ARHAM VEERAYATAN INSTITUTE OF ENGINEERING, TECHNOLOGY & RESEARCH

FIBER REINFORCE CONCRETE AND POLYMER CONCRETE

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PRESENTED BY KOTADIYA URVISH(150920106001)KATHIRIYA VISHAL(150920106003)VYAS KEYUR (150920106004)

TOPIC

1. Fiber reinforce concrete

- introduction

- Types of Fibers

- Factor affecting properties of FRC

- Advantages

- Disadvantages

- Application

4 May 2017

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TOPIC

1. polymer concrete

- introduction of concrete

- introduction of polymer

-introduction of polymer concrete

-classification of polymer

-types of polymer concrete

-Advantages

-Disadvantages

-Application 4 May 2017

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• Fiber Reinforce Concrete

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INTRODUCTION

Fiber reinforced concrete (FRC)

is concrete containing fibrous material

which increases its structural integrity.

It contains short discrete fibers that are

uniformly distributed and randomly

oriented.

Fibers include steel fibers, glass fibers,

synthetic fibers and natural fibers.4 May 2017

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Synthetic fibersGlass fibers

Steel fibers

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Plain cement concrete Fiber reinforce concrete

TYPES OF FIBERS

1. Steel fibers

2. Glass fibers

3. Plastic fibers

4. Carbon fibers

5. Asbestos fibers

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They are generally round.

The diameter may vary from 0.25 mm to 0.75 mm.

Use of steel fiber makes significant improvements in flexural impact

strength of concrete.

This may be avoided by adding fibers bundles, which separate during

the mixing process.

1. steel fibers

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Steel fibers

2. Glass fiber

Glass fiber is made up from 2000 - 4000 individual filaments which are

lightly bonded to make up a stand.

Using the conventional mixing techniques for normal concrete, it is not

possible to mix more than about 2% (by volume) of glass fibers up to a

length of 25mm.

Glass fiber reinforced concrete is mostly used for decorative application

rather than structural purposes.

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Glass fiber4 May 2017

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3. plastic fiber

Fibers such as polypropylene , nylon, acrylic, aramid and polyethylene have

high tensile strength but low young’s modulus thus inhibiting reinforcing effect.

The amount of plastic fibers added to concrete is about 0.25 to 1 percent by

volume.

Polypropylene and nylon fibers are found to be suitable to increase the impact

strength.

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polypropylene

polyethylene Nylon

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aramidacrylic

4. carbon fiber

Carbon fiber comes under the low modulus of elasticity and high flexural strength.

Their strength & stiffness characteristics have been found to be superior even to

those of steel.

But they are more vulnerable to damage than even glass fiber

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Carbon fiber

5.Asbestos fiber

The naturally available inexpensive mineral fiber, asbestos, has been

successfully combined with Portland cement paste to form a widely used

product called asbestos cement.

The maximum length of asbestos fiber is 10 mm but generally fibers are

shorter than this.

The composite has high flexural strength.

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Asbestos fibers4 May 2017

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FACTORS AFFECTING OF FRC

1. Volume of fiber

2. Size of coarse aggregate

3. Workability and compaction of concrete

4. Mixing

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1. Volume of fibers

it has been found that increase in volume of fibers, increase approximately linearly tensile strength and toughness of the concree

2. Size of coarse aggregate

investigations showed that the maximum size of the coarse aggregate should not exceed 10 mm, to avoid appreciable reduction in strength of the composite.

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3. Workability and compaction of concrete

poor – workability adversely affect the compaction of concrete. Another consequence of poor workability is non-uniform distribution of the fibers in the mix.

4. Mixing

avoid segregation.

Cement content : 325 to 500 kg/m3

w/c ratio : 0.4 to 0.6

Maximum size of C.A. : 10 mm

Sand content, % of total aggregate : 50 to 100 %

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ADVANTAGES OF FRC

Improves toughness of concrete

Flexural strength is improved by up to 30% by decreasing the propagation of cracks

Improvement in bond strength

Reduction in shrinkage and cracking

Lower permeability of concrete

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Low Modulus of Elasticity

More Expensive than Steel

Coefficients of Thermal Expansion are Different than Those of Steel or

Concrete

DISADVANTAGE OF FRC

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1. Precast products

2. Water retaining structures

3. Repairs and rehabilitation work

4. Pavement and floors

5. Culvert/wearing surface to existing bridges

APPLICATION OF FRC

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• Polymer Concrete

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TOPIC

1. polymer concrete

- introduction of concrete

- introduction of polymer

-introduction of polymer concrete

-classification of polymer

-types of polymer concrete

-Advantages

-Disadvantages

-Application 4 May 2017

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INTRODUCTION OF CONCRETE

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concrete is porous

The porosity is due to air-voids, water voids or due to the inherent porosity of gel

structure itself.

Reduces strength.

reduction of porosity results in increase of strength of concrete

vibration, pressure application spinning ,none of these methods could really help to

reduce the water voids and the inherent porosity of gel, which is estimated to be about

28%.

INTRODUCTION POLYMER

Poly – many ,Mer – unit ( monomer )

Polymer = many monomer

Polygon = many sided figure

Polytechnic = many technical subject

Polyunsaturated = many double bonds

A monomer is a molecule that able to bond in long chains.

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INTRODUCTION OF POLYMER CONCRETE

Polymer concrete is a mixture of aggregate with a polymer as the sole binder.

There is no other bonding material present. i.e.:- Portland cement is not used

It is manufacture in a manner similar to that of cement concrete

Monomer or pre – polymer are added to the graded aggregate and the mixture is thoroughly mixed by

hand or machine. also know as resin concrete.

monomer used

- methyl – methacrylate

- polyester – styrene

- styrene

- furfuryl acetone etc.4 May 2017

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MONOMERS

(GROUP OF MONOMERS)

POLYMERS

SYNTHETIC(DERIVED FROM PETROL,OIL)

THERMOSETTING(HIGH TEMPERATURE)

THERMOPLASTIC(NOT SUITABLE FOR

HIGHTEMPERATURE)

NATURAL(AVAILABLE NATURALLY SOURCE

LIKE WATER)

ORGANIC(WITHOUT CARBON)

CELLULOSE,NUCLEIC ACIDS

INORGANIC(CARBON)

DIAMOND,GRAPHITE

CLASSIFICATION OF POLYMERS

POLYMER CONCRETE

1. POLYMER PORTLAND

EMENT CONCRETE2. POLYMER CONCRETE

3. POLYMER

IMPREGNATED CONCRETE

TYPES OF POLYMER CONCRETE

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1. POLYMER PORTLAND CEMENT CONCRETE (PCC)

Polymer cement concrete is made by mixing cement, aggregates, water and

monomer.

Polymer Portland cement concrete is a conventional Portland cement concrete

which is usually made by replacing a part of the mixing water with a latex( polymer

emulsion )

Also know as latex – modified concrete

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Polymer employed in lattices

Elastometric polymers

They are characterized by their rubber –

like elongation and low modulus of

elasticity

- natural rubber latex

- styrene – butadiene rubber latex

- neoprene

glassy polymers

They are characterized by higher strength,

higher modulus of elasticity and relatively

brittle type of failure.

- polyester – styrene

- epoxy – styrene

- furans

- Vinylidene chloride4 May 2017

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Styrene𝐶8𝐻8

Epoxy styrene 𝐶8𝐻8O

C5H8O2

furfuryl acetoneC8H10O

Natural rubber latex

Vinylidene chloride(C2H2Cl2)n

AcrylonitrileC3H3N

monomers

2. POLYMER CONCRETE (PC)

Polymer concrete is a mixture of aggregate with a polymer as the sole binder.

There is no other bonding material present. i.e.:- Portland cement is not used

It is manufacture in a manner similar to that of cement concrete

Monomer or pre – polymer are added to the graded aggregate and the mixture is thoroughly mixed by

hand or machine. also know as resin concrete.

monomer used

- methyl – methacrylate

- polyester – styrene

- styrene

- furfuryl acetone etc.4 May 2017

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3. POLYMER IMPREGNATED CONCRETE (PIC)

A polymer impregnated concrete is produced by impregnating or infiltrating a

hardened Portland cement concrete with a monomer and subsequently

polymerizing the monomer in situation.

It is one of the widely used polymer composite.

The partial or surface impregnated improves durability and chemical resistance while

total or in – depth impregnation improves structure properties of concrete.

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Mainly the following types of monomer are used:

(a) Methyl meth acrylate (MMA),

(b) Styrene,

(c) Acrylonitrile,

(d) t-butyl styrene,

(e) Epoxy

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ADVANTAGES

Rapid curing at ambient temperatures

Good resistance against corrosion

High tensile ,flexural and compressive strengths

Good adhesion to most surfaces

Good Long term durability

Good chemical resistance

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DISADVANTAGES

Small boxes are more costly

Some safety issues arise out of the use of polymer concrete.

The monomers can be volatile, combustible, and toxic.

which are used as catalysts, are combustible and harmful to human skin.

The promoters and accelerators are also dangerous.

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Using of polymer concrete on old concrete

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APPLICATION

• Used for industrial structures and rehabilitation.

• Solid surface countertops for modern kitchens and baths.

• It can be used for manufacturing electrical poles.

• With its decorative finishes and polymer concrete is ideal for many ornamental applications

including park benches, outdoor furniture.

• Commonly used in areas subject to heavy wear and high loadings such as car parks, roadways

and industrial areas.4 May 2017

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Thank you

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