Principles should be followed in the treatment of concrete crack

Identify the nature of cracks; Ensure structural safety; Ensure durability;Prevent unnecessary damage; Improve the conditions of structural use, eliminate the factors causing cracks; Meet the design requirements and comply with the relevant provisions of the standard specification.

treatment of concrete cracks

The following principles should be followed in the treatment of concrete cracks

  • Find out the situation: structure actual condition, the key character of cracks and development situation of cracks.

  • Identify the nature of cracks: cracks that do not deteriorate in structure, then be treated after being clearly defined.

  • Clear purpose: seal or reinforcement.

  • Ensure structural safety: take urgent measures when necessary to prevent vicious collapse accidents.

  • Meet the use requirements: stiffness, size, space and tightness, leakage prevention, cleanliness, aesthetics.

  • Ensure durability: prevent steel corrosion and repair material durability.

  • Determine the appropriate processing time: deal with as stable as possible.

  • Prevent unnecessary damage: avoid artificial expansion and then repair.

  • Improve the conditions of structural use, eliminate the factors causing cracks: ensure that cracks do not develop.

  • The feasibility of the method is reliable, convenient, safe, economical and reasonable.

  • Meet the design requirements and comply with the relevant provisions of the standard specification.


Bonded fiber reinfroced polymer(FRP) compsoite wrap

Crack repair method

  • Compacting leveling method

Application: early shrinkage crack and shrinkage crack before hardening of concrete.


  • Epoxy adhesive paste

Application: when the concrete is hardened, the width of the surface is <0.3mm, the depth is not large, and the cracks are more numerous.

Treatment points: first clean the surface that needs to be treated, remove oil stains and dirt, and use acetone to scrub, and then brush epoxy mortar repeatedly after drying, once every 3 to 5min, and the thickness of the coating is about 1mm.

Treatment effect: the penetration depth can reach 16 ~ 84mm, which can effectively prevent air and water from penetrating.



  • Surface suture



  • Strengthening and retrofitting measures


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HM-20 Unidirectional Carbon Fiber Wrap

High strength, unidirectional carbon fiber wrap pre-saturated to form a carbon fiber reinforced polymer (CFRP) wrap used to strengthen structural concrete elements.

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HM-9 Crack Sealing Adhesive

High strength crack sealing repairing adhesive for the fracture surface of concrete crack

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HM-120L Crack Injection Resin

Very strong penetration and low viscosity epoxy crack injection adhesive for repairing concrete crack

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