BOSShard expansion of production
Description
Various core drillings had to be made in the heavily reinforced concrete slab. Significant punching shear reinforcements were cut and the tensile reinforcement on the bottom side of the slab was weakened.
re-bar 16 were used for the active reinforcement of the negative bending moment. The concrete slab including the hard-concrete cover was cut and roughened. re-bars with bent ends were then mortared and finally electrically heated. The protruding end hooks can be easily cut off with the cut-off wheel.
The positive bending moment was reinforced with Sika® CarboDur® CFRP-lamellas, prestressed re-plate lamellas, and combinations thereof. Prior to this, adhesive tensile and compressive strength tests were made, as the substrate was recycled concrete.
re-fer products
re-bar 16 with end hooks
re-plate 120/1.5 lamellas
Sika products
Sika® CarboDur® S1014 CFRP-lamellas
Sika MonoTop®-452 N repair mortar
Year
2022
Contractor
Jäggi + Hafter AG, re-fer
Info
Flexural and punching shear strengthening
Engineering consultancy
HTB Ingenieure + Planer AG