Dynamic Behavior of Pavement Layers on Sand Subgrade
Engineering and Technology Journal,
2021, Volume 39, Issue 12, Pages 1760-1770
AbstractReinforcement interlayer reduces the development of cracks in the asphalt overlay by absorbing the stresses induced by heavy traffic or underlying cracking in the early-constructed pavement. This research is dedicated to studying the behavior of pavement layers on a sand subgrade under simulated effect of earthquake. In this study, the sand layer has a thickness of 600 mm and the base course is taken as 300 mm. The asphalt layer was prepared as a panel with dimensions of 300 × 300 × 50, which represents the surface layer. These layers are experimentally tested under the influence of earthquake loading with different frequencies 0.5, 1, 1.5 Hz. The tests consist of two parts without adding the geogrid, with geogrid in the center of the base layer and between the base layer and sand layer. Loaded stresses in the three layers are monitored using stress gauge sensors, while displacements of the asphalt layer by using displacement gauge sensor. Obtained results considered models reinforced with geogrid, the stress recorded is higher than in unreinforced models but the displacement decreases by increasing the geogrid in the layers at three frequencies. When the geogrid is laid between the base course and sand layer, the stress in the sand subgrade layer is less than that in the base and asphalt layers.
- The experimental work contains of pavement layers on a sand subgrade under the effect of earthquake.
- The pavement layers are tested under the influence of earthquake loading with different frequencies.
- The tests consist of two parts without adding the geogrid, and with geogrid.
- Stresses in the three layers are measured and displacements of the asphalt layer.
- For models reinforced with geogrid, the stress recorded is higher than in unreinforced models.
 S. M., Salih, S. M., Stress Transfer and Distribution in Reinforcement under Footings on Reinforced Earth, M.Sc. thesis, College of Engineering, Al-Mousl University, Iraq, 1989.
 I. L., Al-Qadi I.L. and A. K. Appea, Eight-Year of Filed Performance of a Secondary Road Incorporating Geosynthetics at the Subgrade-Base Interface., Transportation Research Board, 82rd Annual Meeting Washington D.C, 2003.
 W. H. Holder and J. Andreae, Geogrid Reinforcement to Reduce Pavement Section Thickness: A Case Study, ASCE, Conference Proceedings Paper, Geotechnical Engineering for Transportation Projects (GSP 126) Reston, Va., 1006-1024, 2004.
 T. B. Edil, W. Kim, C. H. Benson and B. F. Tanyu B.F., Contribution of Geosynthetic Reinforcement to Granular Layer Stiffness. ASCE, Conference Proceeding Paper, Soil and Material Inputs for Mechanistic Empirical Pavement Design (GSP 169), 1-11, 2007.
 H. Y., Jeon, Theoretical Approach of Long-term Behaviors of Geogrids, the 12th international Conference of International Association for Computer Methods and Advances in Geomechanics (IACMAG), 1-6 October, Goa, India, 2008.
 J. G. Zornberg, J. A. Prozzi, R. Gupta, R. Luo, J. S. McCartney, J. Z. Ferreira, and C. Nogueira, Validating Mechanisms in Geosynthetic Reinforced Pavements, Center for Transportation Research (CTR), Report No. 0-4829-1, Austin, Texas, February, 2008.
 D. S. V. Prasad, K. M. Anjan, R. G. V. R. Prasada, V. Kondayya, Behaviour of Flyash Reinforced Sub-bases on Expansive Soil Subgrades under Cyclic Loading, Indian Geotechnical Conference–2010, GEOtrendz December 16–18, IGS Mumbai Chapter & IIT Bombay, 727730, 2010.
 A. K., Choudhary, K. S. Gill and J. N. Jha, J.N., Improvement in CBR Values of Expansive Soil Sub-grades using Geo-synthetics, Indian Geotechnical Conference December 15-17, 2011, Kochi (Paper No. J-233), 2011.
 H. C. Dan, D. Yang, X. Liu, A. P. Peng, Z. Zhang, Experimental Investigation on Dynamic Response of Asphalt Pavement Using SmartRock Sensor under Vibrating Compaction Loading, Construction and Building Materials 247 (2020) 118592, https://doi.org/10.1016/j.conbuildmat.2020.118592, 2020.
 ASTM Book of Standards, American Society for Testing and Materials, 2017.
 SCRB/R9, General Specification for Roads and Bridges, Section R/9, Hot-Mix Asphalt Concrete Pavement, Revised Edition. State Corporation of Roads and Bridges, Ministry of Housing and Construction, Republic of Iraq, 2003.
 M. M. Hussein, M. Y. Fattah, M. M. Hilal, M. M., Transmission of Stresses in Pavement Layers Subjected to Earthquake Excitation, 4th International Conference on Engineering Sciences (ICES 2020), IOP Conf. Series: Materials Science and Engineering 1067 (2021) 012060, IOP Publishing doi:10.1088/1757-899X/1067/1/012060, 2021.
 W. N., Abdulkhabeer, M. Y. Fattah, M. M. Hilal, Characteristics of Asphalt Binder and Mixture Modified With Waste Polypropylene, Engineering and Technology Journal 39,08, 2021, 1224-1230. http://doi.org/10.30684/etj.v39i8.1716, 2021.
 A. I. K. Al-Utabi, An Approach In Improving Unpaved Roads Overlying Soft Clay Soils Using Geogrid, M.Sc, thesis, College of Engineering, Al-Mustansiryia University, Iraq, 2011.
 K., Reddy, 'Influence of Subgrade Condition on Rutting in Flexible Pavements- an Experimental Investigation', International Journal of Civil Engineering and Technology, 4, 3, 2013, 30-37.
 Z. T. Teama, Suitability of Dune Sands Subgrade Beneath Flexible Pavement Structure under Repeated Loads, M.Sc, thesis, College of Engineering, Al-Mustansiryia University, Iraq, 2014.
 Tensar International, Railways-Reinforcing Ballast under Railway Track, Technical Publications, 2001.
 M. K., Al-Rcaby, Dynamic Response to Lateral Excitation of Pile Group Model in Sandy Soil, Ph.D. thesis, Building and Construction Engineering Department, University of Technology, Baghdad, Iraq, 2016.
 M. Y. Fattah, A. S. Aladili, H. F. Yousif, Investigation of Reinforced Sub-base Layer on Saturated Expansive Subgrade Soil under Cyclic Loading, International Journal of Earth Sciences and Engineering, 10, 3,2017, 604-615, DOI:10.21276/ijee.2017.10.0319.
 M. Y. Fattah, M. R Mahmood, M. F. Aswad, Experimental and Numerical Behavior of Railway Track Over Geogrid Reinforced Ballast Underlain by Soft Clay, Proceedings of the 1st GeoM East International Congress and Exhibition, Egypt 2017 on Sustainable Civil Infrastructures, Recent Developments in Railway Track and Transportation Engineering, 14, 1-26, 2017.
 M. Y. Fattah, H. H. Alwash, S. A. Hadi, Behavior of Khassa Chai Earth Dam under Earthquake Excitation, Engineering and Technology Journal, University of Technology Iraq, 34 , (A), 15, 2016, 2784-2795.
 A. M. Raheem, M. Y. Fattah, M. K. Al-Recaby, Earthquake Response of Model Footings on Soft Clays Strengthened by Stone Columns, Engineering and Technology Journal 39 ,08,2021, 1216-1223. http://doi.org/10.30684/etj.v39i8.1651, 2021.
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