Effects of reclaimed asphalt binder on rheological properties and cohesion energy of crumb rubber modified binder

2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Shashibhushan Girimath ◽  
Dharamveer Singh ◽  
Evangelos Manthos ◽  
W. K. Mampearachchi
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Cohesion Energy ◽  
Reclaimed Asphalt ◽  
Modified Binder

Effect of used motor oil as a rejuvenator on crumb rubber modifier’s released components to asphalt binder

2020 ◽  
pp. 147776062091860
Author(s):  
Eslam Deef-Allah ◽  
Magdy Abdelrahman
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Motor Oil ◽  
Modified Asphalt ◽  
Synthetic Rubber ◽  
Used Motor Oil ◽  
C 50 ◽  
Modified Binder ◽  
Molecular Weight Fractions

Asphalt binder modification by crumb rubber modifier (CRM) could enhance its rheological properties at high and intermediate temperatures by increasing its stiffness and elasticity. To obtain a modified binder blend with more enhanced intermediate- and low-temperature rheological properties, used motor oil (UMO) was introduced to the crumb rubber-modified asphalt (CRMA) binder. The enhanced high- and intermediate-temperature rheological properties of the modified binders were investigated using a temperature sweep test. UMO, used as a rejuvenator, can regulate the CRM role in the modified binder blend by creating a balance between the binder’s enhanced stiffness and fluidity. This was achieved by increasing |G*|/sin δ at high temperatures and decreasing |G*|.sin δ at intermediate temperatures. The mutual components between the CRM and the asphalt binder were explored by thermogravimetric analysis and Fourier transform infrared (FTIR) spectroscopy. UMO was found to have similar FTIR bands of the asphalt binder that helped the CRM particles to absorb more low-molecular-weight fractions at the beginning of the interaction time, which caused them to swell more and then dissolve, releasing their polymeric components in the asphalt binder’s liquid phase. Adding UMO with two and half percentage by the weight of the neat asphalt binder to the CRMA binder, interacted at 190°C–50 Hz–60 min, could increase the CRM dissolution and cause a greater release of CRM polymeric components into the asphalt binder matrix. This was assured by the presence of FTIR peaks at 911 and 966 cm−1 that are related to the polybutadiene, synthetic rubber in CRM.

RHEOLOGICAL BEHAVIOUR OF COCONUT SHELL POWDER MODIFIED ASPHALT BINDER

2016 ◽  
Vol 78 (7-3) ◽  
Author(s):  
Rosnawati Buhari ◽  
Nur Fareesya Zabidi ◽  
Mohd Ezree Abdullah ◽  
Siti Khatijah Abu Bakar ◽  
Nurul Hidayah Mohd Kamarudin
Keyword(s):  
Rheological Properties ◽  
Softening Point ◽  
Asphalt Binder ◽  
Rheological Behaviour ◽  
Coconut Shell ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Modified Binder ◽  
Coconut Shell Powder ◽  
Shell Powder

The objectives of this study were to determine the blending parameters of coconut shell powder (CSP) modified asphalt binder and to evaluate the rheological properties of CSP modified asphalt binder. CSP of 2%, 4%, 6%, 8% and 10% by weight of asphalt have been incorporated into an unaged 80/100 asphalt mix in order to improve its performance. The influence of the additives on the physical and rheological properties was evaluated with penetration test, softening point, storage stability, dynamic shear rheometer test (DSR), and Field Emission Scanning Electron Microscope (FESEM). The aging of asphalt binders was simulated in a laboratory by using Rotational Thin Film Oven (RTFO). The results showed that the addition of CSP into virgin binder was decreasing the penetration value and increasing the softening point temperature compared to the original binder. On the rheological effect, for unaged modified binder, higher CSP resulted higher G*/sin δ especially at lower temperature compared to the unaged control binder. Besides, for the aged modified binder, stiffness was lower than the control aged binder for all temperature.

scholarly journals Physical and rheological properties of nano zinc oxide modified asphalt binder

2018 ◽  
Vol 250 ◽  
pp. 02004
Author(s):  
Khairul Nizam Mohd Yunus ◽  
Mohd Ezree Abdullah ◽  
Mohd Khairul Ahmad ◽  
Nurul Hidayah Mohd Kamaruddin ◽  
Haniffah Tami
Keyword(s):  
Zinc Oxide ◽  
Rheological Properties ◽  
Softening Point ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Zinc Nitrate ◽  
Rutting Resistance ◽  
Nano Zinc Oxide ◽  
Modified Binder ◽  
Nano Zinc

The main objectives of this work were to investigate the physical and rheological properties of nano zinc oxide (NaZO) flake structure as a modifier in asphalt binder. NaZO was produced with hydrothermal method by using two precursors, which are zinc nitrate and sodium hydroxide. NaZO was mixed with virgin binder 60/70 penetration grade at 3%, 5% and 7% of asphalt binder weight, respectively. The physical properties were evaluated by conventional testing, such as penetration, softening point and viscosity. Meanwhile, the rheological property, such as rutting resistance, was measured by using a dynamic shear rheometer (DSR) for unaged and rolling thin film oven (RTFO) aged. It was observed that the penetration value was decreased and the softening point increased with increasing NaZO concentrations. In addition, the rutting resistance factor was increased for the modified binder. A comparison between the modified binder, 7% NaZO, showed a greater resistance to rutting before and after aging. Results of this study showed that the NaZO addition had increased the asphalt binder stiffness ; thus, could contribute to better resistance to permanent deformation.

scholarly journals Effect of Various Metal Hydroxide Flame Retardants on the Rheological Properties of Asphalt Binder

2019 ◽  
Vol 25 (3) ◽  
pp. 348-355
Author(s):  
Lingzhu GU ◽  
Tianhang ZHANG ◽  
Kai ZHU ◽  
Daquan TANG ◽  
Ke WU
Keyword(s):  
Rheological Properties ◽  
Flame Retardants ◽  
Asphalt Binder ◽  
Thermal Cracking ◽  
Hydrated Lime ◽  
Metal Hydroxide ◽  
Rutting Resistance ◽  
Tunnel Fire ◽  
Aging Resistance ◽  
Modified Binder

Metal hydroxide has been widely used as flame retardant to reduce the hazards of tunnel fire, however, few researches investigate its effect on the rheological properties of asphalt binder systemically. This study explores and compares the effect and mechanisms of magnesium hydroxide (MH), aluminium hydroxide (ATH), hydrated lime (HL), and layer double hydroxides (LDHs) on the rutting resistance, anti-aging resistance, as well as the thermal cracking resistance of asphalt binder. Rotational viscosity (RV) test, dynamic shear rheometer (DSR) test, and bending beam rheometer (BBR) test are involved in the project. Test results indicate: (1) the addition of metal hydroxide generally improves the rutting resistance of asphalt binder during high temperatures due to the typical filler effect, while weakens the resistance to thermal cracking of binder at low temperatures because of the stress concentration; (2) HL and LDHs enhance the anti-aging resistance of asphalt binder; (3) LDHs modified binder, which is proved with better rheological properties, including great rutting resistance, anti-aging resistance and passable resistance to thermal cracking, is recommended for further use. However, the high procurement price is still a big obstacle for its wider application. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.21572

scholarly journals Optical Characterization of Asphalt Binders Containing Wax Additives

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Mithil Mazumder ◽  
Raju Ahmed ◽  
Moon-Sup Lee ◽  
Soon-Jae Lee
Keyword(s):  
Optical Properties ◽  
Aging Process ◽  
Significant Contribution ◽  
Asphalt Binder ◽  
Optical Characterization ◽  
Crumb Rubber ◽  
Asphalt Binders ◽  
Oxidative Aging ◽  
Modified Binder

In between thermal-oxidative (heat and oxygen) and photo-oxidative (ultraviolet irradiation and oxygen) aging process of bitumen, photo-oxidative aging mainly depends on the optical properties of the asphalt binder. The higher the reflection (or the lower the absorption of the binders), the better the pavement serviceability. The literature review indicates that there is limited research conducted on the optical properties of the binder with wax additives. In this paper, the optical properties of commonly used binders (PG 64-22, Rubber modified binder, and SBS modified binder) containing wax additives (LEADCAP and Sasobit) were investigated using UV-Vis spectrometer. The result of this study showed that (1) the addition of modifiers (crumb rubber and SBS) with the base binder slightly increases the absorption of the binder; (2) the binder types and aging level have significant contribution on optical properties; (3) in general, the aged binders were observed to have higher reflectivity compared to the unaged binders; and (4) the addition of wax additives is observed to have a significant effect on the optical properties.

scholarly journals The effect of crumb rubber on the physical and rheological properties of modified binder

2018 ◽  
Vol 1049 ◽  
pp. 012099
Author(s):  
Siti Khatijah Abu Bakar ◽  
Mohd Ezree Abdullah ◽  
Mazlina Mustafa Kamal ◽  
Raha Abd Rahman ◽  
Rosnawati Buhari ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Crumb Rubber ◽  
Modified Binder
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