Effect of geogrid reinforcement on flexible pavements

Ibrahim, Eslam; El-Badawy, Sherif M.; Ibrahim, Mourad H. Z.; Gabr, Alaa R.; Azam, Abdelhalim

doi:10.1007/s41062-017-0102-7

Cited by 18 publications

(4 citation statements)

References 11 publications

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“…Three kinds of geogrid materials were used. It was noted that the placement of a geogrid beneath the asphalt layer reduced longitudinal tensile strain, which is in agreement with the findings from Ibrahim et al [23]. Moreover, it was also observed that, with higher axle loads, a geogrid placed at the subgrade was more effective in minimizing compressive strain on the subgrade.…”

Section: Introductionsupporting

confidence: 88%

Numerical Study of Geotextile-Reinforced Flexible Pavement Overlying Low-Strength Subgrade

et al. 2022

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Construction of low-volume flexible pavements on low-strength subgrade poses design, construction, and maintenance challenges. While researchers have generally acknowledged the potential for geosynthetics as reinforcement material, they mainly focused on permanent deformation. Therefore, this paper presents a numerical study of low-volume flexible pavement reinforced with geotextile material under static loading to determine the improvement due to reinforcement based on three criteria: rutting performance, geosynthetic placement location, and base course thickness reduction. Based on the Finite Element Method (FEM), three-dimensional modeling using Abaqus/CAE software was performed. From the study, a significant decrease in rutting of up to 25.2% for the unreinforced pavement system was attained with geotextile reinforcement at base–subgrade and AC–base interfaces. The deflection response behavior of the pavement system is affected by the elastic modulus of the geosynthetic material, placement location, and the number of reinforcement layers. As a result of reinforcement, a base course thickness reduction of up to 30% was achieved without sacrificing the pavement’s structural integrity.

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Section: Introductionsupporting

confidence: 88%

Numerical Study of Geotextile-Reinforced Flexible Pavement Overlying Low-Strength Subgrade

et al. 2022

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“…The crack is strongly influenced by the opening caused, earlier than by the reinforcement by geogrid which reduces its propagation, only by 5.5 mm for the temperature of 50 °C and 4.6 mm for the temperature of 20 °C. Concerning the influence of the type of geogrid used in the reinforcement of the specimens, there is a clear difference between the curves representing the reinforced specimens and the curve of the control specimen "R", which indicates that all geogrids delay the rise of cracks and prolong the life of the reinforced pavement (increase in the number of cycles), but to different degrees [33,34].…”

Section: Resultsmentioning

confidence: 99%

Tests on the Influence of Cyclic Loading and Temperature on the Behaviour of Flexible Pavement Reinforced by Geogrids with Numerical Simulation

2023

Teh. vjesn.

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Crack growth is one of the most common failure modes in flexible linear infrastructure as a result of the effect of cyclic traffic loads and the climate influence. The results of an experimental study performed by applying different types of geogrids on asphalt concrete (AC) samples are presented in this paper. Static then cyclic loading are applied to these specimens reinforced before loading and the rest pre-cracked and loaded. Also, the influence of the type of geogrid, the type of loading, the frequency of cyclic loading and the variation of the ambient temperature were examined, by simulating the performance of real pavements in the great Algerian south, where the thermal gradient may reach the value of 30 °C. A total of 20 specimens were tested to evaluate the tensile strength, stresses and strains. A numerical analysis based on the finite element method, using an adapted software, was performed to match the experimental results found. The results (experimental and numerical) indicate that the optimal type and location of the geogrid, by static or cyclic loading, is critical to achieve stress and strain gains of up to 26% and thus can result in an aging delay of approximately five years compared to the application of traditional methods.

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“…Maximum reduction was at about 14.2% when the geogrid reinforcement was located on the subgrade. This could be attributed to the fact that geogrids are tensile-resistant materials and are not used mainly to reduce vertical displacement in most cases [34,46,47]. However, from Table 2, it is noticed that the maximum reduction in fatigue, rutting strains, and vertical displacement values are obtained when the geogrid is placed on the subgrade, concluding that this is the best location for the geogrid.…”

Section: Resultsmentioning

confidence: 99%

Performance of Enhanced Problematic Soils in Roads Pavement Structure: Numerical Simulation and Laboratory Study

Abdullah

2023

Sustainability

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The deficiency of high-quality soils in Saudi Arabia’s southern and northern regions, as well as along the Arabian Gulf coasts, is regarded as one of the most common issues with the construction of roads. High compressibility, low shear strength, substantial volume change (particularly in Sabkha), and low bearing capacity are the most typical issues with these problematic soils. In this study, finite element simulations were performed using the Plaxis 3D software v20 to simulate the performance and study the critical responses (fatigue, rutting strains, and damage ratio) of an enhanced pavement structure with a geogrid reinforcement resting on the naturally problematic Sabkha subgrade. A normal asphalt concrete layer, a base layer of Sabkha soil stabilized with Foamed Sulfur Asphalt (FSA), and a sand dune subbase layer comprised the pavement structure. For each layer, the model’s input parameters were a mix of laboratory and literature data. The simulation was performed on a pavement structure without reinforcement and on another section enhanced with a geogrid positioned at various locations to determine the ideal placement for lowering the important responses such as fatigue, rutting stresses, and damage ratio. The nonlinear behavior of an FSA–Sabkha base, sand subbase layer, and Sabkha subgrade was simulated using the hardening soil model, whereas the asphaltic concrete layer and geogrid material were simulated using the linear elastic model. The findings of the simulations demonstrated that placing geogrid reinforcement at the top of the subgrade layer resulted in the greatest reduction in horizontal tensile (fatigue) and vertical compressive (rutting) strains, as well as vertical displacement (32.71%, 13.2%, and 14.2%, respectively). In addition, geogrid reinforcement greatly reduced the fatigue damage ratio (33% to 55%), although the reduction in the rutting damage ratio was slightly lower (14% to 30%). The simulation results were validated using a wheel tracking machine and it was clear that there is a reasonable agreement between the results.

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Effect of geogrid reinforcement on flexible pavements

Cited by 18 publications

References 11 publications

Numerical Study of Geotextile-Reinforced Flexible Pavement Overlying Low-Strength Subgrade

Numerical Study of Geotextile-Reinforced Flexible Pavement Overlying Low-Strength Subgrade

Tests on the Influence of Cyclic Loading and Temperature on the Behaviour of Flexible Pavement Reinforced by Geogrids with Numerical Simulation

Performance of Enhanced Problematic Soils in Roads Pavement Structure: Numerical Simulation and Laboratory Study

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