Fiber Reinforced ConcreteFiber Reinforced Concrete(FRC)(FRC)

Feisal salahFeisal salah Introduction Introduction

Is a concrete mix that contains short discrete fibers, Is a concrete mix that contains short discrete fibers, uniformly distributed and randomly oriented uniformly distributed and randomly oriented

Aims to produce stronger and tougher concrete

Can add to the tensile loading capacity of the composite system

4 types of FRC:4 types of FRC: Steel Fibers (SFRC)

Glass Fibers (GFRC)

Synthetic Fibers (SFRC)

Natural Fibers (NFRC)

AdvantagesAdvantages

Ease of installationEase of installation

Concrete placement and crack control Concrete placement and crack control in one operationin one operation

No requirement for crack control steel No requirement for crack control steel meshmesh

Increased cohesion of the mixIncreased cohesion of the mix

Reduced bleeding of water to the Reduced bleeding of water to the surfacesurface

DisadvantagesDisadvantages

Greater reduction of workabilityGreater reduction of workability

High cost of the materialsHigh cost of the materials

Steel Fiber Reinforce ConcreteSteel Fiber Reinforce Concrete

Increases strain capacity and impact Increases strain capacity and impact resistanceresistanceImproved resistance to impact and greater Improved resistance to impact and greater ductility of failure in compression, flexure ductility of failure in compression, flexure and torsionand torsionHigh tensile strength (0.5 – 2 GPa)High tensile strength (0.5 – 2 GPa)Modulus of elasticity (200 GPa)Modulus of elasticity (200 GPa)Ductile/plastic stress-strain characteristicDuctile/plastic stress-strain characteristicLow creepLow creep

Glass Fiber Reinforced ConcreteGlass Fiber Reinforced Concrete

Mixed by Portland cement, fine Mixed by Portland cement, fine aggregates, water and alkali-resistant aggregates, water and alkali-resistant glass fibersglass fibers

High tensile strength (2 – 4 GPa)High tensile strength (2 – 4 GPa)

Elastic modulus (70 – 80 GPa)Elastic modulus (70 – 80 GPa)

Brittle stress-strain characteristics (2.5 – Brittle stress-strain characteristics (2.5 – 4.8% 4.8% elongation at break)elongation at break)

Low creep at room temperatureLow creep at room temperature

Synthetic Fiber Reinforced Synthetic Fiber Reinforced ConcreteConcrete

Man-made fibers from petrochemical and Man-made fibers from petrochemical and textile industriestextile industries

Low-volume percentage (0.1 to 0.3% by Low-volume percentage (0.1 to 0.3% by volume)volume)

high-volume percentage (0.4 to 0.8% by high-volume percentage (0.4 to 0.8% by volume)volume)

Selected Synthetic Fiber Types and Selected Synthetic Fiber Types and PropertiesProperties

Types of Types of Synthetic Fiber Synthetic Fiber Reinforced ConcreteReinforced Concrete

Acrylic Acrylic AramidAramidCarbonCarbonNylonNylonPolyesterPolyethylenePolypropylene

Natural Fiber Reinforced Concrete

Obtained at low cost and low levels of Obtained at low cost and low levels of energy using local manpower and energy using local manpower and technologytechnologyUnprocessed natural fibersUnprocessed natural fibers- - made with unprocessed natural fibers such as made with unprocessed natural fibers such as coconut coir, sisal, sugarcane bagasse, bamboo, jute, coconut coir, sisal, sugarcane bagasse, bamboo, jute, wood and vegetablewood and vegetable

Processed natural fibersProcessed natural fibers - - Wood cellulose is the most frequentlyWood cellulose is the most frequently

Typical Properties of Natural FibersTypical Properties of Natural Fibers

Application of FRCApplication of FRC

Applications for new constructionApplications for new construction Bridge Bridge

Repair and rehabilitation applicationsRepair and rehabilitation applications Beam and SlabBeam and Slab

Architectural applications Architectural applications Interior DesignInterior Design

Use of Carbon FRC as reinforcement of a concrete slab

ComparisonComparisonFiber Reinforced Concrete (FRC)Fiber Reinforced Concrete (FRC) Normal Reinforce ConcreteNormal Reinforce Concrete

Higher durability Higher durability Lower durabilityLower durability

Protect steel from corrosionProtect steel from corrosion Steel potential to corrosionSteel potential to corrosion

Lighter (materials)Lighter (materials) Heavier (materials)Heavier (materials)

More ExpensiveMore Expensive Economical Economical

With the same of volume, the With the same of volume, the strength is greaterstrength is greater

With the same of volume, the With the same of volume, the strength is less.strength is less.

higher workabilityhigher workability Less workability as compare to Less workability as compare to FRPFRP

ConclusionConclusion

FRC - FRC - very costlyvery costly

- - normally apply on bridge constructionsnormally apply on bridge constructions

- - the ability to sustain a load withoutthe ability to sustain a load without

excessive deformation or failureexcessive deformation or failure

- - used as external reinforcement in the used as external reinforcement in the

rehabilitation of reinforced concrete (RC)rehabilitation of reinforced concrete (RC)

beams and slabsbeams and slabs

- - architects used it as siding/cladding,architects used it as siding/cladding,

roofing, flooring and partitions roofing, flooring and partitions