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A platform for research: civil engineering, architecture and urbanism
Performance of composite geogrid reinforced unpaved pavements under cyclic loading
Highlights Granular base thickness can be reduced using the composite geogrid reinforcement. Composite geogrid is effective in reducing deformation and stresses on subgrades. Composite geogrid reinforcement would act as a rigid boundary in thicker bases.
Abstract This paper presents an experimental study on evaluating the performance of composite geogrid (CGG) reinforced and unreinforced unpaved pavement models using a steel box that has the length width and the height of 1.0 m and 1.0 m and 1.2 m respectively. A subgrade of CBR 2.5% (unsoaked) was prepared to a thickness of 500 mm, and then the granular base was compacted on top of the subgrade. Three base course thicknesses, namely 200 mm, 300 mm and 400 mm were adopted in this experimental study. Pavement models were subjected to repeated loading with the maximum pressure of 550 kPa. The test results suggest that the 200 mm thick reinforced granular base performs better compared to the 300 mm thick reinforced and unreinforced bases. Furthermore, the CGG reinforcement is effective in decreasing deformation in the subgrade and also in reducing vertical stresses on weak subgrade for thinner granular pavements. Nevertheless, the potential benefits of CGG reinforcement diminish with the increase in base thickness because the reinforcement would act as a rigid boundary, and the failure would occur above the reinforcement layer.
Performance of composite geogrid reinforced unpaved pavements under cyclic loading
Highlights Granular base thickness can be reduced using the composite geogrid reinforcement. Composite geogrid is effective in reducing deformation and stresses on subgrades. Composite geogrid reinforcement would act as a rigid boundary in thicker bases.
Abstract This paper presents an experimental study on evaluating the performance of composite geogrid (CGG) reinforced and unreinforced unpaved pavement models using a steel box that has the length width and the height of 1.0 m and 1.0 m and 1.2 m respectively. A subgrade of CBR 2.5% (unsoaked) was prepared to a thickness of 500 mm, and then the granular base was compacted on top of the subgrade. Three base course thicknesses, namely 200 mm, 300 mm and 400 mm were adopted in this experimental study. Pavement models were subjected to repeated loading with the maximum pressure of 550 kPa. The test results suggest that the 200 mm thick reinforced granular base performs better compared to the 300 mm thick reinforced and unreinforced bases. Furthermore, the CGG reinforcement is effective in decreasing deformation in the subgrade and also in reducing vertical stresses on weak subgrade for thinner granular pavements. Nevertheless, the potential benefits of CGG reinforcement diminish with the increase in base thickness because the reinforcement would act as a rigid boundary, and the failure would occur above the reinforcement layer.
Performance of composite geogrid reinforced unpaved pavements under cyclic loading
Jayalath, Chamara (author) / Gallage, Chaminda (author) / Wimalasena, Kasun (author) / Lee, Jeffrey (author) / Ramanujam, Jothi (author)
2021-08-12
Article (Journal)
Electronic Resource
English
Development of Design Guidelines for Composite-Geogrid Reinforced Unpaved Pavements
| Springer Verlag | 2022