Chemicals commonly used in retrofitting civil construction work

 

            Here’s a list of chemicals commonly used in retrofitting civil construction work

A. Epoxy Resins

  1. Use: Applied to surfaces for bonding old and new concrete, crack filling, or bonding steel plates for structural strengthening.
  2. Place of Use: Surface treatment for cracks and bonding layers.
  3. Example Products: Sikadur 32 (Sika), Nitobond EP (Fosroc)

B. Polyurethane (PU) Coatings and Grouts

  1. Use: For crack injection, waterproofing, and sealing porous surfaces.
  2. Place of Use: Applied as a coating or grout to seal cracks and prevent water ingress.
  3. Example Products: Sika Injection-101 RC, BASF MasterSeal

C. Silane/Siloxane Water Repellents

  1. Use: Surface treatments that create a water-repelling layer on concrete, masonry, or stone.
  2. Place of Use: Applied to surfaces exposed to water to prevent water penetration.
  3. Example Products: BASF MasterProtect H 1100

D. Acrylic or Cementitious Waterproofing Chemicals

  1. Use: Applied on surfaces to provide a waterproof barrier, often used on roofs, basements, or exterior walls.
  2. Place of Use: Surface coating for waterproofing.
  3. Example Products: Dr. Fixit Newcoat, Fosroc Brushbond

E. Polymer Modified Mortars

  1. Use: Surface repairs or overlay applications to increase the tensile strength and bonding of repair materials to the existing structure.
  2. Place of Use: Applied as a repair mortar for surface treatment in damaged areas.
  3. Example Products: Fosroc Renderoc, Sika MonoTop

F. Corrosion Inhibitors

  1. Use: Applied to steel surfaces or reinforced concrete to protect against corrosion.
  2. Place of Use: Surface treatment to prevent steel corrosion in concrete structures.
  3. Example Products: Cortec MCI-2020, BASF MasterProtect 8000 CI

F. Carbon Fiber Reinforced Polymer (CFRP) with Epoxy Adhesives

  1. Use: Strengthening beams, columns, and slabs by bonding CFRP sheets to the surface.
  2. Place of Use: Applied externally to the structure’s surface to provide additional strength.
  3. Example Products: SikaWrap, MapeWrap

G. Silica Fume

  1. Use: As a surface treatment additive to improve the strength, durability, and water resistance of concrete.
  2. Place of Use: Often mixed into surface layers of concrete or used in repairs.
  3. Example Products: Elkem Microsilica

H. Acrylic Bonding Agents

  1. Use: Surface treatment to enhance bonding between old and new concrete layers.
  2. Place of Use: Applied to the concrete surface before the new layer or repair is applied.
  3. Example Products: Sika Latex, BASF MasterEmaco

I. Microbial-Based Repair Chemicals

  1. Use: Surface treatment for self-healing cracks in concrete using bacteria that produce limestone to seal cracks.
  2. Place of Use: Applied to cracks in concrete to activate self-healing processes.
  3. Example Products: Specialty products under research.

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