Fibre reinforced concrete can offer a convenient, practical and economical method for overcoming micro-cracks and similar type of deficiencies.

1. Use of Human Hair as Natural Fibre for Reinforced Concrete
PRESENTED BY- SHASHANK SHEKHAR

2.  Fibre reinforced concrete can offer a
convenient, practical and economical method
for overcoming micro-cracks and similar type of
deficiencies.
 Experiments were conducted on concrete beams
and cubes with various percentages of human
hair fibre i.e. 0%, 1%, 1.5%, 2%, 2.5% and 3% by
weight of cement.

3.  Human hair is strong in Tension,
hence it can be used as a Fibre
reinforcement material. Hair
Fibre (HF) an alternate non-
degradable matter is available in
abundance and at a very cheap
cost. It also creates
environmental problem for its
decompositions.
 Present studies has been
undertaken to concrete on the
basstudy the effect of human
hair on plain cement is of its
compressive, crushing, flexural
strength and cracking control to
economies concrete and to
reduce environmental problems.

4.  Concrete containing
cement, water, aggregate,
and discontinuous,
uniformly dispersed or
discrete fibres is called
fibre reinforced concrete.
 Fibre is a small piece of
reinforcing material
possessing certain
characteristics
properties.

5. To control cracking due to both Plastic
shrinkage and drying shrinkage.
They also reduce the permeability of
concrete and thus reduce bleeding of
water.
fibres also produce greater impact,
abrasion and shatter resistance in
concrete.

6. Increased durability arises.
FRC is used in civil structures where
corrosion is to be avoided at the
maximum.
Fibre reinforced concrete is better
suited to minimize
cavitations/erosion damage in
structures such as sluice-ways,
navigational locks and bridge piers.

7. The main disadvantage associated
with the fibre reinforced concrete is
fabrication. The process of
incorporating fibres into the cement
matrix is labour intensive and
costlier than the production of the
plain concrete. The real advantages
gained by the use of FRC overrides
this disadvantage.

8. FRC NRC
High durability Lower durability
Protect steel from corrosion Steel potential to corrosion
Lighter materials Heavier material
More expensive Economical
With the same volume, the
strength is greater
Less workability.
With the same volume, the strength is
less
High workability as compared to FRC.

9.  It has a high tensile strength which is equal
to that of a copper wire with similar
diameter.
 Hair, a non-degradable matter is creating an
environmental problem so its use as a fibre
reinforcing material can minimize the
problem.
 It is also available in abundance and at a
very low cost.
 It reinforces the mortar and prevents it from
spelling.

10. •Hairs are used as a fibre reinforcing material in concrete to
study its effects on the compressive, crushing, flexural strength
and cracking control to economise concrete and to reduce
environmental problems created by the decomposition of hair.
Hair fibres segregation.

11. HAIR
FIBRE
MIXING IN
CONCTRE
Hair fibre mix in admixture

12. The methodology adopted to test the
mechanical properties and strength of
hair reinforced concrete is governed by:
 Compressive Strength
 Flexural Strength
Various cubes and beams are tested and
analysed for finding the effect of using
hair as fibre reinforcement.

13. Compression test:-
For determining the effect of hair as fibre in
concrete following tests were performed:
 First of all the mould preferably of cast iron,
is used to prepare the specimen of size 150 ×
150 × 150 mm.
 During the placing of concrete in the moulds
it is compacted with the tamping bar with
not less than 35 strokes per layer.
 Then these moulds are placed on the
vibrating table and are compacted until the
specified condition is attained.

14. •After 24 hours the specimens are removed from the
moulds and immediately submerged in clean fresh
water.

15. •After 28 days the specimens are tested under
the load in a compression testing machine.
Compression testing machine

16. After Compression testing cube

17. The test is carried out in the following steps:
 First of all the mould preferably of cast iron, is used
to prepare the specimen of size 150 × 150 × 700 mm.
 During the placing of concrete in the mould it is
compacted with the tamping bar weighing 2 kg, 400
mm long with not less than 35 strokes per layer.
 Then this mould is placed on the vibrating table and
is compacted until the specified condition is
attained.
 After 24 hours the specimen is removed from the
mould and immediately submerged in clean fresh
water.

18. •After 28 days the specimen is taken out from the
curing tank and placed on the rollers of the
flexural testing machine as shown in figure.
Beam specimen

19. Flexural testing machine

21. Rigid pavement:-
 The rigid pavement characteristic of the pavement are
associated with rigidity or flexural strength or slab
action so the load is distributed over a wide area of sub
grade soil. Rigid pavement is laid in slabs with steel
reinforcement.
 The rigid pavement are made of cement concrete
either plan, reinforce of pre stressed concrete and
using hair fibre.
 Critical condition of stress in the rigid pavement is the
maximum flexural stress occurring in the slab due to
wheel load and the temperature change.
 In the rigid pavement using 1-3% hair fibre then
easily increase strength and life of rigid pavement.

22.  Rigid lasts much longer i.e.
30+ years compared to 5-10
years of flexible pavements.
 In the long run it is about half
the cost to install and
maintain. But the initial costs
are same what high.
 Rigid pavement has the
ability to bridge small
imperfections in the sub-
grade.
 Less maintenance cost and
continuous traffic and flow.
 High efficiency in terms of
functionality
Rigid pavement
model

23.  According to the test performed it is observed that
there is remarkable increment in properties of
concrete according to the percentages of hairs by
weight of in concrete. When M15 concrete with 3%
hair is compared with the plain cement concrete, it
is found that there is an increase of 20% in
compressive strength. When M20 concrete with 3%
hair is compared with the plain cement concrete, it
is found that there is an increase of 8.8% in
compressive strength and 5.5% in flexural strength.
When M-25 concrete with 3% hair is compared with
the plain cement concrete, it is found that there is
an increase of 11% in compressive strength.