European technical approval
ETA-09/0295
English translation prepared by DIBt
Page 9 of 32 | 9 May
2013
Z38892.13
8.06.01-155/13
4.3.8
Connection
joint
The transfer of shear forces between new concrete and existing structure shall be designed
according to EN
1992-1-1. The joints for concreting must be roughened to at least such an
extent that aggregate protrude.
In case of a carbonated surface of the existing concrete structure the carbonated layer shall be
removed in the area of the post-installed rebar connection with a diameter of d
s
+ 60 mm prior to
the installation of the new rebar.
The depth of concrete to be removed shall correspond to at least the minimum concrete cover
for the respective environmental conditions in accordance with EN 1992-1-1.
The foregoing may be neglected if building components are new and not carbonated and if
building components are in dry conditions.
4.4
Installation
The fitness for use of the post-installed rebar connection can only be assumed if the rebar
respectively the Hilti tension anchor HZA-R is installed as follows:
-
the installation of post-installed rebar respectively Hilti tension anchor HZA-R shall be done
only by suitable trained installer and under supervision on site; the conditions under which an
installer may be considered as suitable trained and the conditions for supervision on site are
up to the Member States in which the installation is done,
-
use of the injection system only as supplied by the manufacturer without exchanging the
components of the Injection system,
-
installation in accordance with the manufacturer’s specifications and drawings using the tools
indicated in the technical documentation of this European technical approval,
-
checks before rebar installation to ensure that the strength class of the concrete in which the
post-installed rebar connection is to be placed is in the range given and is not lower than that
of the concrete to which the characteristic loads apply,
-
check of concrete being well compacted, e.g. without significant voids,
-
check the position of the existing rebars (if the position of existing rebars is not known, it shall
be determined using a rebar detector suitable for this purpose as well as on the basis of the
construction documentation and then marked on the building component for the overlap
joint),
-
keeping the anchorage depth as specified in the design drawings,
-
keeping of concrete cover and spacing as specified in the design drawings,
-
positioning of the drill holes without damaging the reinforcement,
-
in case of aborted drill hole the drill hole shall be filled with mortar,
-
the post-installed rebar connection must not be installed in flooded holes,
-
the drilling and cleaning of the hole and the installation shall be performed only with the
equipment specified by the manufacturer according to the manufacturer's installation
instructions (see Annexes 10-18), it shall be ensured that this equipment is available on site
and it is used,
-
during curing of the injection mortar the temperature of the building component must not be
less than +5 °C and no more than +40 °C; observing the curing time given in Annex 18.
