Precast Concrete Repairs

In the past few years the pre-cast industry has grown tremendously with the new and challenging requirements from most of the construction industry. The precast concrete elements with defects need to be repaired properly.

Repairing Minor Defects of Precast Concrete:

Defects not impairing the functional use or expected life of a Pre-cast concrete product shall be considered minor defects.

Minor defects may be repaired by any method that does not impair the product.

When honeycombed areas are to be repaired, all loose material shall be removed and the areas cut back into essentially horizontal or vertical planes to a depth at which coarse aggregate particles break under chipping rather than merely being dislodged.

Repairing Major Defects Precast Concrete:

Defects in Pre-cast concrete products that impair the functional use or the expected life of products shall be considered major defects

Repairs should be made as soon as feasible after the defect is noted so that differential shrinkage between the original concrete and the repair concrete is minimized. Repair materials used in repairs of major defects should be essentially the same as the original concrete.

The repair material should become an integral part of the product with no delaminations or cracks.

SIKA Products for Precast Concrete Repairs

PRODUCT NAME
DESCRIPTION
Sikagard 75 Epocem
Superfine epoxy cement sealing mortar, a three component modified cementitious mortar
Sika Refit 2000
A one component polymer modified cementitious based mortar containing silica fume used for cosmetic surface repair & fair coating
Sika Monotop 615 HB
A one component thixotropic, high build, polymer modified mortar containing silica fume, used as repair mortar
Sika Monotop 610
A one component cementitious, polymer modified mortar containing silica fume and corrosion inhibitors, used as bonding slurry and reinforcement* corrosion protection
Sika Monotop R
A one component thixotropic, polymer modified fiber reinforced cementitious mortar used as repair mortar
Sikadur 732
2-component bonding agent, based on selected epoxy resins, for bonding of new to old concrete
Sikadur 731
Thixotropic 2-component adhesive and repair mortar based on combination of epoxy resins and specially selected high strength fillers for concrete repairs
Sikagrout 212/214-11
Non-shrink, self levelling, pre-mixed cementitious grouting mortar