Swell and Consolidation Characteristics of Fiber Reinforced Cohesive Soil

Authors

  • Rajeena PG Student,Department of Civil Engineering, Government College of Technology, Coimbatore, Tamil Nadu, India
  • S. P. Jeyapriya Assistant Professor, Department of Civil Engineering, Government College of Technology, Coimbatore, Tamil Nadu, India

DOI:

https://doi.org/10.51983/ajeat-2018.7.1.886

Keywords:

Aspect ratio, Ground improvement technique, Polypropylene fiber,, Expansive soil, Swell and consolidation, Volume change

Abstract

Naturally occurring expansive clays show detrimental changes in volume when subjected to variation in water content. It leads to significant damages in foundations that are seated on these materials used for the construction in pavement, bridges especially in light weight buildings. The improvement could be in terms of reducing the swelling and differential settlement or increasing the shear strength of clayey soil. Reinforcing soil using fiber is one of the ground improvement techniques in which fibers are mixed randomly with the soil, in similar fashion to mixing with lime, cement or other additives. It eliminates the potential weak planes and maintains the strength isotropy by random reinforcement. The main objective of this study is to investigate the effect of synthetic polypropylene fibers on the swelling and consolidation characteristics of clay soil. The parameters considered for the study include the swelling pressure, swell potential and consolidation characteristics. Polypropylene fiber with aspect ratio (l/d) 12 is varied at 0%, 0.1%, 0.25%, 0.50% and 0.75% by dry weight of the soil is used as reinforcement. The swell potential(S%) and the swelling pressure(P) decreased with the addition of fiber. From the experimental results, 0.5% of polypropylene fiber is considered to be optimum. The results also revealed that the rate of heave formation is very less compared to that of unreinforced soil. From the consolidation test, it was observed that compression index, co efficient of compressibility and co efficient of volume change are 0.22, 0.8 mm2/N and 0.48mm2/N at the optimum fiber percentage.

References

N. M. Al-Akhras, M. F. Attom, and A. I. H. Malkawi, "Influence of Fibers on Swelling Properties of Clayey Soil," International Journal of Geosynthetics, ISSN: 1072-6349, vol. 15, pp. 304-309, 2015.

M. F. Attom, N. M. Al-Akhras, and A. I. H. Malkawi, "Effect of Fibers on the Mechanical Property of Clayey Soil," Journal of Geotechnical Engineering, vol. 162, pp. 277-282, 2009.

J. Li, C. Tang, D. Wang, X. Pei, and B. Shi, "Effect of Discrete Fiber Reinforcement on Soil Tensile Strength," Journal of Rock Mechanics and Geotechnical Engineering, vol. 6, pp. 133-137, 2014.

IS: 2720 (Part 15) -1986, "Determination of Consolidation Properties."

M. H. Maher and D. H. Gray, "Static Response of Sands Reinforced with Randomly Distributed Fibers," Journal of Geotechnical Engineering, ASCE, vol. 116, no. 11, pp. 1661-1677, 1990.

M. R. Abdi, A. Parsapajouh, and M. A. Arjomand, "Effects of Random Fiber Inclusion on Consolidation, Hydraulic Conductivity, Swelling, Shrinkage Limit And Desiccation Cracking Of Clays," International Journal of Civil Engineering, vol. 6, no. 4, 2008.

K. Mukherjeel, A. K. Mishra, and B. A. Mudaliyar, "A review on Consolidation and Strength Behaviour of Fiber Reinforced Expansive Soil," in 50th Indian Geotechnical Conference, 2015.

B. Phanikumar, B. R. Amshu Malini, and R. Karthika, "Swell–Consolidation Characteristics of Artificial Sand Clay Mixes," in Indian Geotechnical Conference, IGS, Mumbai chapter & IIT Bombay, 2010.

B. R. Phanikumar and R. Singla, "Swell-Consolidation Characteristics of Fibre-Reinforced Expansive Soil," The Japanese Geotechnical Society, pp. 0038-0806, 2016.

R. K. Kar, P. K. Pradan, and A. Naik, "Consolidation Characteristics of Fiber Reinforced Cohesive Soil," International Journal of Scientific and Technology Research, vol. 4, no. 06, ISSN 2277-8616, 2015.

R. K. Kar and P. K. Pradan, "Strength and Comprssibilty Characteristics of Randomly Distributed Fiber Reinforced Soil," International Journal of Geotechnical Engineering (IJGE), vol. 5, no. 2, pp. 235-243, April 2011.

T.-W. Hsu and S.-C. Lu, "Behavior of One-dimensional Consolidation," Journal of Engineering Mechanics, ASCE, vol. 457, 2006.

B. V. S. Viswanadham, B. R. Phanikumar, R. Rahul, and V. Mukherjee, "Swelling behaviour of a Geofiber-Reinforced Expansive Soil," Geotextiles and Geomembranes, vol. 27, pp. 73-76, 2009.

Y. Cai, B. Shi, W. W. Charles, and C.-s. Tang, "Effect of Polypropylene Fibre and Lime Admixture on Engineering Properties of Clayey Soil," Engineering Geology, vol. 87, pp. 230-240, 2006.

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Published

06-03-2018

How to Cite

Rajeena, & S. P. Jeyapriya. (2018). Swell and Consolidation Characteristics of Fiber Reinforced Cohesive Soil. Asian Journal of Engineering and Applied Technology, 7(S1), 33–36. https://doi.org/10.51983/ajeat-2018.7.1.886