re-plate method for concrete structures

«for statically loaded elements»

re-plate «memory®-steel» is used for retrofitting of structures «for statically and in exceptional cases non statically loaded elements». re-plate is anchored on both sides and functions as an external, unbonded tension strip. re-plate is elongated in the factory and supplied pre-punched at the ends ready to use on-site. The mechanical end anchorage is composed of a Hilti direct fastening system. For activation of the prestressing, the plate is heated using a gas burner or infrared heater.

Usage

Flexural strengthening for positive/negative bending moments

  • changes in loads/operation
  • changes in the load-bearing statical system (Removal of columns/supports, new openings in slabs)

Improvement of serviceability limit state

  • by reduction of deflections
  • reduction of crack width
  • by decreasing the stress level of internal reinforcement (fatigue loads)

Prestressing of coupling joints

  • for seismic strengthening
  • for constructive applications

Strengthening against punching shear

Often appropriate

Combination of re-plate and Sika® CarboDur®:

re-plate

  • Against deflection and cracks in the deck slab and the wall element above
  • To relieve load on the existing internal reinforcement
  • To cover the loads at serviceability state and under fire

Sika® CarboDur® CFRP-laminates

  • To cover the remaining failure load requirement

Tested Sika products

Fire protection:

  • SikaCem® Pyrocoat sprayed fire protection mortar
  • SikaCem® Pyrocoat Base Sprayed basecoat for the Pyrocoat fire protection mortar

Corrosion protection:

  • SikaCor® EG-1 Corrosion protection coating: epoxy-based intermediate coating containing MiO
  • Sikaflex® PRO-3 PU joint sealant for bilateral grouting of re-plate

memory®-steel has been tested in systems with Sika fire and corrosion protection products. re-fer gives no guarantee if other mortars and products are used in combination with memory®-steel.

Application video

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