Effect of Polypropylene Fibers on the Mechanical Properties of Gypsiferous Soils

Document Type : Research Paper

Authors

1 Professor, Isfahan University of Technology

2 Former Graduate Student, Isfahan University of Technology

3 Assistant Professor, Isfahan University of Technology

Abstract

The presence of gypsiferous soils classified as problematic soils in the context of hydraulic structures may cause structural damage within either local or global measures.  Soil stabilizing and improving is considered as a method or technique of dealing with these types of soils. Methods of soil reinforcing could be conducted through the followings: utilization of steel strap, geotextile, geosynthetics, as well as fibers.  The effect of polypropylene fibers (6 and 12 mm in length) of different percentages (0.05, 0.1, 0.15, and .25) on shear parameters, density specifications, Atterberg limits, and soil bearing capacity is investigated in the present study. The obtained results were statistically analyzed in a completely randomized design, with their means compared at a statistical level of 1% (P<0.01). Results show that none of the polypropylene fibers significantly affects water content, maximum dry weight per unit volume and soil adhesion. This is while either length of the mentioned fibers significantly increase the angle of internal friction, bearing capacity, as well as the liquid and plastic limits of soil (Atterberg limits).

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References

Abtahi, S. M. (2009). Use of new chemicals for soil stabilization. Proceedings of the Eighth Congress of Civil Engineering, Shiraz University, May. (In Persian)
Al-Refaie, N. (1976). Problems created by irrigation schemes and ground gypsum-bearing area of the Euphrates River in Syria. National Committee on Irrigation and Drainage., Publication NO 16.
Arkelyan, E. A. (1986). Characteristics of the determination of the physical properties of gypsum soils. Soil Mech. & Found, 23, 27-29.
Benson, C. H. and Khire, M. V. (1994). Reinforcing Sandwith Strips of Reclaimed High-Density Polyethylene. Geotechnical and Geoenvironmental Engineering, 120, 828-855.
Dean, R. and Freitag, F. (1986). Soil Randomly Reinforced with Fibers. Geotechnical and Geoenvironmental Engineering, 112, 823-827.
Gray, D. H. and Ohashi, H. (1983). Mechanics of Fiber Reinforcement in Sand. Geotechnical and Geoenvironmental Engineering, 109, 335-353.
Hoare, D. (1982). Synthetic Fabrics Soil Filter. Geotechnical and Geoenvironmental Engineering, 108, 1230-1246.
Hongu, T. and Philips, G. (1990) New Fibers ellis hor wood series  in polymercience and technology. Fibers and Polymers, 3, 1-7.
Maher, M. H. and Gray, D. H. (1990). Static response of sands reinforced with randomly Distributed fiber. Geotechnical Engineering, 116, 1661-1677.
Mahmoudi, S. H. (1995). Properties and management of soils with gypsum. Proceedings of the Fourth Congress of Soil Science, Iran University of Technology. (In Persian)
Maksimovich, N. G. and Sergeev, V. L. (1983). Effect of chemical injection stabilization on gypsum stability in foundation of hydraulic structure. HydrotechnicalCon, 17, 380-384.
Nataraj, M. S. and McManis, K. L. (1997). Strength and deformation properties of soils reinforced with fibrillated fibers. Geosynthetics, 4, 65-79.
Nelson, R. E. Klameth, L. C. and Nettleton, W. D. (1987) Determination of soil gypsum content and expressing properties of gypsiferous soils. Soil Sci, Soc, 42, 147-168.
Rahimi, H. (2000) Constructing irrigation canals in unconventional soils. Paper Technical Workshop - Training irrigation canals limitations of solution, 128-163. (In Persian)
Ranjan, G. Vasan, R. M., and Charan, H. D. (1996). Probabilistic Analysis of Randomly Distributed Fiber Reinforced Soil. Geotechnical and Geoenvironmental  Engineering, 122, 419-426.
Sheng, T. C. (2010). Interfacial shear strength of fiber reinforced soil. Geotextiles and Geomembranes, 28, 54-260.
Standards Soil Mechanics Testing. (1984) Soil Mechanics Note No.8.
Wang, Y., Frost, J. D., and Murray, J. (2000). Utilization of Recycled Fiber for Soil Stabilization. Proceedings of the Fiber Society Meeting, Guimaraes, Portugal, 17-19 May, 59-62.
Yetimoglu, T., Inanir, M., and Inanir, O. E. (2005). study on bearing capacity of randomly Distributed fiber-reinforced sand fills overlying soft clay. Geotextiles and Geomembranes, 23, 174-183.
 
 

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