Performance Evaluation of Asphalt Mixtures Modified with Nanomaterials. (Dept. C)

Abdel-Wahed, Talaat; Abdel-Raheem, Ashraf; Moussa, Ghada S.

doi:10.21608/bfemu.2022.221670

Cited by 5 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stopped delays as well as acceleration and deceleration delays were measured at that intersection using the test car method with GPS which is based on second-by-second vehicle speed profiles obtained from the GPS device to identify these components. Additional details of the data collection method and measurements were presented in the study of Hashim et al [21].…”

Section: Case Studymentioning

confidence: 99%

Calibration and Validation of Microsimulation Models for Estimating Control Delay at Signalized Intersections in Upper Egypt, Sohag city as case study

Mandor¹,

Hashim

El-Dessoky³

et al. 2022

Sohag Engineering Journal

Self Cite

View full text Add to dashboard Cite

Macroscopic traffic analysis software (SIDRA) and microscopic simulation package (VISSIM) are used in this paper to get the theoretical delay time. The paper presents a calibration process for the models developed in Sohag government using VISSIM software, since microscopic simulation models are becoming increasingly important tools in modeling transport systems. Traffic simulation models sometimes provide significant advantages over traditional planning or analytical models, such as SIDRA. Other common reasons for the popularity of simulation models include their attractive animations; their stochastic variability for the capture of real-world traffic conditions; and their capabilities to model complex roadway geometries, such as combined systems of urban streets and freeways. After calibration, validation work using field data from a signalized intersection in Sohag Governorate, Egypt, was conducted and proved the model validity to represent real systems. The simulation model was applied to evaluate the impact of lane width and traffic volume parameters on vehicular delays. The impact of each parameter was assessed and analyzed. It was found that there is a direct proportion between the control delay and the traffic volume parameter and inversely with the lane width parameter. Additionally, the problem of traffic jam at any intersection begins to occur when the traffic volume at 900 veh /h and above at different lane widths, especially at 9 ft resulting in higher delays.

show abstract

Section: Case Studymentioning

confidence: 99%

Calibration and Validation of Microsimulation Models for Estimating Control Delay at Signalized Intersections in Upper Egypt, Sohag city as case study

Mandor¹,

Hashim

El-Dessoky³

et al. 2022

Sohag Engineering Journal

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is a byproduct of crude oil refining and is a thick and dark-colored hydrocarbon substance with high viscosity. The main application of bitumen is in the construction of roads, where it is mixed with aggregate particles to form bituminous mixtures [1,2]. Bitumen contains two important components: asphaltenes and maltenes.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Waste Bottle Crates in the Form of Pyro-Oil and Fine Granules as Bitumen Rejuvenators and Modifiers

AL-Taheri,

Awed,

Gabr

et al. 2023

Sustainability

View full text Add to dashboard Cite

This research study aims to investigate the feasibility of incorporating high-density polyethylene waste (HDPEW) into bitumen applications. Two conventional conditions of bitumen, namely, aged bitumen (AB) and virgin bitumen (VB), are rejuvenated and modified, respectively, using post-consumer HDPEW sourced out of bottle crates. The outcome (Pyro oil, PO-HDPEW) of the pyrolysis thermochemical process is used by 10, 20, and 30% to rejuvenate AB, while the fine-ground granules (FG) (FG-HDPEW) are used by 2, 3, 4, and 5% to modify the VB with different percentages. Physical and rheological characterization testing, including penetration, softening point temperature, and rotational viscosity (RV), is conducted to evaluate the performance of the HDPEW-rejuvenated and -modified binders and optimize both rejuvenator and modifier percentages. In addition, physical and chemical tests, including scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR) are conducted to analyze the composition, distribution of surface contaminants, and the molecular structure of the bitumen, based on their respective wavelengths. Moreover, advanced mechanical and rheological tests, including dynamic shear rheometer (DSR), multiple stress creep and recovery (MSCR), and linear amplitude sweep (LAS) tests, are conducted to investigate the susceptibility of the rejuvenated and modified bitumen with HDPEW to rutting and fatigue cracking. The testing results demonstrate that the addition of PO-HDPEW to AB and FG-HDPEW modification of VB can enhance the physical, chemical, mechanical, and rheological properties of bitumen; however, this study recommends further research on the aging performance of the PO-HDPEW-rejuvenated bitumen. This research provides insights into using HDPEW as a cost-effective and eco-friendly rejuvenator and modifier on bitumen properties, which can aid in the longevity and performance of pavements.

show abstract

“…Speeds on Rural roads depend mainly on the condition of the pavement and its periodic maintenance operations, which improve its performance [1][2][3]. Many studies are being conducted to improve the condition of the paving, whether by adding polymeric materials, a mixture of nano materials, or even waste materials [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Also, lighting is one of the important factors affecting speed, as the presence of sunlight enhances the vision of the driver during daytime.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Daytime and Nighttime Operating Speed on Rural Multi- Lane Highway Sections in Egypt

Abdel-Wahed

Esawey

2022

Sohag Engineering Journal

View full text Add to dashboard Cite

Traditionally, the 85 th percentile of observed speeds is used to represent the operating speed associated with a specific site with certain geometric features. The presence of sunlight enhances the vision of drivers during daytime while visibility usually degrades during nighttime, especially on rural roads where no street lighting exists, and drivers would depend solely on their vehicle headlights. Visibility degradation is a safety concern which is magnified on horizontal curves. The objective of this study, therefore, is to compare operating speed in daytime and nighttime conditions on both tangent sections and horizontal curves. The analysis made use of spot speed data collected on horizontal curves of two major rural multilane highway in Egypt. Spot speed data were collected using speed guns during daytime and nighttime. The spot speed data were used to calculate the mean speed, variance of speed, and the 85th percentile speed. Analysis of Variance (ANOVA) was used to compare the speeds in daytime and nighttime. For most cases, it was shown that no significant difference existed in speed for daytime and nighttime. This was mainly attributed to the generous design features of the highway elements (e.g., large radii of horizontal curves, wide lanes, etc.). An attempt was made to develop operating speed models to see which variables impact speed during daytime. The results of operating speed models' development were deemed inappropriate due to the lack of variability in speeds.

show abstract

Performance Evaluation of Asphalt Mixtures Modified with Nanomaterials. (Dept. C)

Cited by 5 publications

References 33 publications

Calibration and Validation of Microsimulation Models for Estimating Control Delay at Signalized Intersections in Upper Egypt, Sohag city as case study

Calibration and Validation of Microsimulation Models for Estimating Control Delay at Signalized Intersections in Upper Egypt, Sohag city as case study

Evaluation of Waste Bottle Crates in the Form of Pyro-Oil and Fine Granules as Bitumen Rejuvenators and Modifiers

A Comparison of Daytime and Nighttime Operating Speed on Rural Multi- Lane Highway Sections in Egypt

Contact Info

Product

Resources

About