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Dynamic Behavior of Asphalt Stabilized and Grid Reinforced Subgrade Soil

saad sarsam, Ahmad AL Sandok

Abstract


The impact of repeated loading (punching shear) on Asphalt stabilized and grid reinforced subgrade soil have been investigated in this study. Specimens of 152mm diameter and 116 mm in height have been prepared, cured, and then tested using the pneumatic repeated load system PRLS. The deformation-load repetitions data were recorded for each case. Data were fed to the finite element software for the modeling process. An assessment was conducted to search for the best realistic simulation, therefore the finite element models were developed using ABAQUS 6.13 software package. For pure and asphalt stabilized soil, the axisymmetric model was implemented. On the other hand, the reinforcement layers were simulated with shell element, the analysis results were then compared with those of experimental tests. Perfectly plastic model has been adopted to simulate all of the reinforcement layers, i.e. geogrid, geosynthetic and geotextile. It was concluded that the finite element simulation has given a good agreement with that of experimental tests.  It was concluded that Geotextile is capable to hold the stresses at the top layer of the soil and restrict its impact on the specimen. The Geosynthetic exhibit lower ability of stress absorption while the Geogrid impact on stress absorption was minimal. The numerical analysis showed a good agreement with experimental work in case of asphalt stabilized soil. The reduction in total displacement due to stabilization was (88 and 89) % after (1000 and 1800) load repetitions respectively. Stabilization or reinforcing the subgrade soil have improved its load sustaining ability by controlling the total displacement of the specimens significantly.

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REFERENCES

Tang, X., Stoffels, S., and Palomino, A. M.. Mechanistic-Empirical Performance Prediction of Geogrid-Modified Soft Soil Subgrade. In Geo-Congress 2014: Geo-characterization and Modeling for Sustainability 3054-3061 p.

Ozer, H., Al-Qadi, I. L., Hasiba, K. I., Wang, H., & Salinas, A. Pavement Layer Interface Shear Strength Using a Hyperbolic Mohr-Coulomb Model and Finite Element Analysis. In Airfield and Highway Pavement 2013: Sustainable and Efficient Pavements 1445-1456 p.

Ullagaddi P., and Nagaraj, T. Investigation on geosynthetic reinforced two layered soil system. Proceedings, 7th international conference on case histories in geotechnical engineering, Missouri University of Science and Technology. 2013, April 29- May 4.

Sarsam, S., and Al-Saidi, A. Impact of Plastic Grid Reinforcement on Behavior of Composite Soil Embankment Model. Open Journal of Functional Material Research, OJFMR, 2015, 2(2), 5-8 p.

Chen Q., and Farsakh, M. A. Structural contribution of geogrid reinforcement in pavement. In Geo Congress 2012: State of the Art and Practice in Geotechnical engineering, 1468-1475 p.

Archer S., and Wayne, M. H. Relevancy of Material Properties in Predicting the Performance of Geogrid-Stabilized Roadways. In Geo Congress 2012: State of the Art and Practice in Geotechnical Engineering. 1320-1329 p.

Chen Q., Abu-Farsakh, M., Voyiadjis, G. Z., & Souci, G. Shakedown analysis of geogrid-reinforced granular base material. Journal of Materials in Civil Engineering, 2012, 25(3), 337-346 p.

Ghazizade, M. J., & Safari, E. Analysis of Desiccation Crack Depth in Three Compacted Clay Liners Exposed to Annual Cycle of Atmospheric Conditions with and without a Geotextile Cover. Journal of Geotechnical and Geo environmental Engineering, 143(3), 0601-6024 p.

Giang, N. H., Kuwano, J., Izawa, J., & Tachibana, S. Influence of unloading–reloading processes on the pullout resistance of geogrid. Geosynthetic International, 2010, 17(4), 242-249. Goswami printers, Delhi.

Nelson, L., Fountain, G. B., & Wayne, M. H. Performance Verification of a Geogrid Mechanically Stabilized Layer Flexible Pavement Design As Part of the La Media Road Widening Project. In Geo Congress 2012: State of the Art and Practice in Geotechnical Engineering, 1391-1399 p.

Rahman, M. A., Arulrajah, A., Piratheepan, J., Bo, M. W., & Imteaz, M. A. Resilient modulus and permanent deformation responses of geogrid-reinforced construction and demolition materials. Journal of Materials in Civil Engineering, 2013, 26(3), 512-519 p.

Tatto, J., & Palmeira, E. M. Influence of Bedding Conditions on the Behavior of Geotextile Filters. In Geo-Frontiers. Advances in Geotechnical Engineering, 2011, 2244-2253 p.

Sarsam S., Al-Saeidy, A., & Falih, M. Assessing Pullout Resistance of Earth Reinforced Embankment Model. Journal of Engineering Geology and Hydrogeology, 2014, (JEGH), 2(1), 9-14 p.

American Society for Testing and Materials, ASTM. Road and Paving Material, Vehicle-Pavement System, Annual Book of ASTM Standards, 2009, Vol.04.03.

AASHTO, Standard Specification for Transportation Materials and Methods of Sampling and Testing, American Association of State Highway and Transportation Officials, 14th Edition, 2013, Part II, Washington, D.C.

Al Sandok A. Verification of layered theory for stabilized and reinforced subgrade model. MSc. Thesis, 2018, Department of Civil Engineering, University of Baghdad, Iraq.




DOI: https://doi.org/10.3759/ttea.v5i2.828

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