Story of Poly Micro Fiber So Far Interesting Areas World is Working Futuristic Applications with Fibers in Concrete

1. FUTURE OF CONCRETE WITH FUTURISTIC
FIBERS
Rajiv Gauri, Assistant Vice President
Reliance Industries Limited
India
www.ril.com

2. Presentation Outline
www.ril.com
• Story of Poly Micro Fiber So Far
• Interesting Areas World is Working
• Futuristic Applications with Fibers in
Concrete

3. www.ril.com
STORY
OF
MICRO POLY FIBERS SO FAR

4. www.ril.com
Fibre Type Equivalent
diameter,
mm
Specific
Gravity
Tensile
Stength,
ksi
Elastic
Modulus,
ksi
Ultimate
elongation,
percent
Melt/oxidation
/decomposition
temperature,
degrees F
Water
absorption,
percent by
weight
Nylon 0.02286 1.14 140 750 20 392-430 2.8-5.0
Polyester 0.019812 1.34-1.39 33-160 2500 12-150 495 0.5 %
Polyethylene 0.0254-
1.016
0.92-0.96 85 725 3-80 273 Nil
Polypropylene - 0.90-0.91 20-100 500-700 15 330 nil
Polymer Matrix Options

5. www.ril.com
• Mono Filament 15‐40 micron diameter
Made through spinning route
• Fibrillated Tape thickness 30‐70 microns
Collation 8‐20 slits
Made through extrusion tape/films
• Multifilament 15‐40 microns diameter
Made through yarn route tensioning
Type of Micro Poly Fibers

6. www.ril.com
Mono Filament Fibrillated Multifilament
Tensile Good Excellent Excellent
Shape Flexibility Any Shape Possible Only one shape Inflexible
Dispersion Extremely Good Good Fair
Surface Energy High High Moderate
Typical Strong Point Plastic Shrinkage Flexural Plastic Shrinkage
Typical Dosage 0.6‐0.9kg/cum 0.9‐3 kg/cum 0.6‐0.9 kg/cum
Typical Applications in
Concrete
All Concretes
PCC/RCC/Plasters/Screeds/M
ortars/Precast Floorings/Roads/Precast
All Concretes
PCC/RCC/Plasters/Screed
s/Mortars/Precast
Comparative of Differently Manufactured Fibers

7. www.ril.com
Fibers should remain straight and should not ball. (Aspect ratio and coating keep
fiber straight)
Fiber should form bond and doesnot slip.(Shape and surface coating plays
important role)
Fiber should disperse.
Fiber should have good tensile strength(>450 Mpa)
Intrinsic Fiber Parameters for Performance

8. www.ril.com
Enabling Codes Present Status
BS EN 14889‐1:2006 – Fibres for Concrete. Steel Fibres. Definitions, specifications & conformity
BS EN 14845‐1:2007 – Test methods for fibres in concrete
ASTM A820‐06 – Standard Specification for Fiber‐Reinforced Concrete (superseded)
ASTM C1018‐97 – Standard Test Method for Flexural Toughness and First‐Crack Strength of Fiber‐Reinforced Concrete
(Using Beam With Third‐Point Loading) (Withdrawn 2006)
ASTM C1116/1116M Standard Specification for Fiber‐Reinforced Concrete
There are accredition to various codes of countries derived on all of above or part.

9. www.ril.com
• Generally from Volume fraction of 0.1‐1 %
• Studies done up to 5 % of volume fraction.
• Most properties improved are Crack Control‐Permeability‐
Impact‐Shatter‐ Abrasion.
• 90 % applications are relating to shrinkage control.
• Major applications Limited to Floorings‐Pavements & Plaster
Poly Fibers Current Usage

10. www.ril.com
FEW INTERESTING AREAS WORLD IS WORKING

11. www.ril.com
1. Shapes can be multi lobal or of three dimensional geometry.
2. Coating/Impregnations of bonding compounds.
3. Aspect ratios can be altered with stiffness.
4. Polyolefin can be exciting.
5. Split able fibers have future after dispersion.
Futuristic Fiber Configurations

12. www.ril.com
• First Stage has been triangular Shape of Fibers which have increased surface area
by 40‐70 %.
• Next generation Fibers will be Multi lobal which will increase surface area by 200‐
300 %.
• Higher Surface Area leads to better bond and make fibers more performance
based.
• Spilt able fibers will be real game changers for concrete composites.
Shapes and Geometry

13. www.ril.com
1. Surfaces can be made absorbent to absorb 10‐15 % which can
enhance bonding of micro fibers.
2. Surface impregnations by Nano Silica‐Sol Gel or silicates will
enhance bonding.
3. Coating which lead to give Hydroxyl groups can enhance and better
reactive voids near fibers.
Coatings‐ Impregnations‐ Surface Deformations

14. www.ril.com
1. Doping of Polymers to create new polyolefin with affinity will be key to better fibers.
2. Co‐Polymers as will evolve next level of fiber innovation.
3. Sensing materials when formed can give signal emitting embedded fibers to give real
time stress strain in localized concrete areas.
4. Polymers in plastic state can be stiff leading to higher aspect ratios >1000 which are
still dispersible.
5. Tensile strength of fibers will need upgrade to take respond to some structural
localized stresses.
Materials & Aspect Ratios

15. www.ril.com
Futuristic Applications
with
Fibers in Concrete

16. www.ril.com
Engineered Cementitious Concrete
1. Application is popularly referred as Bendable Concrete.
2. Mix of cement & Silica with 4 % Volume Fraction of Fiber.
3. Strain Carrying Capacity up 268 times.
4. Tensile Strength goes up by 189 times.

17. www.ril.com
1. Concrete Pavement of 30 mm can be constructed.
2. Floorings of 25-35 mm can be constructed.
3. Thin sectional elements like wall claddings shelves can be constructed.
Applications Areas That Can be Harnessed

18. www.ril.com
Fire Resistance and Reduced Spalling
1. Fire testing is done with 0.2‐0.4 % Volume
Fraction.
2. Ideally Coarser Fibers Have performed
better.
3. Testing is done for 2 hour exposure with
different type of fire Curves as per
requirement for HC & MHC curves

19. www.ril.com
1. Tunneling Shotcrete and Concrete Lining
2. Reinforced Concrete in Hospitals & Critical Buildings in Disaster
Management.
3. Concrete in lift areas and staircases.
4. Fire Proof Precast Like Doors-Partitions.
5. Industrial Concrete with Fire Protection applications.
Applications Areas That Can be Harnessed

20. www.ril.com
Sensing Fiber Optics to Fibers in Smart Concrete
1. Fiber Optic sensors sense for crack‐strain and
corrosion for health monitoring.
2. These systems are add on Fiber usage for sensing as
of now in structures.
3. Mostly these sensors give macro stresses voids‐
cracks‐permeation which can be done by embedding
them or sensing with exterior installations.
4. Prohibitive Costs

21. www.ril.com
Sensing Fibers Systems in Concrete
1. Carbon Nano Tubes are being used with
given schematics.
2. Possible Fiber development on these lines
will give localized stress and health report.
3. NDT Ultrasonics can be used to record from
conductive fibers or emitting fibers.
4. These fibers can be randomly distributed in
concrete specially on critical sections to
record.
5. Applications are immense and on desirable
outcomes.

22. www.ril.com
Durability Equation for Structures with FRC
Test program for Reflex Model

23. www.ril.com
Reflex Model as Derived for Durability
D factor =
f(Permeability) + f(Bulk Diffusion) + f(Corrosion Control) + f(Impact Strength) +
f (Toughness) + f(Abrasion Resistance) + f(Shear Strength) + f(Crack width) +
f( Bond Strength) + f Chloride Diffusivity)

24. For Further Information You are Welcome to contact
www.ril.com
ADDRESS:
Reliance Industries Limited
A-3 Mohan Co-Operative
Industrial Area, Mathura Road
New Delhi PIN-110 076
PHONE:
+91-9910164926
EMAIL:
rajiv.gauri@ril.com
map

25. THANK YOU
www.ril.com

26. www.ril.com
THANK YOU FOR
ATTENDING
Request a copy of our presentations at
www.middleeastconcrete.com/presentations
PLEASE DON’T FORGET TO COLLECT YOUR ATTENDANCE CERTIFICATE