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rengthening of flax textile-reinforced cement-based composite materials by
the addition of pozzolans
Filip Majstorović 1
1. filipmajstorovic5@gmail.com
Cement-based matrices were reinforced with flax textile and the effect of partial substitution of cement
by metakaolin (MK) was investigated in terms of final material strength and fibre-matrix bond properties.
Results indicated that the strength of material generally increased with the increase in MK content. An
optimum replacement of Portland cement with 30% metakaolin amount was concluded from the study.
It was found that MK initiates pozzolanic reaction within the cement-based matrix, and thus reduces
calcium chloride content, which is harmful to natural fibres. MK also served as a filler material due to
its particle fineness, which reduced matrix porosity and improved the fibre-matrix interfacial bond and
resulted in an increase in flexural strength and energy absorption capability. The study included finite
element analysis (FEA) to predict mechanical behaviour and properties of cement-based matrices with
and without reinforcement using flax textiles, namely flexural strength. The FEA reflected boundary
conditions of the experiment and used damage mechanics principles employing the microplane material
model of cementitious matrix. The FEA was compared and verified by the obtained experimental results.
Keywords: textile-reinforced concrete, pozzolans, natural fibres, light-weight structures, cement-based
composites
Acknowledgements
This project has received funding from the European Union’s Horizon 2020 research and innovation
programme under the Marie Sklodowska-Curie Actions [grant number 898179], Cost Action CA17107,
the European Union’s Horizon 2020 research and innovation programme under H2020 WIDESPREAD-2-
Teaming [grant number 739574] and investment from the Republic of Slovenia and the European Regional
Development Fund.
INNORENEW COE INTERNATIONAL CONFERENCE 2021
34
the addition of pozzolans
Filip Majstorović 1
1. filipmajstorovic5@gmail.com
Cement-based matrices were reinforced with flax textile and the effect of partial substitution of cement
by metakaolin (MK) was investigated in terms of final material strength and fibre-matrix bond properties.
Results indicated that the strength of material generally increased with the increase in MK content. An
optimum replacement of Portland cement with 30% metakaolin amount was concluded from the study.
It was found that MK initiates pozzolanic reaction within the cement-based matrix, and thus reduces
calcium chloride content, which is harmful to natural fibres. MK also served as a filler material due to
its particle fineness, which reduced matrix porosity and improved the fibre-matrix interfacial bond and
resulted in an increase in flexural strength and energy absorption capability. The study included finite
element analysis (FEA) to predict mechanical behaviour and properties of cement-based matrices with
and without reinforcement using flax textiles, namely flexural strength. The FEA reflected boundary
conditions of the experiment and used damage mechanics principles employing the microplane material
model of cementitious matrix. The FEA was compared and verified by the obtained experimental results.
Keywords: textile-reinforced concrete, pozzolans, natural fibres, light-weight structures, cement-based
composites
Acknowledgements
This project has received funding from the European Union’s Horizon 2020 research and innovation
programme under the Marie Sklodowska-Curie Actions [grant number 898179], Cost Action CA17107,
the European Union’s Horizon 2020 research and innovation programme under H2020 WIDESPREAD-2-
Teaming [grant number 739574] and investment from the Republic of Slovenia and the European Regional
Development Fund.
INNORENEW COE INTERNATIONAL CONFERENCE 2021
34
