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Steel fibers for reinforced concrete kasturi metal
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Transcript of Steel fibers for reinforced concrete kasturi metal
MFG
An ISO 9001:2008 company
Kasturi Metal Composites - Introduction
Visit us @ www.steelfiberindia.in ; www.metalcomposites.comBlog : www.fiberconcrete.in
Agenda
Welcome - Kasturi Metal Composites
Company Introduction Product Portfolio – Types of Concrete Fibers Fiber Reinforced Concrete –
Concept Introduction and Advantages Applications Design Considerations
Product Test Certificates Our Services Our Clients
An ISO 9001:2008 company
Kasturi Metal Composites - Introduction
Head Office
3 separate plants for fiber production
Kasturi Metal Composites - Introduction
Founded in 1999 and incoporated as Pvt Ltd in 2004
Founder - Mr Samit Singhai. (MS -Industrial Engineering, USA)
“Best Industry Award” from Govt of Maharashtra (Twice)
Only Indian company to manufacture
Glued Hook End Steel Fiber
Macro Synthetic Polypropylene Fiber
Unique Services for Flooring Applicators/Contractors
Complete Customized Design Solution – As per Site
Cost Comparison for SFRC Industrial Flooring
Types of Fibers Used Structural Fibers
Steel Fibers: These fibers are generally used for providing concrete with enhanced toughness and post-crack load carrying capacity. Dia varying from 0.5 mm to 1 mm and length from 25 mm to 60 mm Tensile Strength from 500 Mpa to 2500 Mpa Dosage varying from 12 kg cum to 50 kg cum.
Macro-synthetic fibers: This newer class of fibers has emerged over the past 15 years as a suitable alternate to steel fibers when dosed properly. Typical materials include polypropylene Dia Varying from 0.6 mm to 1mm and length from 35 mm to 65 mm Tensile Strength varies from 320 Mpa to 650 Mpa. Dosage varying from 1 kg cum to 7 kg cum.
Non- Structural Fibers Micro-synthetic fibers: These fibers are generally used for the protection and mitigation of
plastic shrinkage cracking in concrete. Most fiber types are manufactured from polypropylene, polyethylene, polyester, nylon etc Length varying from 5 mm to 25 mm Tensile Strength varies from 320 Mpa to 450 Mpa. Dosage varying from 100 gms cum to 1 kg cum
Product Portfolio – Polypropylene FibersAs per ASTM C1116
Micro Monofilament PP Fibers Micro Fibrillated PP Fibers
• Level 1 - reinforcement
• Non – Structural Fibers
DurocreteTM Micro PP Fibers
Product Portfolio – Steel FibersAs per ASTM A820 M04 Standards
Glued Hook End Steel Fibers Loose Hook End Steel Fibers
Flat End Steel Fibers
• Level 2 - reinforcement
• Structural Fibers – Steel
Product Portfolio
Macro Synthetic PP Fibers
• Level 3 - reinforcement
• Structural Fibers – Macro Synthetic and Steel Blend
Hook End Steel Fibers
Fiber Reinforced Concrete – Introduction Why does Concrete needs Reinforcement ? Fiber Reinforced Concrete Benefits of Fiber Reinforced Concrete Application of FRC DURAFLEX – as an advantage
Concrete Reinforcement
Why does concrete needs reinforcement ? Concrete is brittle in nature and tends to
shrink slightly both during and after curing Thermal Contraction and expansion due to
temperature and moisture changes. Plastic shrinkage occurs at the surface and
volumetric changes cause internal stresses within the concrete matrix
To provide additional tensile strength to the internal structure - Rebar and Welded Wire Mesh are used (Conventional Reinforcement)
IS THIS METHOD OF PRIMARY REINFORCEMENT ADEQUATE ????
Cracks Formation
Chips Formation
Major Issues with Industrial Flooring due to Internal Stresses
Solution : Fiber Reinforced Concrete
Turns Brittle material into ductile
Intercepts micro-cracks as they form and continue to provide tensile capacity across the cracks.
THE FIBRE ADVANTAGE
Continue to bridge crack, pulling concrete on either side of crack
FRC clearly affects the post cracking behavior of reinforced concrete – MORE TOUGHER MORE IMACT RESITANCE MORE LOAD CARRYING CAPACITY
Offer
High-Tech Protection
against
CRACKING ! CRACKING !
STEEL FIBRESSTEEL FIBRES
Conventional Reinforcement
Provides single point crack restraint only
Control micro-cracking in hardened Concrete
Steel fiber reinforced concrete
Steel fiber reinforced concrete
• Provide continuous crack restraint– From bottom of slab to just below surface
SETTLEMENT
Plain ConcretePlain ConcreteVARIABLE BLEEDING & SUPPORT
Steel Fiber ConcreteSteel Fiber Concrete
STEEL FIBER REDUCES BLEEDING & SETTLEMENT RESULTING IN A MORE HOMOGENIOUS MIX
VV Rebar / Wire MeshRebar / Wire Mesh• 3 Dimensional Reinforcement
• Always placed correctly
• Reinforces against shrinkage cracking.
• Reduces Bleeding & Settlement.
• Improves Impact & Abrasion Resistance.
• Provides Shatter & Spalling Resistance.
• Reduces Permeability
• Improves Freeze/Thaw Resistance.
• Provides Resistance to Explosive Spalling.
• Induced Joints recommended at 6m centres.
• 2 Dimensional Reinforcement
• Difficult to place correctly
• Controls Cracks once they have occurred
• Induced Joints recommended at 10m centres.
STEELSTEEL FIBRESFIBRES
SFRC Properties
COMPRESSION
FLEXURE SHEAR
Compression
Compressive Strength Equals 28 MPa
Compressive Strength is Marginally Enhanced
Compressive Strain Behavior IS Enhanced
SFRC Properties
Load Vs Deflection : Toughness Test
SFRC Properties
ASTM C 78
Flexural Strength Equals 5.2 MPa
Flexural Strain Capacity IS Enhanced
Impact
SFRC Properties
Impact Resitance
Plain 0.5 0.1 1.5 2
Dosage Percentage
Num
ber o
f Blo
ws
to fa
ilure
SFRC Properties
SFRC Vs Normal Concrete
MIX DESIGN FOR S.F.R.C.
Cement Content 300 - 500 Kg/m3
Water cement ratio 0.45 to 0.60
Ratio of sand to total aggregates as percent
50 to 100
Max. size of aggregate 10 to 20 mm
Fiber aspect ratio 50 to 100.
Fiber content 15 kg to 30 Kg/m3
Sample MIX
Major Application – Industrial Flooring
Flooring applications include
Industrial Floors Warehouse and Cold Storage Floors
Ports and Dockyards Airport Runways
Residential township Internal Roads Cement Factories
Roads and Pavements Workshops and Garages
To the Contractor Reduced labor cost Decreased Schedule Time
Steel fibres installed in 5 minutes vs long hours taken by wire mesh
Truck can be driven up to forms and may eliminate the need for pumps
Faster construction Easy to handle Environmentally friendly packing Supports Laser Screeds, Vibratory Screeds
and compatible with all types of conventional tremix equipments.
Benefits of SFRC Floors
To the Owner Low cost of construction High quality - Eliminates concern that mesh is not in the
right place - Stops micro cracks propogating into macro
cracks - Reinforces the edge helping to prevent
joint failure - Provides high impact resistance - Excellent surface finish can be achieved - Eliminates spalling due to corroding
reinforcement
Benefits of SFRC Floors
Benefits of SFRC Floors
To the Consultant
Design validated by performance tests. Proven performance in the field. Fully detailed design guide as per standard codes. Full support for Site mixing, Laying and Finishing.
Renowned Name – Largest Manufacturer in India
Lead Sharing – Working Together Complete Design Assistance Cost Comparison with Best Economical
Design as per the site requirement On Site Assistance Trading Opportunities – Channel Partner www.fiberconcrete.in – knowledge sharing
platform(bringing experts and research together)
Advantage Kasturi
Duraflex™ Steel Fibers- Advantage
Stringent Quality Control Processes : QMS Tensile Strength always maintained above 1100 Mpa.
(Regular available in market around 800-1000 Mpa) Correct Anchorage and Aspect Ratio (L/D) maintained. Packaged in a special waterproof Packaging bag
Test Certificates – Flexural StrengthTested at IIT-Roorkee Dep of Earthquake Eng
Our Services
On Site technical Assistance
Customized Design Solutions along with Cost Comparison
Wide Applicator Network
Fiber for varied application – Largest Producer
Few of Our Esteemed Corporate Clients
And many more……….
Thank you !
We appreciate your attention.