Please read this article:

Article CONCRETE REINFORCED WITH NATURAL FIBRES.

Check out the following links:

http://onlinepubs.trb.org/Onlinepubs/trr/1989/1226/1226-008.pdf

https://www.linkedin.com/pulse/different-types-fibers-used-concrete-reinforcement-prince-max/

As I know, some of the natural fibers used in concrete are cellulose fiber, sisal and coconut. But, must be chemically treated before use in concrete to ensure that it will not be decomposed.

Please read this article:

Article CONCRETE REINFORCED WITH NATURAL FIBRES.

You may please go through the paper attached here.

these answers are helpful, thank you all

Most natural fibre used are jute fibre, coconut shell and sisal fibre. Attached is the work done with cocnut shell

coconut fibers,

It depends in the application you are aiming, if you look at the literature it is clear that natural fibers do not increase the strength of the composite (actually they reduce the strength) but ir will increase the thermal performance.

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Researchers have tried different types of natural fiber materials like sisal, jute, rice husk, flax, bamboo, banana fiber, oil palm fiber sugarcane bagasse, wood floor etc; it is observed that the test results of sisal, coconut coir, and bamboo are more promising. Other fibers are also ecologically advantageous; they have some limitations such as lower durability and lesser strength. However, the major disadvantage of using natural fibers is that the fibers will decay over time and the composite will lose its strength, resulting in sudden brittle failure. Hence, proper treatment of the fibers before mixing may be necessary. Some types of admixtures, such as resins and gums, can be tested to prevent decay of natural fibers that have been embedded in concrete.

Good question, I follow so.

thank you so much for these useful answers

I use comments. Thanks

With the best wishes

Mr Rezaei Ahvanooei.

Good answer dr.@dhiaa neama jabbar

We can also use Borassus aethiopum mart. Several research works carried out in Benin on the ligno-cellulosic material between the medulla and the bark of Borassus aethiopum mart allow to look forward to using it as reinforcement in the reinforced concrete. The tensile breaking strength at 12 % of humidity is 300 MPa; the Young’s modulus in four points flexion is 17200 MPa on average with a breaking load of 190 MPa. See attached files

Спасибо большое для всех.

Properly treated wooden fibres is good even to replace asbestos and polyperopylene fibres

Please refer my papers on natural fibres like bamboo and coconut coir reinforced concrete.

There ample of natural fibers are available which can be used as reinforcement in concrete. Some of the trending natural fibers are- bamboo, sugarcane fiber, coconut coir, human hair, sabai grass, jute etc. these material can be used for strength enhancement in concrete.

thank you all for these useful answers

Hi i think it will be useful for u

http://onlinepubs.trb.org/Onlinepubs/trr/1989/1226/1226-008.pdf

Researchers have used plant fibres as an alternative source of steel and artificial fibres to be used in composites (such as cement paste, mortar, concrete, polymer) for increasing its strength properties. These natural fibres, include coir, sisal, jute, hibiscus cannabinus, eucalyptus grandis pulp, malva, ramie bast, pineapple leaf, kenaf bast, sansevieria leaf, abaca leaf, vakka, date, bamboo, palm, banana, hemp, flax, cotton and sugarcane. All the best