CEL 774 CONSTRUCTION PRACTISES

Concrete: Production
(Pre-fabrication )

B. Bhattacharjee
CIVIL ENGINEERING DEPARTMENT
IIT DELHI

DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI
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Definition
– PREFABRICATION REFERS To
PRODUCTION AWAY FROM ACTUAL
SITE OF CONSTRUCTION.
– WITH REFERENCE TO PRE CAST
CONCRETE CASTING IS DONE IN ONE
PLACE AND IS USED ELSEWHERE

DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI
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Advantages
• ADVANTAGES OF PRECAST CONCRETE
PARALLEL ACTIVITIES, REDUCED TIME
• FACTORY LIKE BETTER QUALITY CONTROL
EXPERIENCE GAINED BY WORK FORCE
THROUGH R EPETATIVE WORKS.
• STANDARDIZATION Is POSSIBLE, ADVANTAGES
OF MODULAR COORDINATION CAN BE
REALIZED.
• IN THE LONG RUN IT MAY BE ECONOMICAL
• TECHNOLOGICALLY ADVANCED INDUSTRIALIZED
CONSTRUCTION AND APPLICATION OF
ROBOTICS IS POSSIBLE
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI
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Disadvantages
– BUSINESS SUSTAINABILITY IS
MARKET DEPENDENT
– CAN INTRODUCE MONOTONY, MAY
NOT BE PLEASANT TO LOOK AT

DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI
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TYPES OF PREFABRICATION PLANT

– PERMANENT PLANT
– FIELD PLANT
– FABRICATION ON A BUILDING SITE

THREE MAIN GROUPS OF ACTIVITIES
1) MAIN PRODUCTION ACTIVITY
2) AUXILIARY PRODUCTION ACTIVITIES
3) MANAGERIAL, TECHNICAL AND
GENERAL SUPPORT
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI
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LAYOUT

B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

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CAPACITY & SYSTEMS
– Q = MIn (Q,, Q2 , Q,.-.)
– Q = Qz = Q 3+. = Q
TWO BASIC TYPE OF PRODUCTION
SYSTEMS
1)STATIONARY MOULD,
2)MOVABLE MOULDS

DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI
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STATIONARY
&
MOVABLE
MOULDS

B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

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MOVABLE MOULDS

B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

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ELEMENTS HANDLING
RAILMOUNTED GANTRY (PORTAL)
CRANE, WHEEL MOUNTED GANTRY
CRANES
OVERHEAD CRANES
TOWER CR AN ES
MOBILE CRANES
B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

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STORAGE CAPACITY
– THE STORAGE CAPACITY OF STOCKYARD THE
MINIMUM TIME NECESSARY For CONCRETE TO
DEVELOP s u FF | ((E/y T STRENGTH PRIOR TO
ERECT | ON (T 1) AL = TI Q
– AN ADDITIONAL BUFFER STORAGE FOR POSSIBLE
INTDRRUPT lou OF PRODUCTION AT CAST IN a
YARD OR PLANT. Tz DAYS ERE (Tom is THE B/31=F/IR A 2 = Tz Q
– INTERRUPTION OF ERECTION ON SITE CAN BE
ACCOUNTED FOR Tz DAY s A 3 = T 3 Q
– A FLEXIBILITY OF PRODUCTION PLANNING

B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

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B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

12

B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

13

B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

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B. Bhattacharjee
DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI

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THANK YOU FOR
HEARING

DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI
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