Influence of Nanoparticles Modification on the Properties of Bitumen

2009 ◽  
Vol 614 ◽  
pp. 197-200 ◽  
Author(s):  
Shao Peng Wu ◽  
Gang Liu ◽  
Jin Gang Wang ◽  
Yuan Zhang
Keyword(s):  
High Temperature ◽  
Dynamic Viscosity ◽  
Inorganic Nanoparticles ◽  
Rheological Parameters ◽  
High Shear ◽  
Dynamic Shear ◽  
Shear Rates ◽  
Modify Bitumen ◽  
Modified Binders ◽  
Shear Rate Dependence

In this study, the influence of some inorganic nanoparticles on the properties of bitumen binder was investigated. Three types of particles at nanometer level, calcium carbonate powder, graphite and carbon black, were introduced to modify bitumen respectively. The modified binders were prepared using a laboratory high-shear mixer. A dynamic shear rheometer (DSR) was adopted to characterize the properties of modified binders, including their rheological parameters and dynamic viscosity, over a certain range sweeps of temperatures, frequencies and shear rates. It was found that the addition of the nanoparticles increased the binder’s elasticity at low temperature which might negatively influence its resistance to crack. However the decrease of phase angle at high temperature might improve its deformation resistance. The shear rate dependence of dynamic viscosity for the binders depended on the type of nanoparticle. The research results indicated that the addition of nanoparticles to bitumen binder can change its physical properties to some extent and its potential should be researched further.

Influence of Rubber Powder Content on High-Temperature Performance of TOR Rubber Asphalt

2013 ◽  
Vol 405-408 ◽  
pp. 1753-1756
Author(s):  
Yong Mei Guo ◽  
Wei Chen
Keyword(s):  
High Temperature ◽  
Critical Temperature ◽  
Dynamic Viscosity ◽  
Softening Point ◽  
Asphalt Binders ◽  
Rheological Parameters ◽  
Dynamic Shear ◽  
Rubber Powder ◽  
Temperature Performance ◽  
Powder Content

Six kinds of TOR rubber asphalts with 5%-30% rubber powder contents of were selected to carry out conventional high-temperature tests and dynamic shear rheological tests to obtain some parameters reflecting the high-temperature performance of asphalt binders, such as softening point, dynamic viscosity at 60°C, rutting factor (G*/sinδ) at 60°C and critical temperature of rutting factor (TG*/sinδ). The results show that the changing tendency of two rheological parameters of TOR rubber asphalts, G*/sinδ at 60°C and TG*/sinδ, is ascend in first and descend at last with the increase of rubber powder content proportion. The high-temperature performance of TOR rubber asphalt with the rubber powder content about 20% is the best. Softening point and dynamic viscosity at 60°C, as two conventional high-temperature parameters of asphalt binders, can describe the high-temperature performance of TOR rubber asphalt with the rubber powder content below 20%, but cannot evaluate accurately the high-temperature performance of TOR rubber asphalt with the rubber powder content above 20%, because TOR rubber asphalt has formed a network structure at this moment.

Capillary RheoSANS: measuring the rheology and nanostructure of complex fluids at high shear rates

Soft Matter ◽  
2020 ◽  
Vol 16 (27) ◽  
pp. 6285-6293
Author(s):  
Ryan P. Murphy ◽  
Zachary W. Riedel ◽  
Marshall A. Nakatani ◽  
Paul F. Salipante ◽  
Javen S. Weston ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Complex Fluids ◽  
Inorganic Nanoparticles ◽  
High Shear ◽  
Capillary Rheometry ◽  
Shear Rates ◽  
High Shear Rates

Capillary rheometry is combined with small-angle neutron scattering to simultaneously measure the viscosity and nanostructure of complex fluids containing proteins, surfactants, polymers, and inorganic nanoparticles at shear rates up to 106 s−1.

Rheology of Fluoride Gels

1976 ◽  
Vol 55 (3) ◽  
pp. 353-356 ◽  
Author(s):  
M. Braden ◽  
Ratna Perera
Keyword(s):  
Infrared Spectroscopy ◽  
Shear Rate ◽  
Elastic Behavior ◽  
Shear Stresses ◽  
High Shear ◽  
Shear Rates ◽  
Extreme Stress ◽  
Thickening Agents ◽  
Shear Rate Dependence ◽  
Low Shear

Six commercial fluoride gels have been studied, using a cone and plate viscometer. Also, the thickening agents have been analyzed using infrared spectroscopy. All gels showed stress thinning, which is the decrease of viscosity with shear rate. Such shear rate dependence is clinically convenient in that the gel will flow readily at the high shear stresses present when the gel is applied but will not flow readily under its own weight when on the tooth. Five materials containing hydroxyalkyl celluloses showed similar degrees of shear thinning. One material with a non-cellulosic thickener showed much more extreme stress thinning together with elastic behavior at low shear rates; such behavior may be clinically advantageous. All of the gels showed only slight temperature dependence of rheological properties.

scholarly journals Measurement techniques for steady shear viscosity of Mozzarella-type cheeses at high shear rates and high temperature

2015 ◽  
Vol 47 ◽  
pp. 102-108 ◽  
Author(s):  
Prateek Sharma ◽  
Tzvetelin T. Dessev ◽  
Peter A. Munro ◽  
Peter G. Wiles ◽  
Graeme Gillies ◽  
...  
Keyword(s):  
High Temperature ◽  
Shear Viscosity ◽  
Measurement Techniques ◽  
Steady Shear ◽  
High Shear ◽  
Shear Rates ◽  
Steady Shear Viscosity ◽  
High Shear Rates

scholarly journals Evaluation of Rheological Characteristics of Graphite Modified Bitumen

2021 ◽  
Vol 11 ◽  
pp. 51-57
Author(s):  
Odunayo Olayemi Oladunjoye ◽  
Olugbenga Joseph Oyedepo ◽  
Ebenezer Omoniyi Olukanni ◽  
Sombo Philiph Akande
Keyword(s):  
Shear Modulus ◽  
Phase Angle ◽  
Dynamic Viscosity ◽  
Loss Modulus ◽  
Rheological Parameters ◽  
Dynamic Shear ◽  
Complex Shear Modulus ◽  
Modified Bitumen ◽  
Dynamic Shear Rheometer ◽  
Complex Shear

The level of performance of asphalt concrete has a close relationship with the properties of bitumen used. This research evaluates the rheological parameters of graphite modified bitumen. Index properties tests were conducted on bitumen and graphite to determine their suitability. Dynamic viscosity and dynamic shear rheometer were conducted on bituminous binder modified with four different proportion of graphite ranging from 2% to 10% by bitumen weight. Dynamic viscosity test was conducted on bitumen and graphite modified bitumen at temperature of 1350C and 1650C using Brookfield Viscometer. The rheological properties are centered on phase angle (δ) and complex shear modulus (G*) which were determined on bitumen and graphite modified bitumen at temperature ranging from 520C – 700C at 10 rad/s frequency using Dynamic Shear Rheometer in accordance with ASTM D7175-15. The storage modulus (G'), loss modulus (G") and rutting parameters were then evaluated from phase angle and complex shear modulus. The bitumen and graphite modified bitumen showed that graphite modified bitumen has the highest complex shear modulus and rutting parameter of 8984 (kPa) and 33387 (kPa) at 10% graphite content. The results of viscosity helped to determine the mixing and compaction temperatures. Dynamic shear rheometer test results determined the elastic and viscous behaviour at various temperature. The higher the complex shear modulus and rutting parameter the stiffer the binder will resist deformation and rutting.

Effects of UV Aging on the High-Temperature and Fatigue Performances of Asphalt Mortar

2011 ◽  
Vol 306-307 ◽  
pp. 1698-1701 ◽  
Author(s):  
Ling Pang ◽  
Lu Long ◽  
Shao Peng Wu ◽  
Wan Lu
Keyword(s):  
High Temperature ◽  
Film Thickness ◽  
Uv Radiation ◽  
Dynamic Viscosity ◽  
Aging Temperature ◽  
Pavement Performance ◽  
Dynamic Shear ◽  
Uv Aging ◽  
Main Factors ◽  
Asphalt Mortar

Ultraviolet(UV) radiation is one of the main factors induce asphalt aged in the field in-service. Asphalt mortar greatly affects the pavement performance. It is scarce that studies concerning UV aging on the performance of asphalt mortar. In this paper, asphalt mortar with a 1.0 F/A (filler to asphalt)after UV aging were subjected to the test of the Dynamic Shear Rheometer (DSR).Effects of UV aging on the High-Temperature and fatigue performances of asphalt mortar were studied by using the rutting parameter G*/sinδ, fatigue parameter G*sinδ and dynamic viscosity. The results show UV aging had prominent effect on asphalt mortar’s properties, with the decrease of film thickness and increase of UV aging temperature, the ability of rut resistance enhances and fatigue performance weakens.

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