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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