Investigation of Various Pavement Repairs in Low-Volume Roads over                    Expansive Soil

Dessouky, Samer; Oh, Jong‐Min; Ilias, Mohammad; Lee, Jun Young; Park, Daewook

doi:10.1061/(asce)cf.1943-5509.0000623

Cited by 12 publications

(3 citation statements)

References 2 publications

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“…Regarding the low values longitudinal strain and vertical stress of pavement (Figure 10) when the geogrid is used in subgrade, this can be justified because of the vertical moisture barriers with geogrid could reduce the moisture variation in subgrade and restrain pavement roughness. This result is confirm by others researchers [40] whereas, the geogrid in crushed stones base-improved cement subbase layer interface and the geogrid in crushed stones base layer did not confirm the research which state that the geogrid serves as an initial barrier to upward crack propagation and the flexible layer overlay on the top of the geogrid serves as stress relief layer [41].…”

Section: Numerical Modeling Of Pavement With and Without Reinforcement By Geogridsupporting

confidence: 55%

Enhancing Performance of Silty Clayey Sandy and of Pavement Using Cement and Geogrid in South Republic of Benin (West Africa)

Alaye¹,

Jeannot²,

Youssouf³

et al. 2020

IJMPEM

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Pavement infrastructure built on expansive soil can experience multiple forms of degradation, mainly cracks when there are no adequate arrangements made to avoid or to limit the impact of the changes on the volume of the supporting soil. In this research, three objectives have been adopted in-depth on the performance characteristics of West Africans soil and aim to (i) accessing characteristics of soil types in the region; (ii) assessing the performance of these soils with 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5% and 5.5% of cement and (iii) using geogrid to evaluate the performance of pavement on clayey soil. Design of flexible pavement is largely based on empirical methods using layered elastic and two-dimensional finite element (FE) analysis. Currently a shift underway towards more mechanistic design techniques to minimize the limitations in determining stress, strain and displacement in pavement analysis. For this reason, computational analysis of pavement methods have been investigated on the structural model pavement and the effectiveness of geogrids as a reinforcement of layer in a flexible pavement system. In this study, flexible pavement modeling is done using Abaqus software in which model dimensions, element types and meshing strategies are taken by successive trial and error to achieve desired accuracy and convergence of the research. Flexible pavements (with and without geogrids) were built and subjected to 127.49 kN load applications and the Finite Element Method (FEM) as computer analysis under static load. The results reveal that the proportion of percentage cement leading to the best performances varying from 3% to 5.5%. And, the pavement made with geogrid in subgrade is the best. As a conclusion, in an unstable area, this research suggests the use of silty clayey sandy treated with a minimum percentage of 3% cement in subbase layer and geogrid in subgrade because, the inclusion of geogrid in subgrade reduces the deformation.

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Section: Numerical Modeling Of Pavement With and Without Reinforcement By Geogridsupporting

confidence: 55%

Enhancing Performance of Silty Clayey Sandy and of Pavement Using Cement and Geogrid in South Republic of Benin (West Africa)

Alaye¹,

Jeannot²,

Youssouf³

et al. 2020

IJMPEM

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“…Cyclic ground movements caused by fluctuation in moisture content in arid and semi-arid climates could manifest in the form of longitudinal cracks on the pavement structure ( 11 ). Expansive soil is considered one of the most common causes of pavement distresses ( 12 , 13 ).…”

Section: Impact Of Moisture On Unbound Layersmentioning

confidence: 99%

Flexible Pavement Resiliency and Mitigation Strategies Following Adverse Environmental Events

Tseng¹,

Al-Qadi

Tutumluer

et al. 2023

Transportation Research Record: Journal of the Transportation R

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Water accelerates flexible pavement damage in various ways, including subgrade and granular pavement materials strength reduction, frost heave, swelling of expansive subgrade soils, and asphalt binder stripping of aggregate in asphalt concrete (AC) mixes. This paper presents case studies of AC pavement sections in the U.S. that withstood high moisture events with limited effect on pavement performance and no immediate need for major maintenance or rehabilitation actions. The case studies comprise pavement sections in Florida and Louisiana that were subjected to catastrophic flooding events, a pavement section in Delaware that is constantly exposed to tidal water level variations, and pavement sections in Montana and Minnesota that experience seasonal freeze-thaw. These cases illustrated that flexible pavements could withstand climatic changes when appropriately designed and constructed. Mechanically or chemically stabilized subgrade, proper drainage, and/or minimizing plastic fines in unbound layers are all techniques that could effectively control moisture damage.

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“…Again, during the dry season, because of a decrease in moisture content the soil undergoes shrinkage. This alternative wetting-drying cycle results in the development of longitudinal, transverse, and block cracks and subsequent failure of the edges on the pavement surface ( 42 ).…”

mentioning

confidence: 99%

Field Performance of Geocell Reinforced Recycled Asphalt Pavement Base Layer

Khan

Biswas

Banerjee

et al. 2020

Transportation Research Record

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Utilization of 100% recycled asphalt pavement (RAP) material in the base layer of road construction can provide a cost-effective and sustainable solution. However, excessive permanent deformation of RAP reduces its applicability for such projects. In this study, the effectiveness of geocell reinforced RAP base (GRRB) layers for the flexible pavement sections constructed over the expansive subgrade is investigated. Furthermore, the mechanism involved in the improvement of material stiffness because of the development of additional confining stress in the reinforced base layer is also presented in this paper. During the initial monitoring period, the average vertical compressive stresses over the pavement subgrade for the reinforced sections were observed to be significantly lower in comparison with the corresponding unreinforced sections. The preliminary results indicate that GRRB layers can significantly improve the performance of the pavement by controlling the subgrade deformation.

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Investigation of Various Pavement Repairs in Low-Volume Roads over Expansive Soil

Cited by 12 publications

References 2 publications

Enhancing Performance of Silty Clayey Sandy and of Pavement Using Cement and Geogrid in South Republic of Benin (West Africa)

Enhancing Performance of Silty Clayey Sandy and of Pavement Using Cement and Geogrid in South Republic of Benin (West Africa)

Flexible Pavement Resiliency and Mitigation Strategies Following Adverse Environmental Events

Field Performance of Geocell Reinforced Recycled Asphalt Pavement Base Layer

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