Gypsum as a building material used in drywall's of buildings . its uses , casestudies , advantages and disadvantages

1. PRECAST CONCRETE
DRY WALL
SUB. BY :- DENIS PATEL
DHARA PATEL
HARSHIL PATEL
JAY SONI
KATHANI PATEL
SATYAM PRAJAPATI
SUB TO : SANDIP SIR

2. PRECAST CONCRETE
Precast concrete is construction product produced by casting
concrete in a reusable mold or “form” which is then cured in a
controlled environment , transformed to the construction site
& lifted into placed . In contrast , standard concrete is poured
into site-specific forms & cured on site.
Precast stone is distinguished from precast concrete by using
fine aggregate in the mixture, so the final product approaches
the appearance of naturally occurring rock or stone.
The precast concrete is afforded the opportunity to properly
cure & be closed monitored by plant employees.
Using a precast concrete system offers many potential
advantages over onsite casting.

3. ADVANTAGES
• Aesthetically Pleasing
• Superior Strength & Durability
• Safety and Protection
• Ease of Installation
• Consistent Quality
• Reduced Weather Dependency
• Environmentally Friendly
• Weather and UV Resistance
• Energy Savings
• Modularity
• Availability
• Efficiency
• Low Maintenance

4. 1. Aesthetically Pleasing
Precast panels can be produced in virtually any colour and a wide variety of finishes
to achieve the desired appearance.
2. Superior Strength & Durability
Strength gradually increases over time.
•Exterior cladding panels can easily be designed to handle structural building loads,
thereby reducing the need for other structural components.
•Does not deteriorate, experience creep and stress relaxation, lose strength and/or
deflect over time
3. Safety and Protection
Precast concrete provides excellent protection against impacts from explosions,
vehicles and projectiles
Precast concrete wall panels have passed tornado/hurricane impact testing, giving
owners an added level of safety assurance in areas prone to severe weather.
4. Energy Savings
Precast concrete has excellent R-value insulation properties, which can be
enhanced with embedded Styrofoam (sandwich panels).

5. 5. Ease of Installation
Precast concrete panels have a distinct advantage over other materials such
as brick, concrete masonry, casting-place concrete and EIFS.
Because precast panels are manufactured well in advance of installation, they
are ready for transportation to the job site at a moment’s notice
6. Consistent Quality
Because precast concrete products are typically produced in a controlled
plant environment, they exhibit high quality and uniformity. •Problems
affecting quality typically found on a job site – temperature, curing
conditions, craftsmanship and material quality – are nearly eliminated in a
plant environment.
7. Reduced Weather Dependency
•Precast concrete increases operating efficiency, because weather will not
delay production.
•Weather conditions have a reduced effect on the schedule because precast
requires less time to install than alternative methods such as cast-in-place
and EIFS.

6. 8. Environmentally Friendly
Besides water, concrete is the most frequently used material on earth.
•It is nontoxic, environmentally safe and composed of natural materials
9. Weather and UV Resistance
Precast concrete is well-suited for all types of weather conditions.
•In regions with regular freeze-thaw cycles, the mix can be designed to withstand
damage.
•Precast concrete does not degrade from exposure to sunlight.
10. Modularity
Because of the modular nature of precast concrete products, buildings of nearly any size
can be accommodated.
•Precast products are designed snd manufactured for simple connection to reduce
installation time
11. Availability
With hundreds of manufacturers throughout North America, precast concrete wall
panels can be ordered from most cities and regions.
•Products are made in advance and readily available when needed at the job site.
•Ensures a competitive market and a ready supply.

7. DISADVANTAGES
• Very heavy members
• Camber in beams & slabs
• Very small margin for error
• Connections may be difficult
• Somewhat limited building design flexibility because panel size is
limited, precast concrete can not be used for two way structural
systems.
• Economics of scale demand regularly shaped buildings.
• Needs for repetition of forms will affect building design
• Joints between panels are often expensive & complicated
• Skilled workmanship is required in the application of the panel on site
• Cranes are required to lift panels.

8. INSTALLATION TO WALLS
- METHOD 1
The attachment of the concrete panel to
the structure is made by: - Steel rod
anchors - Angle support clip – Bolts
- Slightly flex is needed to permit small
amounts of relative movement
between the facing and the frame.
- Attachment must transfer all the wind,
gravity, and seismic forces on the panel
to the building frame.

9. - METHOD 2
- The other attachment style for Glass fiber reinforced concrete curtain wall:
- Very thin layer of Glass fiber reinforced concrete is attached by backer rods
and sealant.
- Typical connections of Glass fiber reinforced concrete panels to a steel building
frame.

10. CORNER DETAILS
Corner Details
- Concrete panels are mold to L shape.
Or
- Mold with an angle edge.

11. Sample flat of size 320 sq. mtr.
•Structurally fabricated
skeleton of structural steel
installed at site over
conventional plinth.
•All internal walls in gypsum
plasterboard
•External walls with cement
fiber boards & internal
lining of the external wall with
gypsum plasterboard.
PANCHSHIL NORTH

13. NET CASESTUDY OF PRECAST CONCRETE
NAKAGIN CAPSULE TOWER
Architect: Kisho Kurokawa
Location: Tokyo, Japan
Project Year: 1972

14. - It is a prototype for architecture of sustainability and recycleability, as
each module can be plugged in to the central core and replaced or
exchanged when necessary.
- The tower had a design period of only four months- shorter than usual,
and it was rushed. The designing went on even after construction had
already started.
- Each unit to be installed to the concrete core with only 4 high-tension
bolts, which keeps the units replaceable.

15. - All pieces of the pods were
manufactured in factory then
transported to the site by truck.
- The capsules were inserted in the
shipping containers by use of a
crane, and then fastened to the
concrete core shaft.

17. THEROTICAL V/S ACTUAL

18. CLIMATE EFFECT