It is very useful for technical seminar

1. CAUSES, REPAIR &
PREVENTION OF BUILDING
CRACKS
BY:-
NAME:- ABHIPSA DAS
REGD.NO:- 1001216001
BRANCH:- CIVIL ENGG.
SEMESTER:- 8TH

2. CONTENTS
 Causes of building cracks
 Types of cracks in walls
 Types of cracks in R.C.C framed structures
 Repair of cracks
 How to prevent cracks in buildings
 General measures for protection of cracks

3. CAUSES OF BUILDING CRACKS
 Chemical reaction in construction materials.
 Climatic conditions of the nature.
 Foundation movement and setting of building.
 Environmental stresses.
 Bad quality materials.
 Wrong method of construction.

11. Vertical Cracks at Junctions of wall
Causes:-
Improper bonding of cross walls by not leaving proper keys
in the main.
Remedies:-
Both walls must be properly bonded by proper toothing

12. Causes:-
R.C.C beams are not free to deflect
Remedies:-
Gap should be left between top of panel wall and can be filled
with weak mortar

15. REPAIR OF CRACKS
1. Repair of cracks giving hollow sounds
- Remove plaster applying proper cut.
- Prepare the surface properly.
- Apply fresh cement mortar & finish the surface.
2. Repair cracks if it is solid without hollow sound
- clean cracked portion of all loose materials & fill
crack seal sealants in cracked portion. Finally finish
the surface according to adjoining area.

17. HOW TO PREVENT CRACKS IN
BUILDINGS
1. Draining arrangement should be made around the
building to minimize water entry in the foundation.
2. Avoid construction of wall on filled up soil.
3. Avoid trees grow too close to building and
compound walls.

18. General Measures for crack
protection of cracks
Selection of materials.
Specification for mortar & concrete.
Good construction particles.
Weather effects.

19. ANY QUERYYYYYYY?????????

20. THANK YOU