Mostly All
know that the concrete is well strong in compression.
The rebars sytem is higly good, that the
best use to make slab.
The
rainforced bar system is design by the engineers. The engineers provides
detail of the number of reinforcement.
The
Different type of load on concrete
building as horizontal, compression, lateral and
torsion.
The structure
is dependent on the method by the
Engineers and employed to install the reinforcement bar
system. The reinforcement bars are mainly conect to proper bonding with the
concrete.
Operations in Rebaring for
Reinforced Concrete Works
The main operations carried
out in rebaring for reinforced concrete construction bars are cutting,
bending and tying. The reinforcement bars used reinforced concrete work mainly
different-2 ranges but its mainly from 6 to 42mm. These type of reinforcement
bars come from the steel mill in particular lengths.
So, during installation, the
reinforcement bars must be used only required size. The design shows by the
engineer the details about the bars bending and related works, based on which
proceed the work. The rigid connection Provides to all the members of the
rebars.
Necessity of Rebaring Technique in Reinforced
Concrete Construction
The steel reinforcement mostly is divided into two categories
i.e.
·
Primary Reinforcement or Main Steel reinforcement
·
Secondary reinforcement or distribution reinforcement
The reinforcement bars system works on
limited cracking. The cracking is depend upon the temperature variations. The employee is specified diameter are bent at the
ends. The Main Bar are used in beams, columns , slab etc.
Mostly stirrups are circular, square, rectangular, helical or diamond shape based on the
cross-section of the element. The bar in the corners may be L shaped.
Equipments used for Rebaring
Techniques
The equipment are used for rebaring
system with time to time, like the size of bar. The Larger bars is very
difficult to handle by hand opreation.
Mostly employee used hammer and chisel
for bar bending.The bar is held fixed with the help of three thick bars over a
bar bender bench.then the binding is proper used in manual force and levers. to
tie the roads and cutting holes are used, tie by the steel wire.Drill hole are
use to fix the iron rod with the chemicel and make different-2 joints by engineer design.
How Is
Rebarring Done
•Drill Hole in
Concrete based on design
•Fill it with
chemical
•Insert rebar and
allow for chemical curing
A)
Simply
Supported Connections
•Adding beam between
columns
•Casting slab in a cutout
B) Spliced Connections
•Extension of column
•Extension of beam/
slab
•Casting slab in a cutout
C) Moment Connections
•Column from Raft/
Pile cap
•Cantilever beam from
column
•Bracket on column
D) Shear Connectors
•Thickening of slabs/
raft
•J bolting while jacketing
Rebar
Grouting Outcome
• No damage to
existing concrete (Cost saving on prepare & repair)
• Precise controlled
application (Quality of work & Speed)
• Flexibility in designs
Role of
Designer
To Provide Safe Design
• Right Embedment
depth
• Right Steel details
• Right chemical
Beyond
Design
Chemical
Selection may depend on parameters like:
•Temperature range
(long/ short)
•Drilling method
•Effect of chemicals
•Creep Behaviour etc…
Special Care in
Application with Deep Embedment
•Proper Cleaning
•Usage of Piston Plug
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