Laboratory Tests on Hydraulic Lime Mortar Reinforced With Jute Fibres

Antonio Formisano1, *, Giovanni Chiumiento1, Enzo J. Dessì1
1 Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Piazzale Tecchio 80, 80125 Naples, Italy

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© 2020 Formisano et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Piazzale Tecchio 80, 80125Naples, Italy E-mail:



Considering the high seismic vulnerability of masonry buildings located in the Italian territory, the implementation of seismic retrofit programs is strongly needed.. With consideration for sustainable interventions, it is evident that the retrofit techniques to protect the historical heritage should be carried out with innovative green compound materials, such as mortars reinforced with natural fibres.


In the current paper, laboratory tests on lime mortars strengthened with raw jute fibres have been performed.


The workability of the fibre-reinforced mixture has been assessed through shaking table tests, and the mechanical resistances of standard specimens have been evaluated by bending and compression tests.


Considering the hygroscopic nature of jute, it has been identified that the optimal water/lime ratio and the maximum water percentage are absorbed by jute fibres. From the results, how the spreading of the mixture, which is indicative of the mortar consistency, changes with the water/lime ratio, has been evaluated. From bending tests, the effective behaviour of fibres, which provide a stitching effect of the failure crack in the investigated fibre-reinforced lime mortars, has been observed.


Finally, the results of compression tests have shown that the examined fibre-reinforced mortars can be effectively used as building products according to the actual Italian technical code NTC 2018.

Keywords: Masonry structures, Plaster, Lime mortar, Jute fibres, Flexural stress, Compression strength.