Civil Engineering Reference
In-Depth Information
do not require extensive surface preparation and installation time may be
less than for other systems.
Installation/application
After assessment of the condition of the existing structure and design by
a competent professional, installation of the NSM FRP strengthening is
performed according to the following general guide:
•
Cut groove - Using a diamond blade saw or grinder, a groove 1.5 times
the bar diameter (in the case of a rectangular FRP shape, 1.5 times the
depth and 3 times the thickness) is cut as prescribed. The use of two
diamond blades on the saw arbor may be necessary.
Pre-cured shapes for near surface-mounted (NSM) FRP
•
Prepare groove - The groove is masked with masking tape or similar
product to prevent excess adhesive from marring the surface. The
groove is thoroughly cleaned using a vacuum and/or compressed air.
•
Apply adhesive - Structural adhesive gel or grout is filled in the groove.
Care should be taken to avoid entrapped air voids.
•
Place FRP rod/shape into groove - After the adhesive has been applied
into the groove, the rod is placed and pressed into the groove to ensure
proper location of the rod/shape.
•
Finish - After the FRP rod/shape is seated into the groove, the adhesive
is smoothed and any additional adhesive is added. The location is then
cleaned up and the masking removed.
