Influence of random inclusion of treated sisal fibres on the unconfined compressive strength of highly compressible clay

Document Type : Article


1 School of Civil Engineering, 4 SASTRA University, Thanjavur – 613 401, Tamilnadu, India

2 School of Civil Engineering, SASTRA University, Thanjavur – 613 401, Tamilnadu, India

3 School of Civil Engineering, SASTRA University, 2 Thanjavur – 613 401, Tamilnadu, India


Reinforcement in the form of strips, grids and fibres enhances the engineering properties of soil. In this study, an attempt has been made to use treated sisal fibres to reinforce the soil so that unconfined compressive strength is enhanced. The compaction characteristics, stress-strain behavior, strength and failure pattern of the unreinforced and reinforced sisal fibre reinforced soil were investigated. The inclusion of sisal fibres increases the strength and modifies compressibility and permeability of the soil. The results of the study show that addition of sisal fibres to soil causes an increase in optimum moisture content and a decrease in dry density. The unconfined compressive strength and post peak strength of the reinforced soil increase with fibre content of 2 %. Failure pattern shows that fibre has a significant control over the development of cracks. Fibre inclusion suppresses the development of long cracks as they act as tension reinforcements. The use of sisal fibres gives the advantage of an eco-friendly material that aids sustainable development in addition to the beneficial modification of soil properties.


Main Subjects

1. Mandal, J.N. and Murti, M.V.R. \Potential for use
of natural bres in geotextile engineering", Proc. of
the International Workshop on Geotextiles, pp. 251-
254 (1989).
2. Aqeel Al Adili, Ra g Azzam, Giovanni Spagnoli, and
Joerg Schrader \Strength of soil reinforced with ber
materials (papyrus)", Soil Mech. Found Eng., 48(6),
pp. 241-247 (2012).
3. Chakraborty, T.K. and Dasgupta, S.P. \Randomly
y ash as foundation material", Proc. of the
Indian Geotechnical Conf., Madras, India, pp. 231-235
4. Prabakar, J. and Sridhar, R.S. \E ect of random
inclusion of sisal ber on strength behaviour of soil",
Constr Build Mater., 16, pp. 23-131 (2002).
5. Gray, D.H. and Ohashi, H. \Mechanics of ber reinforcement
in sand", J. Geotech. Eng. ASCE, 109(3),
pp. 335-353 (1983).
6. Lekha, K.R. \Field instrumentation and monitoring
of soil erosion in coir geotextiles stabilized slopes a
case study", Geotext. Geomembr., 22(5), pp. 399-413
7. Vishnudas, S., Savenije, H.H.G., Zaag, P.V.D., Anil,
K.R., and Balan, K. \The protective and attractive
covering of a vegetated embankment using coir geotextiles",
Hydrol. Earth Syst. Sci., 10, pp. 565-574 (2006).
8. Patel, S.K. and Singh, B. \Uncon ned compressive
strength behaviour of bre-reinforced lateritic soil", J.
Civil Eng. Environ. Tech., 1(4), pp. 93-98 (2014).
9. Kumar, A., Walia, B.S., and Mohan, J. \Compressive
strength of bre reinforced highly compressible clay",
Constr Build Mater., 20, pp. 1063-1068 (2006).
10. Mirzababaei, M., Miraftab, M., Mohamed, M., and
MacMohan, P. \Uncon ned compression strength of
reinforced clays with carpet waste bres", J. Geotech.
Geoenviron., 139(2), pp. 483-493 (2013).
11. Maher, M.H. and Gray, D.H. \Static response of
sands reinforced with randomly distributed bers", J.
Geotech. Eng. ASCE, 116(11), pp. 1661-1667 (1990).
12. Casagrande, M.D.T., Coop, M.R., and Nilo Cesar Consoli,
N.C. \Behaviour of a bre reinforced bentonite
at large shear displacement", J. Geotech. Geoenviron.,
132(11), pp. 1505-1508 (2006).
13. Al-Wahab, R.M. and El-Kedrah, M.M. \Using bres
to reduce tension cracks and shrink/swell in compacted
clays", In: Geoenvironment 2000, Geotechnical Special
Publication No. 46, Y. B. Acar and D. E. Daniel, Eds.,
ASCE, Reston, 1, pp. 791-805 (1995).
14. Malekzedah, M. and Bilsel, B. \E ect of polypropylene
ber on mechanical behaviour of expansive soils",
EJGE, 17(A), pp. 55-63 (2012).
15. IS: 2720, Compendium of Soil Testing, Bureau of
Indian Standards, New Delhi (2006).
16. Joseph, K., Filho, R.D.T., James, B., Thomas, S., and
De Carvalho, L.H. \A review on sisal bre reinforced
polymer composites", Rev. Bras. Eng. Agrc. Ambient,
3(3), pp. 367-379 (1999).
17. Jiesheng, L., Juan, Z., and Lin, X. \Deformation and
strength characteristics of sisal brous soil", EJGE,
19, pp. 1585-1594 (2014).
18. Anggraini, V., Asadi, A., Farzadnia, N., Jahangirian,
H., and Bujang B.K. Huat. \Reinforcement bene ts of
nanomodi ed coir ber in lime-treated marine clay",
J. Mater. Civ. Eng., 28(6), p. 06016005 (2016).
19. Michalowski, R.L. and Zhao, A. \Failure of berreinforced
granular soils", J. Geotech. Eng. ASCE,
122(3), pp. 226-234 (1996).
20. Zornberg, J.G. \Discrete framework for limit equilibrium
analysis of bre-reinforced soil", Geotechnique,
52(8), pp. 593-604 (2002).
21. Wu, Y., Li, Y., and Niu, B. \Assessment of the
mechanical properties of sisal ber-reinforced silty clay
using triaxial shear tests", Scienti c World J., 2014,
Article ID 436231, 9 pages (2014).
22. Tang, C., Shi, B., Gao, W., Chen, F., and Cai, Y.
\Strength and mechanical behavior of short polypropylene
ber reinforced and cement stabilized clayey soil",
Geotext. Geomembr., 25, pp. 194-202 (2007).
23. Gao, L., Hu, G., Xu, N., Fu, J., Xiang, C., and Yang,
C. \Experimental study on uncon ned compressive
strength of basalt ber reinforced clay soil," Adv.
Mater. Sci. Eng., 2015, Article ID 561293, 8 pages