Finite Element Simulation of Repeated Loading Test of Asphalt Concrete

Hatem, Noor; Hilal, Miami M.; Fattah, Mohammed Y.

doi:10.30684/etj.v40i5.2128

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…The test was simulated using the finite element approach while considering the boundary conditions, load stages, and temperature. A 55°C temperature was used to demonstrate that the temperature had no discernible impact [26].…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Repeated Traffic Loads on Most Significant Distresses of Flexible Pavement

Alwan

2023

E3S Web Conf.

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Early fatigue and rutting are among the most common types of road damage due to their main relationship with pavement performance. These damages occur due to excessive loads on the axles of the vehicles or improper design of the mixture in addition to the traditional design methods used in paving designs. Therefore, these premature damages must be avoided for the proper performance and service of the road. In order to overcome some traditional design weaknesses, mechanical-empirical design techniques using software like the ABAQUS program are essential. This program determines the exact stresses, strains, and displacement in asphalt pavement, which is then used to predict rutting and fatigue failures. HMA layers behave like viscoelastic materials in actual field conditions, and temperature variations and loading period influence their mechanical response. This study aims to investigate the ABAQUS software's problem-simulation capabilities and compare the findings to experimental work using the mechanical-empirical approach (E-M) to investigate the most valuable features during temperature change and optimize the design of paving constructions. The results highlighted the significance of the impact that increased loads and temperature changes might have on the performance service life of flexible paving with flexible-viscous layers, where life decreases with increasing loads applied to the pavement surface, where life reduces to 50% of age when the loads are increased to twice the standard load. At the same time, both the vertical stress and the percentage of damage increase with both the change in temperature and with the Temperature increases also result in higher tensile and compressive strain values, which might have an impact on the cost of the paving life cycle. Therefore its impact on future maintenance requirements must be verified.

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Section: Literature Reviewmentioning

confidence: 99%

Effect of Repeated Traffic Loads on Most Significant Distresses of Flexible Pavement

Alwan

2023

E3S Web Conf.

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“…Also, the responses of cyclic loading reveal that as deformation occurs, the damage rate increases. [2]. So, the performance of asphalt binders and mixtures has been improved by many studies over the past few decades, particularly in hot climates like the summer in Iraq.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Modified Asphalt Binder and Mixtures with Polyphosphoric Acid

Hilal

2023

NJES

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Rutting is the most common distress that most Iraqi asphalt pavements suffer from it. Asphalt binders are modified by using additives and polymers to enhance their physical qualities and fulfill the performance demands. Polyphosphoric acid (PPA) has been used in many countries to enhance the physical and mechanical characteristics of asphalt binders and mixtures that can improve the performance of asphalt pavements. In this paper, evaluation of the Iraqi asphalt binder and mixtures performance by using three percentages of Polyphosphoric acid (PPA) (0.4, 0.8, and 1.2) percent by asphalt binder weight and added to (60-70) penetration grade asphalt binder to show the applicability and suitability of using PPA in asphalt pavement in Iraq. Original asphalt binder and modified are subjected to traditional tests which are penetration, ductility, softening point, and viscosity. Results show better performance and enhancement of the physical properties of the modified binder. Other tests are Marshall Stability and wheel track tests. The results of the addition of PPA to the asphalt mixture show increases in the Marshall Stability and enhance the performance of the asphalt pavement mixtures. The wheel track test is applied to the original and modified mixture at two test temperatures 40 ?C and 50 ?C and the results show a decrease in the rut depth when the percentages of PPA increase. It is concluded that %PPA addition will enhance the performance of the Iraqi asphalt pavement and the mixture will be more rutting resistant, especially in high-temperature weather.

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“…The rutting distress can be defined as the distortion of the surface of the asphalt pavement due to the applied load [23]. Reduced temperature results in less oxidative binder hardening, which could result in more rutting and less stability in hot weather [24].…”

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confidence: 99%

Evaluation of Resilient Modulus and Rutting for Warm Asphalt Mixtures: A Local Study in Iraq

Hilal

Fattah

2022

Applied Sciences

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Warm-Mix-Asphalt (WMA) allows aggregates to be coated with asphalt binder at a temperature lower than the Hot-Mix-Asphalt (HMA) temperatures by using additives that make the asphalt mixtures more workable and the asphalt binder viscosity reduced. Due to the cost and environmental advantages of WMA, it is now more frequently employed in the mixtures of asphalt pavement. WMA with two percentages of zeolite (0.3% and 0.5%) is used in this research. The optimum asphalt content of WMA mixtures has a lower value compared to the HMA mixture. According to Marshall Stability’s findings, the HMA has a higher value of stability, whereas the WMA mixtures for both percentages of zeolite have a lower value of stability. WMA mixture with 0.5% zeolite has a higher Marshall Flow value, which is followed by zeolite at 0.3% and the lower value of flow was for HMA. The resilient modulus for both HMA and WMA was determined. The findings indicate that, for the two percentages of zeolite, the resilience modulus of the WMA mixtures was lower than that of the HMA. Additionally, the findings indicate that the WMA has a high potential resistance against rutting that competes with the HMA mixture.

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Finite Element Simulation of Repeated Loading Test of Asphalt Concrete

Cited by 4 publications

References 7 publications

Effect of Repeated Traffic Loads on Most Significant Distresses of Flexible Pavement

Effect of Repeated Traffic Loads on Most Significant Distresses of Flexible Pavement

Evaluation of Modified Asphalt Binder and Mixtures with Polyphosphoric Acid

Evaluation of Resilient Modulus and Rutting for Warm Asphalt Mixtures: A Local Study in Iraq

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