Effects of Graphite on Mechanical Properties of Stone Mastic Asphalt Pavement

Kök, Baha Vural; Yılmaz, Mehmet; Erkuş, Yunus

doi:10.3846/13923730.2017.1374302

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…For a long time, researchers and chemists have conducted studies on modified bitumen. These studies were focused on the industrial utilization of graphite, specific fillers, mineral fibers, plastomers, elastomers and rubbers for bitumen modification [4][5][6][7]. The most commonly used modifiers are polymers [8].…”

Section: Introductionmentioning

confidence: 99%

Effects of Mixing Temperature on the Mechanical Properties of Hot Mix Asphalt

et al. 2019

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In this study, the effects of mixing temperature on the performance of hot mix asphalt (HMA) were investigated. 5% Styrene-butadiene-styrene (SBS) and 18% America Gilsonite were used as binder modifiers. HMA samples were prepared at the mixing temperatures 10°C, 15°C, and 20°C lower temperatures than the mixing temperature. Marshall Stability and flow, resistance to moisture-induced damage and indirect tensile fatigue tests were conducted on the hot mix asphalt samples. As a result of the experimental study, it was observed that use of additives increased the performance of the HMAs. In addition, it was seen that, in general, the stability, Marshall quotient, indirect tensile strength and fatigue life of the mixtures decreased and the flow values increased with decreasing mixing temperature.

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Section: Introductionmentioning

confidence: 99%

Effects of Mixing Temperature on the Mechanical Properties of Hot Mix Asphalt

et al. 2019

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“…Graphite lowers marshall stability values so that the application of graphite to paved mixtures is not widely developed (Kök et al, 2017) [4].…”

Section: Methodsmentioning

confidence: 99%

Characteristics of Hotmix Ac-Bc With Nanographene Filler

Shalahuddin¹,

Anon²,

Anon³

et al. 2021

International Journal of Civil Engineering and Technology (Ijciet)

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This study analyzes the influence of the addition of graphene nano-material as filler on asphalt concrete base course (AC-BC). Triple layer on carbon graphene structure serves as a strengthening to improve the stability of hotmix AC-BC significantly. It is important to know how accumulation of graphene nano-material fiber sheet that has a very wide surface (m2/gr) with bitumen. Testing was conducted with a combination of graphene 0 %, 3.5 %, 4 %, and 4.5 % by asphalt weight. The results showed that addition graphene decreases the penetration of asphalt from 60 mm to 53.6 mm, decreases the value of optimum asphalt 1.75 %, improves stability from 1,260 kg to 1,480 kg, increase flow / elasticity from 3.80 mm to 4.50 mm, decrease void in mix (VIM) 10.95 %, increases void filled asphalt (VFA) 2.10 %, and increases void in mix asphalt (VMA) 3.77 %. It is phenomenal that nanographene on AC-BC hotmixs can increase strength while also improving elasticity.

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“…The production of dispersions was accomplished by using 1000 mL-cylindrical aluminum cans, which were filled with approximately 600 g of fluid bitumen and gradually heated to reach 175 • C [44][45][46]. At this temperature, various concentrations of powdered spent graphite (e.g., 5, 10, and 15 wt.% SG by total weight of the blend) were stepwise administered into the neat bitumen [47,48]. These lower, intermediate, and higher concentrations were intentionally selected to see clearly and closely the direct effect of SG on the physicochemical and rheological properties of base AP-5 asphalt.…”

Section: Preparation Of Spent Graphite (Sg)-asphalt Masticsmentioning

confidence: 99%

“…These lower, intermediate, and higher concentrations were intentionally selected to see clearly and closely the direct effect of SG on the physicochemical and rheological properties of base AP-5 asphalt. Additionally, it has been reported that 15 wt.% of pure graphite is optimum and could deliver promising improvement in the engineering properties of asphalt mixtures [48]. To nicely obtain homogenous mixtures, the untreated and SG-treated asphalt samples were stirred for 2 h at 180 • C [44][45][46].…”

Section: Preparation Of Spent Graphite (Sg)-asphalt Masticsmentioning

confidence: 99%

Spent Graphite from End-of-Life Lithium-Ion Batteries (LIBs) as a Promising Nanoadditive to Boost Road Pavement Performance

2021

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To take swift action towards tackling the global pollution crisis of discarded lithium-ion batteries (LIBs) while reinforcing road structures, this investigation was undertaken. The influence of various proportions of spent graphite (e.g., 5, 10, and 15 wt.% SG), harvested from end-of-life LIBs, on the performance of base AP-5 asphalt cement was studied. Multiple laboratory techniques have been employed to characterize the internal physiochemical interaction between the additive and the binder. These techniques include: elemental analysis (EA), thin-layer chromatography-flame ionization detection (TLC-FID), Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), empirical test methods (e.g., penetration, softening point, viscosity, and ductility), dynamic shear rheometer (DSR), and multiple stress-creep recovery (MSCR). Prior to aging, SARA analysis demonstrated that the incremental SG addition into the AP-5 bitumen reduced the contents of saturates, aromatics, and resins, and increased the proportion of asphaltenes. After aging, the saturated and aromatic hydrocarbons kept decreasing; however, the resins increased and the asphaltenes declined. Accordingly, this has brought a progressive shift tendency in the stable–colloidal system for all binders from sol-state towards sol-gel-state. FT-IR scan revealed that the SG has no apparent chemical interaction with the binder, and is endowed solely with filling effects. XRD diagnosis highlighted that the steady SG incorporation into the binder amplified its crystallinity; thereby boosting the thermomechanical properties of mastics. SEM imaging unveiled that the lower-dose of SG exhibited higher compatibility within the bitumen matrix; nevertheless, the intermediate/higher-doses made the binder body relatively rougher. DSR/MSCR/conventional tests indicated that when the asphalt is blended with the graphitic powder under unaged/aged conditions, it becomes stiffer, more viscous, and less cohesive; thereby rendering it more resistant to deformation but not to cracking. In summary, it is promisingly proven that the SG could be successfully used as an asphalt additive and could be beneficial for improving paving performance and mitigating the pollution caused by dead LIBs as well.

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Effects of Graphite on Mechanical Properties of Stone Mastic Asphalt Pavement

Cited by 12 publications

References 20 publications

Effects of Mixing Temperature on the Mechanical Properties of Hot Mix Asphalt

Effects of Mixing Temperature on the Mechanical Properties of Hot Mix Asphalt

Characteristics of Hotmix Ac-Bc With Nanographene Filler

Spent Graphite from End-of-Life Lithium-Ion Batteries (LIBs) as a Promising Nanoadditive to Boost Road Pavement Performance

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