scholarly journals Laboratory Evaluation of Rheological Properties of Asphalt Binder Modified by Nano-TiO2/CaCO3

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Liming Zhang ◽  
Xuekai Gao ◽  
Wensheng Wang ◽  
Hua Wang ◽  
Kunkun Zheng
Keyword(s):  
Rheological Properties ◽  
Temperature Sensitivity ◽  
Asphalt Binder ◽  
Laboratory Evaluation ◽  
Modified Bitumen ◽  
Nano Tio2 ◽  
Medium Temperature ◽  
Stiffness Modulus ◽  
Desirability Analysis ◽  
Beam Bending

Nanomaterials have a great potential for enhancing the performance of base asphalt binder. This study aims to promote the application of nano-TiO2/CaCO3 in bitumen and presents a study on rheological properties for TiO2/CaCO3 nanoparticle-bitumen. In this study, a series of laboratory experiments have been performed for bitumen with different nano-TiO2/CaCO3 dosages. Nano-TiO2/CaCO3-modified bitumen with optimum dosage was prepared for viscosity, dynamic shear rheometer (DSR), and beam bending rheometer (BBR) for assessing temperature sensitivity of bitumen, and the low-medium-high-temperature performances were analyzed for TiO2/CaCO3 nanoparticle-bitumen as well. Results show that bituminous mechanical properties were enhanced by TiO2/CaCO3, and based on the overall desirability analysis of various conventional tests, the reasonable dosage of nano-TiO2/CaCO3 was recommended as 5% by weight of base bitumen. Adding nano-TiO2/CaCO3 was beneficial to improve the viscosity and reduce the temperature sensitivity of bitumen. The capacities of bituminous rutting resistance as well as medium-temperature fatigue resistance were enhanced by the addition of nano-TiO2/CaCO3. However, BBR test shows that bituminous anticracking is reduced slightly. On this basis, the Burgers model is selected for clarifying the decrease in anticracking performance; that is, nano-TiO2/CaCO3 increased the stiffness modulus while increasing the viscosity of bitumen.

The Influence of Hydrated Lime, Portland Cement and Cement Dust on Rheological Properties of Recycled Cold Mixes with Foamed Bitumen

2017 ◽  
Author(s):  
Przemysław Buczynski ◽  
Marek Iwanski
Keyword(s):  
Portland Cement ◽  
Rheological Properties ◽  
Complex Modulus ◽  
Hydrated Lime ◽  
Laboratory Evaluation ◽  
Cement Kiln ◽  
Direct Tension ◽  
Stiffness Modulus ◽  
Hydraulic Binder ◽  
Foamed Bitumen

This article presents a laboratory evaluation of the viscoelastic properties of recycled base courses produced with different fillers. The aim of this study was to investigate the influence of loading time and temperature on the complex modulus (E*) and the phase angle (6) of recycled base courses with respect to selected additives used. The mixtures contained reclaimed asphalt pavement RAP, crushed stone from existing base courses and virgin aggregate. Foamed bitumen 50/70 at 2.5% was used as a binder. The hydraulic binder constituted 3.0% of the recycled base course mixture. Portland cement, hydrated lime and cement kiln dust CKD were added as fillers. Evaluation of rheological properties of recycled base courses according to selected additives was carried out to the procedure set out in EN 12697-26 annex D. The evaluation of stiffness modulus was conducted in the direct tension- compression test on cylindrical samples (DTC-CY). The samples were subjected to the cycles of sinusoidal strain with an amplitude Bo < 25μB. All tests were performed over a range of temperatures (5 ºC, 13 ºC, 25 ºC, 40 ºC) and loading times (0.1 Hz, 0.3 Hz, 1 Hz, 3 Hz, 10 Hz, 20 Hz). The results were used to model stiffness modulus master curves of the recycled base courses containing selected additives in the hydraulic binder.

scholarly journals Rheological Properties and Application of Molasses Modified Bitumen in Hot Mix Asphalt (HMA)

2020 ◽  
Author(s):  
Werku Hareru ◽  
Tewodros Ghebrab
Keyword(s):  
Rheological Properties ◽  
Test Performance ◽  
Structural Integrity ◽  
Hot Mix Asphalt ◽  
Asphalt Binder ◽  
High Volume ◽  
Treatment Method ◽  
Partial Replacement ◽  
Creep Recovery ◽  
Modified Bitumen

The high volume of water in molasses has made this study serious. The reason is that using molasses as a partial replacement without treatment significantly affects the rheological properties of the neat bitumen and increases the likelihood of moisture susceptibility of the hot-mix asphalt (HMA) pavement structure and create fractures of aggregate particles. Therefore, to use molasses as a partial replacement without affecting the structural integrity of the pavement, this study proposed a treatment method before blending it with petroleum-based bitumen. A series of experiment was conducted to accomplish the objective of this paper, including convectional tests, Fourier transform infrared (FTIR) test, amplitude and frequency sweep test, performance grade (PG) determination test, and multiple stress creep recovery (MSCR) tests. The IR spectra show that carbonyl index decreased with increasing molasses percent. There was PG improvement from the control grade to PG64 and PG70 when the base binder modified with 5-20% molasses and aged with rollingl thin film oven (RTFO) respectively. At the temperature 58oC nonrecoverable creep compliance at 3.2 kPa (Jnr3.2kPa) was decreased for each percent replacement. This led to improving the rutting potential. As well, at a temperature of 64oC the Jnr value was decreased only for 5% replacement, and then the Jnr value was gradually increased for the remaining percent replacement. Overall, this study revealed that treated molasses can be used as a partial replacement to enhance the rheological properties of the base bitumen and thus it can potentially be used to produce a sustainable bio-asphalt binder.

Laboratory evaluation on the high temperature rheological properties of rubber asphalt: a preliminary study

2012 ◽  
Vol 39 (10) ◽  
pp. 1125-1135 ◽  
Author(s):  
Hainian Wang ◽  
Zhanping You ◽  
Shu Wei Goh ◽  
Peiwen Hao ◽  
Xiaoming Huang
Keyword(s):  
High Temperature ◽  
Rheological Properties ◽  
Rubber Particle ◽  
Asphalt Binder ◽  
Field Performance ◽  
Crumb Rubber ◽  
Testing Temperature ◽  
Asphalt Mixtures ◽  
Laboratory Evaluation ◽  
Loading Frequency

Crumb rubber is the recycled rubber particle obtained from mechanical shearing or grinding scrap tires into small particle sizes less than 6.3 mm (or approximately 1/4”). The rheological properties of asphalt binder have an important effect on the field performance of asphalt mixtures and the long-term serviceability of asphalt pavement. The objective of this research is to evaluate the high temperature rheological performance of rubber asphalt binder based on the complex shear modulus (|G*|) and the phase angle (δ) values using the dynamic shear rheometer. Five rubber asphalt dosages at 0, 10, 15, 20, and 25% by weight of asphalt (Superpave PG 64-22), respectively, were used to modify asphalt binder; and three rubber particle meshes, 20#, 30#, and 40#, were utilized in this research. The |G*| at various temperatures and frequencies were tested on each sample, including original and short-term aging binder using the rolling thin-film over. The master curves of |G*|/sin(δ) for each type of rubber asphalt was generated to investigate its rheological properties over a broad range of temperatures and frequencies. Based on the testing results, it was found that the addition of crumb rubber significantly increases the |G*| of asphalt binder, which is desirable to potentially improve the anti-rutting performance of asphalt mixtures. It was also found that the addition of 10% mesh crumb rubbers bumps up the high temperature grade of asphalt, from PG64 to PG76 in this case. The master curve using the |G*|/sin(δ) of rubber asphalt shows a substantial improvement in rutting resistant at each testing temperature and loading frequency. However, it was noteworthy that the rutting resistance enhancement of crumb rubber was affected by the percentage of rubber used, the rubber particle size and its aging condition.

scholarly journals Physicochemical and Rheological Properties of a Transparent Asphalt Binder Modified with Nano-TiO2

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2152
Author(s):  
Iran Rocha Segundo ◽  
Salmon Landi ◽  
Alexandros Margaritis ◽  
Georgios Pipintakos ◽  
Elisabete Freitas ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Softening Point ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Solar Irradiation ◽  
Creep Recovery ◽  
Polymer Modification ◽  
Nano Tio2 ◽  
Rutting Resistance ◽  
Multiple Stress Creep Recovery

Transparent binder is used to substitute conventional black asphalt binder and to provide light-colored pavements, whereas nano-TiO2 has the potential to promote photocatalytic and self-cleaning properties. Together, these materials provide multifunction effects and benefits when the pavement is submitted to high solar irradiation. This paper analyzes the physicochemical and rheological properties of a transparent binder modified with 0.5%, 3.0%, 6.0%, and 10.0% nano-TiO2 and compares it to the transparent base binder and conventional and polymer modified binders (PMB) without nano-TiO2. Their penetration, softening point, dynamic viscosity, master curve, black diagram, Linear Amplitude Sweep (LAS), Multiple Stress Creep Recovery (MSCR), and Fourier Transform Infrared Spectroscopy (FTIR) were obtained. The transparent binders (base and modified) seem to be workable considering their viscosity, and exhibited values between the conventional binder and PMB with respect to rutting resistance, penetration, and softening point. They showed similar behavior to the PMB, demonstrating signs of polymer modification. The addition of TiO2 seemed to reduce fatigue life, except for the 0.5% content. Nevertheless, its addition in high contents increased the rutting resistance. The TiO2 modification seems to have little effect on the chemical functional indices. The best percentage of TiO2 was 0.5%, with respect to fatigue, and 10.0% with respect to permanent deformation.

scholarly journals A Review on Improving Asphalt Pavement Service Life Using Gilsonite-Modified Bitumen

2021 ◽  
Vol 13 (12) ◽  
pp. 6634
Author(s):  
Hayder Al Hawesah ◽  
Monower Sadique ◽  
Clare Harris ◽  
Hassan Al Nageim ◽  
Karl Stopp ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Hot Mix Asphalt ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Binders ◽  
Modified Bitumen ◽  
Dry Process ◽  
Modified Asphalt ◽  
Wet Process

Hot mix asphalt has various benefits such as good workability and durability. It is one of the most general materials used as asphalt mixtures in road pavements. Asphalt mixtures and binders can be improved by modifying them with various additives. Gilsonite is a natural asphalt hydrocarbon which may be used as an additive to hot mix asphalt. It is used as an asphalt binder modifier (wet process) and an asphalt mixture modifier (dry process) to improve the properties of the mix. It provides the option of improved rheological properties, stability, strength rutting resistance and moisture sensitivity. This paper examines the current research relating to the use of gilsonite to improve the asphalt properties (binder and mixture). The rheological properties of the modified asphalt binders and mechanical properties of the modified asphalt mixtures will be reviewed. The influence of adding gilsonite individually or combined with other additives will be discussed. Furthermore, assessment of the environmental and economic perspectives of the studied asphalt along with some suggestions to improve the asphalt binders and mixtures will be explored.

Rheological properties of asphalt binder modified by nano-TiO2/ZnO and basalt fiber

2022 ◽  
Vol 320 ◽  
pp. 126323
Author(s):  
Zhen Fu ◽  
Yujie Tang ◽  
Feng Ma ◽  
Yujie Wang ◽  
Ke Shi ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Asphalt Binder ◽  
Basalt Fiber ◽  
Nano Tio2

scholarly journals Physicochemical and Rheological Properties of A Transparent Asphalt Binder Modified with Nano-TiO2

2020 ◽  
Author(s):  
Iran Rocha Segundo ◽  
Salmon Landi Jr. ◽  
Alexandros Margaritis ◽  
Georgios Pipintakos ◽  
Elisabete Freitas ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Softening Point ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Solar Irradiation ◽  
Creep Recovery ◽  
Polymer Modification ◽  
Nano Tio2 ◽  
Rutting Resistance ◽  
Multiple Stress Creep Recovery

Transparent binder is used to substitute conventional black asphalt binder and to provide light-colored pavements, whereas nano-TiO2 has the potential to promote photocatalytic and self-cleaning properties. Together, these materials provide multifunction effects and benefits when the pavement is submitted to high solar irradiation. This paper analyses the physicochemical and rheological properties of a transparent binder modified with 0.5%, 3.0%, 6.0%, and 10.0% of nano-TiO2 and compares it to the transparent base binder, and conventional and polymer modified binders (PMB) without nano-TiO2. Their penetration, softening point, dynamic viscosity, master curve, black diagram, Linear Amplitude Sweep (LAS), Multiple Stress Creep Recovery (MSCR), and Fourier-Transform Infrared Spectroscopy (FTIR) were obtained. The transparent binders (base and modified) seem to be workable considering their viscosity and exhibited values between the conventional binder and PMB regarding rutting resistance, penetration, and softening point. They showed similar behavior as the PMB, demonstrating signs of polymer-modification. The addition of TiO2 seems to reduce fatigue life, except for the 0.5% content. Nevertheless, its addition in high contents increases the rutting resistance. The TiO2 modification seems to have little effect on the chemical functional indices. The best percentage of TiO2 was 0.5%, considering fatigue and 10.0% concerning permanent deformation.

Investigating the influence of carbon nanotube on the performance of asphalt binder

2021 ◽  
pp. 147776062110194
Author(s):  
Peerzada Mosir Shah ◽  
Mohammad Shafi Mir
Keyword(s):  
High Temperature ◽  
Asphalt Binder ◽  
Storage Condition ◽  
Modified Bitumen ◽  
Creep And Recovery ◽  
Low Viscosity ◽  
Temperature Performance ◽  
Modified Asphalt Binder ◽  
Viscosity Grade ◽  
The Impact

The purpose of this study aims at investigating the impact of multi-walled carbon nanotubes (MWCNT’s) on the properties of low viscosity grade asphalt binder. Asphalt binder with viscosity grade-10 is selected as the control binder and later it is modified with different percentages of MWCNT’s (0.5–2.5%). Penetration, softening point, ductility and rotational viscosity test were employed for evaluating the effect of MWCNT’s on basic physical properties of modified asphalt binder. Dynamic Shear Rheometer (DSR) is used for evaluating the rheological properties of the base and modified bitumen, for both aged and unaged bitumen. Based on the conventional and basic rheological tests, it was seen that the addition of MWCNT’s improved the high-temperature performance of modified bitumen. Multiple Stress Creep and Recovery (MSCR) test results revealed that the addition of MWCNT’s improved the creep and recovery of modified binders for both stress intensities (0.1 kPa and 3.2 kPa) which confirms that the modified binder is more rut resistant. Moreover, it was observed that there was a significant improvement in the aging resistance of the asphalt binder due to addition of MWCNTs. However low temperature performance of MWCNTs was not encouraging. Also, MWCNTs addition to asphalt binder was found to be stable under high-temperature storage condition. Overall, there is a significant amount of improvement using MWCNTs in the base asphalt binder.

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