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 Carbon fiber reinforced polymer (CFRP) is one of the composite materials which is used in both repairing and strengthening of reinforced concrete structures. 

 CFRP used to improve the structural capacity of the existing structural element. Carbon fiber reinforced polymer (CFRP) used to strengthen structural elements. 

 This is mainly due to tensile strength carried by CFRP, which falls between 1500 and 3500 MPa, whereas its metallic counterparts such as aluminum and steel only possess tensile strength of 450–600 MPa and 750–1500 MPa, respectively. 

 CFRP laminates are new carbon-based composite materials that attach externally to concrete beams. These high strength materials improve the bending behavior of beams. 

 Carbon fiber reinforced polymer (CFRP) materials possess good rigidity, high strength, low density, corrosion resistance, vibration resistance, high ultimate strain, high fatigue resistance & low thermal conductivity. They are bad conductors of electricity and are not-magnetic. 

 Jacketing is the process of strengthening weak RCC columns which have deteriorated over some time due to adverse atmospheric conditions or due to poor maintenance of the structure. Other reasons during the construction phase include design errors, deficient concrete production, and bad execution process. 

 Jacketing has been considered one of the important methods for strengthening and repairing RC beams. Jacketing of RC beams is done by enlarging the existing cross-section with a new layer of concrete that is reinforced with both longitudinal and transverse reinforcement. 

 There are three major techniques for strengthening reinforced concrete columns which are discussed below:

1. Reinforced Concrete Jacketing. It is one of the techniques used to improve or restore the capacity of reinforced concrete columns. ...
2. Steel Jacketing. ...
3. FRP Confining or Jacketing.

 Steel jacketing refers to encasing the section with steel plates and filling the gap with non-shrink grout. It is a very effective method to remedy the deficiencies such as inadequate shear strength and inadequate splices of longitudinal bars at critical locations 

 Steel Jacketing is a technique where the retrofit is done with steel to structural elements. The principle behind this technique is that the steel jacket acts as a passive confined reinforcement. It has been widely used as a strengthening technique to enhance the shear capacity and ductility of beams and columns. 

 Steel Jacketing is a technique where the retrofit is done with steel to structural elements. The principle behind this technique is that the steel jacket acts as a passive confined reinforcement. It has been widely used as a strengthening technique to enhance the shear capacity and ductility of beams and columns.

Advantages:

• To increase the flexural strength of the structural member
• Prevents the concrete from dilating, forcing it in lateral compression and increasing its compressive strength
• Increases its effective ultimate compressive strain and its ductility
• Ease for working, reduction of dead load and cross-sectional area.
• The gaps are filled with non-shrink grout.

Where concrete structures have deteriorated due to corrosion and where changes in use and design code do not demand an increase in loading capacity, Efficient repairing of concrete structures can be done by application of POLYMER MODIFIED MORTARS. Structural repairs include Polymer modified mortar. The buildings were initially constructed with concrete mix (1 cement: 1.5 sand: 3 coarse aggregates) with a minimum strength requirement of 20 N/mm2 min., so it was decided that the polymer-modified repair mortar must have a compressive strength of 25 N/mm2. Based on the polymer test reports, the concrete mix used in the construction of these buildings, and the extent of the damage. Polymer Modified Mortar Contractor

 Epoxy mortars and concrete are a blend of epoxy and sand or epoxy and sand plus coarse aggregate. The epoxy system with or without aggregate will provide an impermeable environment and barrier that will protect the reinforcing steel against corrosion. The epoxy mortar/concrete has little or no shrinkage. 

 A three-component, water-washable 100% solids epoxy mortar system for installations where exceptional high-strength and chemical and impact resistance are required. 100% solids epoxy systems' unique formula produces a mortar with greater bond and compressive strengths and improved chemical resistance over conventional cement or emulsion-based setting systems. Use for epoxy mortar patching and overlays on the interior, and horizontal substrates