Use of Polymer Nanocomposites in Asphalt Binder Modification

Gulzar, Saqib; Underwood, B. Shane

doi:10.1002/9781119605843.ch14

Cited by 6 publications

(3 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A concerted research input is required for utilization, storage, and effective conversion of renewable sources of energy 2 . Recent progress in nanotechnology has made a significant impact for its possible inclusion in various engineering, industrial, and biomedical applications 3‐7 …”

Section: Introductionmentioning

confidence: 99%

“…1 A concerted research input is required for utilization, storage, and effective conversion of renewable sources of energy. 2 Recent progress in nanotechnology has made a significant impact for its possible inclusion in various engineering, industrial, and biomedical applications [3][4][5][6][7] with momentous focus on energy sector. 8 Exploiting nanotechnology can help in effective use of renewable sources of energy.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors

2020

View full text Add to dashboard Cite

Summary Hybrid nanofluids with Therminol‐55 as base fluid and TiO2 and Al2O3 as nano additives are investigated for parabolic trough collectors. Stable mono nanofluids based on Therminol‐55 with Al2O3 and TiO2 nanoparticles, and hybrid Al2O3–TiO2 nanopowder as additives are prepared by the two‐step method. Oleic acid has been made as a surfactant. The impact of nanoparticle content and fluid temperature on thermal conductivity was studied using the transient hot‐wire technique. Thermal conductivity exhibited an increase with an increase in both temperature and nanoparticle concentration. Al2O3–TiO2 Therminol‐55 hybrid nanofluids exhibit the highest increase of 33.5% in thermal conductivity followed by 27.06% in Al2O3–Therminol‐55, and lowest rise of 21% is found in TiO2–Therminol‐55 nanofluids. Synergetic effect of Al2O3 and TiO2 nanoparticles, increased Brownian motion, and filling of vacant spaces by smaller‐sized TiO2 nanoparticles in Al2O3–TiO2 hybrid nanofluids lead to effective thermal network for enhanced thermal conductivity. Maximum thermal conductivity of 0.15 W/m‐K is observed in the case of hybrid Al2O3–TiO2 Therminol‐55 nanofluid with 0.5 wt% concentration. Augmented thermal conductivity of HNF's leads to the efficient photothermal conversion in concentrating solar collectors. Further, a correlation for thermal conductivity with variation in nanoparticle content and the fluid temperature is proposed with R2 = 0.92.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors

2020

View full text Add to dashboard Cite

show abstract

“…Shan et al proposed a LAOS protocol to evaluate nonlinear rheological behavior of asphalt binders and employed Fourier-transform (FT) rheology and strain decomposition methods to analyze the results ( 18 ). The authors suggested considering LAOS framework for evaluating rheological performance properties for polymer-nanocomposite modified asphalt binders ( 19 ). These studies showcase the applicability of LAOS in asphalt binder research, but many aspects still need to be addressed and /or further researched.…”

mentioning

confidence: 99%

Nonlinear Viscoelastic Response of Crumb Rubber Modified Asphalt Binder Under Large Strains

Gulzar

Underwood

2020

Transportation Research Record

Self Cite

View full text Add to dashboard Cite

Agencies have been increasing their use of polymer modified asphalt binders in recent years to address performance issues and lengthen the useful life of their pavements. When deployed these materials likely experience strain levels exceeding their linear viscoelastic (LVE) limits. The same situation exists in non-polymer modified asphalt binders as well, but the effect may be more pronounced in polymer modified systems because of their bi-phasic nature. In this study, terminally blended crumb rubber (CR-TB) modified asphalt is studied to understand and quantify the nonlinear viscoelastic response under large strains. The CR-TB binders are extensively used in pavements subjected to high vehicular loads and extreme climatic conditions; thereby, their response under large strains becomes more critical. The current standard characterization techniques are based on LVE response using small amplitude oscillatory shear rheology only and do not consider the behavior of binders under large strains. In this study, large amplitude oscillatory shear (LAOS) rheology is used as a framework to more thoroughly investigate the complete response of the CR-TB modified asphalt binder under large strains at 30°C, 40°C, 50°C, and 60°C and at the frequencies of 0.5, 1, and 5 Hz. The LAOS response is analyzed using Fourier-transform rheology and the orthogonal stress decomposition method involving Chebyshev polynomial representation. It is found that nonlinearity manifests greatly in this study material as strain levels increase and frequencies decrease. The relative nonlinearity increases with increasing strain amplitude and is more significant towards lower end of the tested temperature range. The CR-TB binder shows strain-stiffening/softening and shear-thinning/thickening behavior depending upon a specific temperature, strain level, and frequency.

show abstract

Experimental Analysis of Portable Optical Solar Water Heater

Ali

Gulzar

Karanth

et al. 2021

Lecture Notes in Mechanical Engineering

View full text Add to dashboard Cite

Use of Polymer Nanocomposites in Asphalt Binder Modification

Cited by 6 publications

References 36 publications

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors

Nonlinear Viscoelastic Response of Crumb Rubber Modified Asphalt Binder Under Large Strains

Experimental Analysis of Portable Optical Solar Water Heater

Contact Info

Product

Resources

About

Use of Polymer Nanocomposites in Asphalt Binder Modification

Cited by 6 publications

References 36 publications

Experimental study on thermal conductivity of mono and hybrid Al 2 O 3 –TiO 2 nanofluids for concentrating solar collectors

Experimental study on thermal conductivity of mono and hybrid Al 2 O 3 –TiO 2 nanofluids for concentrating solar collectors

Nonlinear Viscoelastic Response of Crumb Rubber Modified Asphalt Binder Under Large Strains

Experimental Analysis of Portable Optical Solar Water Heater

Contact Info

Product

Resources

About

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors