presentation of precast concrete

1. Properties of precast
concrete
GROUPMEMBER H.T
NO
ASHIKHASSAN
15D05A0108
HABIBKOUSHWAR
15D05A0109
MDFAIZAN ALAM
14D01A0128
MOJ

2. INTRODUCTION:
• The concept of precast (also known as “prefabricated”)
construction includes those buildings, where the majority of
structural components are standardized and produced in
plants in a location away from the building, and then
transported to the site for assembly. These components are
manufactured by industrial methods based on mass
production in order to build a large number of buildings in a
short time at low cost.
• Precast concrete is a construction product produced by
casting concrete in a reusable mold or "form" which is then
cured in a controlled environment, transported to the
construction site and lifted into place

3. Precast concrete
• Enables faster programme times - not affected
by weather or labour shortages.
• Improves buildability - early enclosure of dry
envelope enables follow-on trades to start sooner.
• Produces a high standard of workmanship in
factory conditions - reduces potential for
accidents, addresses on-site skill shortage.
• Has a high quality finish that can be left exposed
- concrete's thermal properties can be exploited
in low-energy buildings.

4. PRIMARY FUNCTIONS
• KEEP WATER OUT
• PREVENT AIR LEAKAGE
• CONTROL LIGHT
• CONTROL RADIATION
OF HEAT
• CONTROL CONDUCTION
OF HEAT
• CONTROL SOUND
SECONDARY FUNCTIONS
• RESIST WIND FORCES
• CONTROL WATER VAPOR
• ADJUST TO MOVEMENT
• THERMAL & MOISTURE
EXPANSION/CONTRACT
ION
• STRUCTURAL
MOVEMENTS
• RESIST FIRE
• WEATHER GRACEFULLY
• EASY TO INSTALL

5. Architectural precast concrete provides
architects with an exciting medium when
designing facades for a wide range of buildings,
from healthcare facilities to shopping malls,
commercial office buildings to sports stadiums.
Precast concrete provides:
• Complete thermal protection
• Continuous air/vapour barrier
• Effective rain screens
• Superior lifespan
• Reduced construction schedule and on-site
labour
• High quality control standards

6. Why?
Why precast concrete
structure is getting more
success day by day?
The truth is here-
•Economical and best
•Structural efficiency
•Flexibility in use
•Optimum use of materials
•Speed of construction
•Quality consciousness
•Adaptability
•Protection of the environment
•Less labor requirement
•Smooth surface finishing

7. Properties of precast
• Flexibility of
shape and form
• Quality control
• Strength
• Durability
• Fire resistance

8. Flexibility of shape and
form
• Concrete can be molded into any
shape .This capability can be used to
provide custom made design solutions
to specific problems.

9. Quality Control
Because precast concrete products typically
are produced in a controlled environment,
they exhibit high quality and uniformity.

10. StrEnGtH
Precast exterior cladding can easily
be designed to handle structural building
loads, thereby reducing the need for other
structural components.

11. DURABILI
TY
Precast concrete has
more durability because
of superior material uses
and manufacturing with
proper skills.

12. advantaGES of
PrECaSt ConCrEtE
• Less expensive than real brick.
• Does not require an extensive footing
like a real masonry wall. Can be reset
should it ever shift.
• More durable than real masonry - no
mortar joints to let water in.
• Installs quickly and easily - most can
be done in one day.
• Maintenance free - No need to paint
or periodically replace slats as you
would with wood fences.

13. Disadvantage of precast
concrete
• System building is less flexible in its design
concept than purpose-mode structures
• Most design briefs can be fulfilled without
too much modification to the original
concept
• Structural connection between the precast
concrete units can present both design &
contractual problems

14. CONCLUSIO
N
• Pre-fabrication has a great potential to
respond to new market demands. Possible
solution lie not only within the classical
advantages related to working conditions,
technology & speed of construction, but
also in new developments of materials such
as high performances & self-compacting
concrete, buildings system such as mixed
structures, manufacturing technology,
automation, service integrated products &
others

15. THANK YOU