re-plate - Prestressing reinforced concrete
re-plate is a prestressing steel made of memory steel in form of a strip. The product is an efficient and easy-to-install reinforcement measure, especially for strengthening of buildings. The material is pre-strained by re-fer in the plant up to a permanent deformation, pre-punched at both ends and delivered to the construction site. The strip is then mechanically anchored at both ends in the concrete base using Hilti direct fastening. To activate re-plate, and hence prestress it, the memory steel is heated to a temperature between 100 and 220°C (depending on the required prestress level) by an infrared radiant heater of re-fer. re-plate acts as a prestressed, external tendon without bond.
re-plate:
| Application |
Increase of load capacity
- in the event of live or traffic load increase
- for conversion of buildings
- for changes to the static load-carrying system
- for damaged structural parts
Increase of serviceability
- by reduction of deflections
- by closing or reducing crack widths
Seismic strengthening
- thanks to a large ductility
| Advantage |
Prestressing of existing reinforced concrete beams and plates
- high tensile strength and ductility
- very good corrosion resistance (CRC 1)
- easy handling, fast application
- simple and efficient prestressing
- low overall height
- easy to transport
- strip crossings possible
| Documentation |
Application on reinforced concrete
1 Provisionally fix re-plate with T-supports and pre-drill concrete substrate 2 Mechanical end anchoring with Hilti powder actuated tool and system-tested stainless bolts (X-CR 48 P8 S15) 3 Step-wise heating with re-fer infrared radiant heater 4 Temperature control of re-plate with sensor / create protocol 5 re-plate completely applied and pre-stressed
