Finite Element Simulation of Rutting in Calcium Carbide Residue-Stabilized Expansive Subgrade
The mechanical characteristics of the granular and subgrade layers contribute significantly as the structural support offered to unpaved or thin-surfaced pavement systems is crucial. The rut contributed by the expansive clay and calcium carbide residue (CCR)-stabilized clay (9% by dry weight of soil...
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Veröffentlicht in: | Arabian journal for science and engineering (2011) 2023-10, Vol.48 (10), p.12875-12889 |
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Sprache: | eng |
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Zusammenfassung: | The mechanical characteristics of the granular and subgrade layers contribute significantly as the structural support offered to unpaved or thin-surfaced pavement systems is crucial. The rut contributed by the expansive clay and calcium carbide residue (CCR)-stabilized clay (9% by dry weight of soil) is quantified by the laboratory wheel tracking test (WTT) facility. The optimization of CCR for the expansive clay stabilization was marked based on the improvement in workability, swell-shrink response, and strength characteristics. The swell potential of expansive clay was reduced from 7.8 to 0.25% with the addition of 9% CCR tested under a surcharge of 6.25 kPa, and the linear shrinkage strain of the clay was reduced by 63%. The rutting observed on expansive clay was reduced by 88% due to the increased cementation and rigidity in the 9% CCR-stabilized soil. The finite element analysis using Plaxis®3D and 2D was used for modelling the unsaturated subgrade layer. The rut depth predicted by simulation agrees well with the laboratory findings. The study's adopted model makes it easier to comprehend the rut depth under repeated wheel load rather than the laborious and expensive lab WTT. The single factorial sensitivity analysis showed that elastic modulus significantly controlled the rutting of clay and stabilized clay. |
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ISSN: | 2193-567X 1319-8025 2191-4281 |
DOI: | 10.1007/s13369-022-07595-7 |