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Methods of Concrete Column Repair for Damages and Cracks

Repair of Concrete Columns for Cracks and Damages Before starting the repair of a concrete column, the axial dead load, axial live load, horizontal load and its associated moments must be known. Repairs to concrete columns can be divided into two categories. ...

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CHLORIDE EXTRACTION FROM REINFORCING STEEL IN CONCRETE

Chloride Extraction from Reinforcing Steel Chloride extraction is another method of preventing future corrosion of steel. Electrochemical chloride extraction (ECE) is a treatment process where chloride ions are removed from chloride-contaminated concrete through ion migration. Unlike a cathodic protection system, there ...

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MATERIALS FOR REPAIR OF CONCRETE STRUCTURES

The range of materials for repair of concrete structures to be effectively durable is fairly limited. The materials most widely used are concrete and mortar, which are made as far as practicable with the same type of cement and aggregates ...

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CONSTRUCTION DEFECTS IN CONCRETE STRUCTURES

Defects in concrete structures can be due to poor construction practices i.e. poor construction quality control at site or due to poor structural design and detailing. But, after construction at site, the common types of defects in concrete structures are ...

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RETROFITTING OF RCC STRUCTURAL MEMBERS

Retrofitting of RCC structural members is necessary to prevent further distress in concrete. The retrofitting of RCC members should start with investigation and diagnosis of cracks and then by applying suitable retrofitting measures. Following are the steps involved in this ...

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Maintenance of Concrete Structures for Durability of RCC Members

Maintenance of Concrete Structures for Durability of RCC Members Modern concrete is a very durable construction material and, if properly proportioned and placed, will give very long service under normal conditions. Many concrete structures, however, were constructed using early concrete technology, and ...

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REPAIRING OF PLASTER IN WALLS

Repairing of plaster is needed from time to time as the building ages. The plaster repair work includes cutting the patch and preparing the wall surface. Procedures involved in repair of plaster are: 1. Setting up Scaffolding: Scaffolding if required for the proper ...

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SEGREGATION OF CONCRETE – CAUSES & PREVENTION

Segregation of concrete is separation of ingredients of concrete from each other. In good concrete all concrete aggregates are evenly coated with sand and cement paste and forms a homogeneous mass. During handling, transporting and placing, due to jerks and vibrations ...

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EPOXY COATING OF STEEL REINFORCEMENT

Epoxy Coating of Steel Reinforcement It is important to use epoxy coated rebar to protect steel from corrosion. Using certain types of epoxies yielded positive results, especially in steel exposed to seawater while evaluating the use of epoxy to coat steel ...

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POST TENSIONING IN REHABILITATION OF STRUCTURES

POST TENSIONING IN REHABILITATION OF STRUCTURES Post tensioning has become very popular these days sensing the advantages it provides. Even small structures of G+2 are using post tensioning these days. The application of post tensioning has increased and it is well being ...

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