Civil Engineering Reference
In-Depth Information
7. Preserving
or restoring
passivity
7.1 Increasing cover with additional mortar or
concrete
EN 1504-3
7.2 Replacing contaminated or carbonated
concrete
EN 1504-3
7.3 Electrochemical realkalisation of
carbonated concrete
CEN/TS 14038-1
7.4 Realkalisation of carbonated concrete by
diffusion
Proprietary
7.5 Electrochemical chloride extraction
CEN/TS 14038-2
(draft)
8. Increasing
resistivity
8.1 Hydrophobic impregnation
EN 1504-2
8.2 Impregnation
EN 1504-2
8.3 Coating
EN 1504-2
9. Cathodic
control
9.1 Limiting oxygen content (at the cathode)
by saturation or surface coating
Proprietary
10. Cathodic
protection
10.1 Applying an electrical potential
EN12696-1
11. Control of
anodic areas
11.1 Active coating of the reinforcement
EN 1504-7
11.2 Barrier coating of the reinforcement
EN 1504-7
11.3 Applying corrosion inhibitors in or to the
concrete
EOTA
can be found for products and systems for any given method. For example,
the requirements for Method 3.1, hand-applied mortar, can be found in
EN 1504-3 (i.e. Part 3). In EN 1504-9, the third column is left blank for
methods that are outside EN 1504, but Table 11.5 has been completed here
with three additional categories: other relevant
European Standards;
EOTA-
certified techniques that are outside EN 1504; and Proprietary systems
offered by one or more companies with no independent performance
certification at this time.
The following examples give more information on the application of
some of these alternative methods:
•
1.4 Surface bandaging of cracks
- waterproofing systems for cracked
concrete comprising glued rubber sheeting bonded onto concrete
surfaces are currently outside EN 1504, but are covered by EOTA
certification.
•
1.7 Erecting external panels
- this can be achieved by designing a new
precast or in-situ concrete wall and the design of such a wall is covered
by an existing Eurocode Design Standard EN 1992-1-1.
•
2.5 Electrochemical treatment
- electrochemical drying of concrete
by passing a current through the reinforcement, similar in principle
