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Strengthening and Retrofitting

Why Strengthening and Retrofitting is required?

  • To overcome low member strength
  • To counter the deflection & hence cracking
  • To resist earthquake forces hence to save lives
  • To overcome deficiencies in structural member due to
    • Chemical disruption
    • Weathering wear
    • Fire exposure
    • Natural Disaster
    • Water seepage
    • Marine exposure/chloride & sulphate exposure
    • Additional service load
    • Poor design & under design
    • Poor construction methods & practice
    • Poor materials

We follow widely accepted engineered demolition techniques while executing strengthening works


  • Fibers have several advantages including high stiffness, high tensile strength, low weight, high chemical resistance, high temperature tolerance and low thermal expansion. Fibre and a bonding material which forms the matrix, when bonded to the exterior of an RC element, it can add significant strength/rigidity without adding mass and weight.
  • Increasing loads/force carrying capacity and making structures resistant to collapse & service loads. A technique where carbon fiber fabric bonded to the exterior of structural concrete members, proves to be a valuable tool. The materials and techniques of this approach have been perfected and adapted for use in structural rehabilitation/retrofitting projects and for refurbishment of structures to resist the gravity loads or dynamic loads
  • Recent developments on using BASALT FIBER etc is very promising for construction industry
  • Recent developments on cementitious matrix has brought lot of hopes in protecting retrofitted structures form FIRE


  • Assembly of fibers in multiple layers using resin matrix system provides required in-plane stiffness, bending stiffness, strength
  • Carbon laminate system is a promising strengthening strategy to increase the capacity of the structures by installing CFRP laminate either strips into pre-cut slits opened in the concrete cover or bonded on its width over the cover concrete of RC elements It has been successfully used to increase the flexural and shear resistance of RC elements of structures


  • Long established & proven techniques widely used for the strengthening & retrofitting by increasing the section of the existing member.
  • Higher deficiencies in capacity of structures can overcome using this technique
  • Depending on the type of jacketing used, an increase in strength and stiffness, ductility or a combination of them can be obtained.