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Subject Syllabus

CE803 (C) - Retrofitting and Rehabilitation of Structures

CIVIL · Semester 8

Course Modules

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Introduction and Definition for Repair, Retrofitting, Strengthening and rehabilitation Physical and Chemical Causes of deterioration of concrete structures Evaluation of structural damages to the concrete structural elements due to earthquake Durability of concrete: Factors affecting durability of concrete, Corrosion of reinforcements in concrete Carbonation, Chloride ingress, Alkali-silica reaction, Freeze-thaw effects, Chemical attack, Abrasion, erosion and cavitation, Weathering and efflorescence

Purpose of assessment, Rapid assessment, Investigation of damage Evaluation of surface and structural cracks, Damage assessment procedure Destructive, non-destructive and semi destructive testing systems

Effects due to climate, temperature, chemicals, wear and erosion Design and construction errors, corrosion mechanism Effects of cover thickness and cracking, methods of corrosion protection Corrosion inhibitors, corrosion resistant steels, coatings, and cathodic protection

Definitions: Maintenance, Facts of Maintenance and importance of Maintenance Need for retrofitting, retrofitting of structural members i.e., column and beams by Jacketing technique Externally bonding (ERB) technique, near surface mounted (NSM) technique, External post-tensioning Section enlargement and guidelines for seismic rehabilitation of existing building

Artificial fibre reinforced polymer like CFRP, GFRP, AFRP and natural fiber like Sisal and Jute Adhesive like, Epoxy Resin, Special concretes and mortars, concrete chemicals, special elements for accelerated strength gain Techniques for Repair: Rust eliminators and polymers coating for rebar during repair Foamed concrete, mortar and dry pack, vacuum concrete, Gunite and Shot Crete Epoxy injection, Mortar repair for cracks, shoring and underpinning