ground and upper floor

1. S L A B
P R E S E N T E D B Y -
- TOUKIR AHMED SHISHIR (11205053)
- KAMAL KANTI MONDAL PAPPU (13205053)
- MD. MANTASA RAHMAN (14105002)
- MD. OMOR FARUK (15205018)
- NAFEES SHAHRIAR SHUVO (15205039)
- NUR MOHAMMAD KAZIUL KUZZAT (16205001)
- MD. RASHIDUZZAMAN MIM (16205002)
- MD. RUYEL MIAH (16205003)
U N I V E R S I T Y O F A S I A P A C I F I C
D E P T . O F C I V I L E N G I N E E R I N G
D E TA I L S O F C O N S T R U C T I O N
C E 2 0 0

2. O U T L I N E S
• DEFINITION
• FUNCTION
• SIGNIFICANCE OF SLAB
• CLASSIFICATION
• CONSTRUCTION OF SLAB
• PROBLEM IN SLAB, ITS CAUSES
AND PREVENTION
• SECTIONAL VIEW OF SLAB.

3. D E F I N I T I O N :
A large, thick, flat piece of stone or concrete, typically square
or rectangular in shape. It also serve as a load bearing device
on each floor of homes.

4. F U N C T I O N :
• Provide a flat surface
• To support load
• Sound, heat and fire insulator
• Act as a divider (privacy) for the occupants
• Upper slab became the ceiling for the storey below
• Space between slab and ceiling can be used to place building facilities

5. S I G N I F I C A N C E O F S L A B :
• COMPRESSIVE STRENGTH- In slab concrete takes all the
compressive strength and load (dead load, live load).
• TENSILE STRENGTH- Basically the reinforcement takes all the
tensile strength what is act on slab.

6. C L A S S I F I C AT I O N :
• GROUND FLOOR-
- SOLID FLLOR
- SUSPENDED GROUND FLOOR
• UPPER FLOOR-
- TIMBER FLOOR
- PRECAST FLOOR
- REINFORCED CONCRETE FLOOR

7. C O N S T R U C T I O N O F S L A B :
• MATERIAL:
-SAND, CEMENT, REINFORCEMENT.
• MACHINE:
-MIXING MACHINE, CUTTER, VIBRATOR.
• FORMWORK:
-STEEL, WOODEN.
• PROPS, BRACING.

8. C O N S T R U C T I O N O F S L A B :
• REINFORCEMENT OF SLAB:
-Slab reinforcement includes straight bar, cranked bar.
-Extra tops near the support.

9. C O N S T R U C T I O N O F S L A B :
• CLEAR COVER:
-Mainly 1.5” clear cover is maintained.
-CC blocks are used.

10. CO N S T R U C T I O N O F S L A B :
• CASTING AND COMPACTION:
-Compaction will done on vibrator.

11. C O N S T R U C T I O N O F S L A B :
• CURING AND REMOVAL OF FORMWORK:
-Curing is done for 21 days or 28 days.
-After finishing curing the formwork will be removed.

12. S L A B P R O B L E M S , C A U S E S A N D P R E V E N T I O N :
• FOUNDATION CRACKS-
CAUSE: Cracks may be cause due to present of sulphate in
concrete.
PREVENTION: Use of sulphate resisting cement, use of high
alumina cement, use of pozzolana, properties of concrete.
• SETTLING:
CAUSE: Settling is most remedied by the installation of helical
piers or piles. They support the foundation and keep it from
settling further.
PEREVENTION: Investigates soil condition.

13. S L A B P R O B L E M S , C A U S E S A N D P R E V E N T I O N :
• SHIFTING PIERS.
CAUSE: Occasionally, piers can shift and can cause
problems for your slab foundation.
PREVENTION: The best remedy to fix a shifting
foundation is to install new piers.
• IMPROPER DESIGN:
CAUSE: The final concrete slab foundation
problem is a poorly designed foundation.
PREVENTION: Using the right type of foundation
in the right soil type, or even physically making
the foundation properly.

14. S L A B P R O B L E M S , C A U S E S A N D P R E V E N T I O N :
• BLEEDING:
CAUSE: It may be cause due to use of
higher water cement ratio and higher fine
particles.
PREVENTION: Maintaining proper
water cent ratio, and proper coarse and
fine particles ratio.
• LAITANCE:
CAUSE: Due to higher fineness cement
use.
PREVENTION: It may be prevent by
using blended cement.

15. S L A B P R O B L E M S , C A U S E S A N D P R E V E N T I O N :
• VOLUME EXPANSION:
CAUSE: It may be caused by present of sulphar in concrete.
PREVENTION: Use of sulphar resisting cement.
• PERMEABILITY:
CAUSE: It may be caused by laking of good grading in aggregate and
proper compaction.
PREVENTION: It may prevent by maintain grade of aggregate and
compaction system.

16. S L A B P R O B L E M S , C A U S E S A N D P R E V E N T I O N :
• FALLING DOWN OF PLASTER.
• UNEQUAL DISTRIBUTION LOAD.

17. S E C T I O N A L V I E W O F S L A B :