Maintenance and Rehabilitation of Structures Handwritten Premium Lecture Notes, Prepared by Buvana. Syllabus is Based on Anna University , Post Graduate M.E. Structural Engineering R2013 Regulations
CONTENT:
UNIT-1
Introduction
UNIT-2
BUILDING CRACKS
UNIT-3
MOISTURE PENETRATION
UNIT-4
DISTRESS AND REMEDIES
UNIT-5
STRENTHENING OF EXISTING STRUCTURE
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UNIT-1
Introduction
Concrete structure damages, defects and its prevention
Concrete structure damages and deflects
Concrete damage due to steel reinforcement corrosion
Damage by carbonation
Inspection of concrete structure
Reason for conducting inspection
Preliminary inspection
Structural appresal
UNIT-2
BUILDING CRACKS
Causes
Permeability of concrete
Remedial measures
Thermal movements
Creep
Corrosion of reinforcement
Moisture movement
Poor construction practices
Poor structural design and specification
Poor maintenance
Movement due to chemical reaction
Indiscrimination addition and alternation
Measures for prevention of cracks
Choice of materials
Masonary units
Fine aggregate
Coarse aggregate
Cement
Calcium chloride
Gypsum
Design of building
Construction practices
Environment
Thermal cracking
Occurance of thermal cracking
Mass concrete
Other structure
Minimize thermal cracking
Vegetation and tress
Roots damaging buildings
Possible solution
Movements due to chemical reaction
Sulphate attack
Carbonation
Corrosion of reinforcement in concrete and brick work
Alkali aggregate reaction
Foundation movement and settlement of soil
Movement joints
Concrete work
RCC frame work
Epoxy injection
Preparation of the crack for injection
Injection tips
UNIT-3
MOISTURE PENETRATION
Dampness in buildings
3 primary causes of dampness in building
Poor quality of construction materials
Bad design
Faulty construction or bad workmanship
Major sources of dampness
Defects caused by dampness
Moisture movement
DPC
Methods of providing
Roof leakage
Roofing with traditional madras roofing techniques
Dampness in solid walls
UNIT-4
DISTRESS AND REMEDIES
Brittle fracture
Corrosion
Deterioration of structure and their causes
Welding defects
Types and causes of deterioration
Repair procedure
Prevention of corrosion
Atmosphere pollution
Corrosion prevention and control
Mechanism of corrosion
Lamellar tearing in welded steel fabrication
UNIT-5
STRENTHENING OF EXISTING STRUCTURE
General principle
Method 1
Method 2
Method 3
Method 4
Method 5
Method 6
Method 7
Super structure
Elements to be retrofitted
Retrofit of bridge decks and girders
Deck to girder connection
Diaphragh strenthenig details
Bonded overlay
Thickness design
Construction
Jacketing and collars for column beam strengthing
Load capacity
Methodology
Result and discussion
General repair
Concrete cracking
Cathode protection
Galvanic cathodic system
Underpinning
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