studies, some WMA additives lead to this temperature reduction by potentially improving the lubricating properties (i.e. the tribological behaviour) of the bituminous binder. In this study, the effect of a chemical and a wax additive on the tribological behaviour of two base bituminous bind...
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#1Umme Amina Mannan (UNM: University of New Mexico)H-Index: 10
#2Rafiqul A. Tarefder (UNM: University of New Mexico)H-Index: 24
Asphalt binder works as a binding by creating a thin film around the aggregate in asphalt pavement. Binder lubricity reduces the friction between aggregate particles and provides a better wear protection. Better wear protection prevents the degradation of pavement materials that occurs because of the traffic loading. Therefore, both proper compaction and surface interaction between the aggregates and asphalt binder are essential for enhanced long-term performance of the pavement. To explain surf...
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#1Francesco Canestrari (Marche Polytechnic University)H-Index: 28
#2Lorenzo Paolo Ingrassia (Marche Polytechnic University)H-Index: 8
Last. Xiaohu Lu (Nynas)H-Index: 27
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Abstract Kinetic friction is a physical phenomenon which originates when two or more bodies are in contact and in relative motion, and causes energy consumption and wear. Lubricants are widely used in many fields to reduce kinetic friction and their behaviour is usually characterized through appropriate tribological tests. In fact, the science of tribology (from the Greek word 鈥渢ribo鈥 that means to rub and the Latin word 鈥渓ogia鈥 that means study) investigates interactions between surfaces in rel...
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#1Mahyar Arabani (University of Gilan)H-Index: 19
#2Masoud Faramarzi (University of Gilan)H-Index: 5
Abstract The rheological properties and thermal sensitivity of asphalt binder directly affect the mechanical properties of hot mix asphalt (HMA) at different temperatures. Conducted researches have proved that nano materials can improve HMA鈥檚 properties as modifier, if well mixed in the asphalt binder. In this study some tests are done to compare functional properties of neat and carbon nanotubes (CNTs)-modified asphalt mixtures. As the first step, the morphology of the CNT-modified asphalt bind...
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#1Andrew Hanz (UW: University of Wisconsin-Madison)H-Index: 9
#2Hussain U. Bahia (UW: University of Wisconsin-Madison)H-Index: 53
The disconnect between estimated compaction temperatures on the basis of viscosity and behavior observed in laboratory- and field-compacted mixes indicates that the sole use of viscosity is insufficient to characterize the role of the asphalt binder in mixture compaction. The asphalt lubricity test was presented as a complement or replacement to viscosity on the basis of the concept that it was necessary to measure the properties of binders in thin films to relate better to compaction of mixes a...
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#1Yang Jun (SEU: Southeast University)H-Index: 10
#2Susan L. Tighe (UW: University of Waterloo)H-Index: 23
This paper reviews the advances in using nano-materials in hot mix asphalt. The clay nano-particles are the primary materials applying in asphalt construction. Adding nano-particles like nanoclay, nanosilica, and nanotubes in asphalts normally increase the viscosity of asphalt binders and improves the rutting and fatigue resistance of asphalt mixtures. Using nanoclay as the second modifier in polymer modified asphalts can improve the storage stability and the aging resistance of polymer modified...
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