Influence of randomly oriented fibres on shear strength of mineral soils

Tymoteusz Zydroń, Andrzej Gruchot


The purpose of the paper was to determine two things: the influence of type and amount of reinforcement on shear strength of soil and the relation between the efficiency of reinforcement and soil moisture content. Shear strength was determined in a direct shear apparatus in a box with a square section of 80x80 mm. The range of normal stress was from 25 to 150 kPa and the shear velocity was 1.0 mm×min-1. The tests were carried out on medium sand and clayey coarse silt at two moisture contents and with two types of reinforcement - polyolefine fibres and 40x3 mm foil stripes. The addition of reinforcement was 0.5 and 1.0% in relation to the dry mass of soil. Test results indicated that using polyolefine fibres as dispersed reinforcement in a sandy soil increased its shear strength. Whereas the influence of using foil stripes on shear strength was little. However, using both types of reinforcement in a cohesive soil increased its shear strength and this influence was particularly clear at higher moisture content.


shear strength, fibre reinforcement, reinforced sand, reinforced clayey silt

Full Text:



Ahmad, F., Bateni, F., Azmi, M., 2010. Performance evaluation of silty sand reinforced with fibres. Geotextiles and Geomembranes, 28: 93–99.

Anagnostopoulus, C.A., Papaliangas, T.T., Konstantinidis, D., Patronis, C., 2013. Shear strength of sands reinforced with polypropylene fibers. Geotechnical and Geological Engineering, 31: 401–423.

Borys, M., 2007. Frictional resistance at the junction of geosynthetic anti-filtration screens in flood embankments (in Polish). Woda – Środowisko – Obszary Wiejskie, 7(2b): 21–31.

Consoli, N.C., Portella Montardo, J.P., Prietto, P.D.M., Pasa, G.S., 2002. Engineering Behavior of a Sand Reinforced with Plastic Waste. Journal of Geotechnical and Geoenvironmental Engineering, 128(6): 462–472.

Diambra, A., Ibraim, E., Muir Wood, D., Russell, A.R., 2010. Fibre reinforced sands: Experiments and modelling. Geotextiles and Geomembranes, 28: 238–250.

Erdogan, D., Altun, S., 2015. Undrainded response of loose fiber reinforced sand. C.B.U. Journal of Science, 11(1): 7–16.

Freilich, B.J., Li, C., Zornberg, J.G., 2010. Effective shear strength of fiber-reinforced clays. Proceedings of the 9th International Conference on Geosynthetics, 9ICG, Guarujá, Brazil, May, vol. 4, 1997–2000.

Glinicki, M., 2010. Beton ze zbrojeniem strukturalnym (in Polish). XXV Ogólnopolskie Warsztaty Pracy Projektanta Konstrukcji, 10–13.03.2010, Szczyrk, 1–30.

Gray, D.H., Ohashi, H., 1983. Mechanics of fiber reinforcement in sand”. Journal of Geotechnical and Geoenvironmental Engineering, 109(3): 335–353.

Gruchot, A., Pacławska, J., 2012. Influence of cement stabilization of the ash-slag mixture on its shear strength (in Polish). Przegląd Komunikacyjny, 9: 33–35.

Gruchot, A., 2013. Frictional resistance on the contact of ash-slag mixture and geotextile (in Polish). Acta Scientiarum Polonorum, Formatio Circumiectus, 12(4): 55–65.

Gruchot, A., Sieczka, P., 2013. Influence of fibre reinforcement on the geotechnical properties of fly ash (in Polish). Drogownictwo, 7(8): 241–246.

Lirer, S., Flora, A., Consoli, N.C., 2011. On the strength of fibre-reinforced soils. Soils and Foundations, 51(4): 601–609.

Lovisa, J., Shukla, S.K., Sivakugan, N., 2010. Shear strength of randomly distributed moist fiber-reinforced sand. Geosynthetics International, 17(2): 100–106.

Noorzad, R., Zarinkolaei, S.T.G., 2015. Comparison of mechanical properties of fiber-reinforced sand under triaxial compression and direct shear. Open Geoscience, 1: 547–558.

Pawłowski, A., Garlikowski, D., Orzeszyna, H., Lejcuś, K., 2008. Possibility of using fibre reinforcement to improve soils properties including application in antierosion protection (in Polish). Infrastruktura i Ekologia Terenów Wiejskich, 9: 137–147.

PN EN ISO 14688-2:2004. Geotechnical investigation and testing – Identification and classification of soil – Part 2: Principles for a classification (in Polish). Polski Komitet Normalizacji, Warszawa.

Pollen, N., Simon, A., 2005. Estimating the mechanical effects of riparian vegetation on stream bank stability using a fiber bundle model. Water Resources Research, 41, W07025, DOI: 10.1029/2004WR003801.

Satriawan, H., Fuady, Z., Mayani, N., 2016. Soil conservation by vegetative systems in oil palm cultivation. Polish Journal of Soil Science, XLIX(2): 223–235.

Schwarz, M., Cohen, D., Or, D., 2012. Spatial characterization of root reinforcement at stand scale: Theory and case study. Geomorphology, 171–172, 190–200.

Waldron, L., Dakessian, S., 1981. Soil reinforcement by roots: calculation of increased soil shear resistance from root properties. Soil Science, 132(6): 427–435.

Zych, T., 2010. Contemporary fibre reinforced concrete – possibility of forming of structural elements and architectural forms (in Polish). Czasopismo Techniczne, 18(8a): 371–386.

Data publikacji: 2019-11-21 12:59:40
Data złożenia artykułu: 2019-01-07 11:55:12


Total abstract view - 1014
Downloads (from 2020-06-17) - PDF - 634



  • There are currently no refbacks.

Copyright (c) 2019 Tymoteusz Zydroń

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.