Relevant to post fixed connections on civil infrastructure. Can be both rebar and anchors.
Hi Martin,
Thanks for your query.
Civil infrastructure is of course commonly designed for a lifetime of 100-years but as you may already be aware the typical anchor approvals (product ETA documents) are based on an assumed working life of 50 years.
With mechanical anchors, the design life is primarily governed by the corrosion resistance of the anchor material in application environment – so determination of long-term suitability can be completed using normal means. Consideration of corrosion resistance of the steel element is of course also relevant for chemical anchors, but with chemical anchors we also need to take into account the performance of the bond over the extended period i.e. between 50 and 100-years.
As part of a suite of comprehensive approvals and assessments addressing applications not covered by standard testing to gain an ETA, Hilti have new design data for HIT-RE 500 V3 with both threaded anchor rods and rebar for applications requiring 100-year design life in both cracked and uncracked concrete.
Please contact a Hilti Engineer for further information and to receive a copy of this document.
Kind regards,
Tony