This is the most common class of applications for post-installed rebars and includes the connection of new components to an existing structure.
According to structural concrete building codes, the bond strength of cast-in bars is limited, even where depth of concrete cover is considerable.
And so, in some areas, such as walls where anchorage depth is often limited, welded transverse reinforcement or hooks are used to compensate for the reduction in available anchorage length.
Our research, along with our partners’ research, has shown that the bond strength of bars anchored with Hilti adhesive mortars is higher than that of cast-in place bars, provided there is adequate concrete cover.
The Hilti HIT Rebar Design Method takes advantages of this increased bond strength in order to achieve anchorage length reductions of up to 70%, when adequate concrete cover is applied, compared to the figures given in building codes.