Carbon Fiber Reinforcement OR Carbocrete
-
Upload
naqeeb-khan-niazi -
Category
Engineering
-
view
575 -
download
19
Transcript of Carbon Fiber Reinforcement OR Carbocrete
CARBOCRETE
BS Civil TechnologySection CSemester 7th
Group No 3
Naqeeb Ullah Khan Niazi 107Muhammad Adnan 94Syed M Tajdar Hussain 125Haroon Khan Niazi 56M.Tahir 103
What Is Carbocrete?
History Of Carbon Fibers
Manufacturing Of Carbon Fibers
Carbon Fibers Vs. Steel
Carbon Fibers In Construction
Properties Of Carbocrete
Factors Affecting The PropertiesCarbocrete Against Earthquake
ActivityAdvantages & Disadvantages
Applications
Conclusion
References
OUTLINE
What is Carbocrete?
It is a type
of concrete that
is reinforced with
carbon
fibers so it’s also
known as
“Carbon
Reinforced Concrete”.
It is a new
highly stress able
lightweight composite
construction that
combines
high-streng
th concrete and carbo
n fibers.
It has higher streng
th than steel with quarter of its
weight.
History of
Carbon Fibers
In late 1800s, Thomas Edison
was the first to use carbon fibers as
filaments for early light bulbs.
It lacked the high tensile strength of
today’s carbon fibers; however he used it because of
their high tolerance to heat
which made these fibers ideal for
conducting electricity.
Thomas Edison
Filament
History of
Carbon Fibers
It wasn’t until the late 1950
that high-performance carbon fibers
was manufactured by Mitsubishi
Rayon.
The USA’s Air Force and
NASA didn’t wait develop the carbon
fiber technology and
began to use carbon fiber reinforced
polymers to replace heavy
metals to allow aircrafts to be
lighter and faster.
Carbon fiber aircraft propeller
Raw carbon fiber is made
from petroleum
coal.
These fossil-fuel- based
materials come from either petroleum refining or natural gas
processing.
Manufacturing of Carbon Fibers
Manufacturing of Carbon Fibers
1s
t
: in the thermoset treatment, the fibers are stretched and heated to no more than 400° C
2n
d
: in the carbonize treatment, the fibers are heated to about 800° C in an oxygen free environment to remove non-carbon impurities.
3r
d
: fibers are graphitized; this step stretches the fibers between 50 to 100% elongation, and heats them to temperatures ranging from 1100° C to 3000° C. The stretching ensures a preferred crystalline texture, which results in the desired tensile strength.
4t
h
: the last two treatment steps, surface treatment and epoxy sizing, are preformed to enhance the carbon fiber bonding strength.
Carbon Fibers vs Steel
Up to 75% lighter
More durable
corrosion free
5 times higher tensile
strength
2 times higher
stiffness
Higher temperature tolerance
Carbon Fiber in Construction
Carbon fibers are mostly used for repair purposes of old structural
element against shear and flexure failure; the material know as CFRP.
However, in the early 1990s, researches showed that carbon fibers can be used inside the concrete instead of steel reinforcement showing a significant improvement in the flexural and tensile strength of concrete.
Physical & Chemical Properties of Carbon Fiber
Tenacity 1.8 -2.4 (KN/mm2 )
Density 1.95 gm/cc
Elongation at break 0.5%
Elasticity Not good
Resiliency Not good
Ability to protest friction Good
Color Black
Protection against flame Excellent.
Ability to protest Heat Good
Lustre Like silky
Effect of Bleaching Sodium hypochlorite slightly oxidized carbon fiber.
Effect of Sun light Do not change carbon fiber.
Protection ability against insects Do not harm to carbon fiber.
Factors Affecting the Properties of
FRC
Volume of fiber
Aspect Ratio of fiber
Orientation of fibers
Relative fiber matrix
Workability and Compaction of Concrete
Size of Coarse Aggregate
Mixing
Carbocrete Against Earthquake Activity
What is an Earthquake
An earthquake is the sudden, rapid shaking or rolling of the Earth.
Earthquakes happen when rocks break or slip along fault lines in the Earth’s crust, releasing energy that
causes the ground to move.
SEISMIC WAVES
Seismic waves are the waves of energy
caused by the sudden breaking of rock
within the earth or an explosion. They are
the energy that travels through the
earth and is recorded on seismographs.
Types of seismic waves
Earthquake Measurement Scales
Fiber Reinforcement
AgainstSeismic Loading
These fabrics are installed in buildings, bridges and other
structures.
The result is bonded FRP reinforcement system
engineered to increase the structural performance.
Once installed this system delivers bonded reinforcement
with outstanding long-term physical and mechanical
properties.
Advantages of
Carbon Fiber
High tensile strength
Smaller cross-sections
Earthquake resistance Higher durability
Low weight Easy to handle High flexibility
More creative architectural
design
Suitable for highway
construction
Low coefficient of thermal expansion High fire resistance
Disadvantages of Carbon Fiber
The main disadvantage of carbon fiber is
its cost.
This fiber will cause some
forms of cancer of the lungs.
Lack of knowledge
Absence of codes
No implementation
s yet
APPLICATIONSResidential: Including driveways, basements,,
foundations, drainage, etc.
Commercial: Exterior and interior floors, slabs and parking areas.
Warehouse / industrial: Light to heavy duty loaded floors and roadways
Highways / roadways / bridges: barrier rails, curb.
Ports and airports: Runways, taxiways, aprons, seawalls.
Waterways: Dams, ditches, storm-water structures, etc.
Mining and tunneling: Precast segments which may include tunnel lining, slope stabilization, sewer work, etc.
Agriculture: Farm and animal storage structures, paving, etc.
CONCLUSION
Carbocrete pushed the limits of creativity and flexibility in design.
Made it possible to build unique structures that can withstand very high loads.
Save maintenance costs on the long run.
REFERENCEShttp://www.carbonwrapsolutions.comhttp://www.toray.comhttp://www.biography.comhttp://www.sglgroup.comwww.fiberreinforced.org/pages/applicationshttp://wings.buffalo.edu/academic/department/eng/mae/cmrl/Concrete%20reinforced%20with%20up%20to%20vol%20of%20short%20carbon%20fibers.pdfhttp://www.utsi.edu/research/carbonfiber/cf.htm