Handbook for Bridge Inspections - TSP2

ECP-Measurements
For the presentation of potential readings (ECP) the
drawings/sketches should clearly indicate where the measurement
was taken for each element and the location of the earthing point.
EC P readings should be interpreted in accordance with Report
No.94-l 6 issued by the Norwegian Publ ic Roads Administration,
Bridge Di vision: ' Recommendations for the Use of
Electrochemical Equipment for Measuring Potential'. The in terpretati
on should include, amongst other things, the requirement
for three different versions according to co lour setti ng;
Less cri tical colour setting than (b)
Colour choice considered to be the best
More critical colour setting than (b)
Exampl es of the above are shown in Figure 8.5-5.
8.6 Presentation of Damage
Drawings and Sketches
For the reporting of visual inspections drawings/sketches can be
made showing the location and scope of the different kinds of
damage which are in ev idence. This can prove to be an extensive,
time consuming task and should only be undertaken in very special
circumstances.
One exception will be the presence of serious, special sc ratches
and fissures which have to be photographed and/or drawn in on
sketches stating thei r total, the distance from each other and their
length. Both the maximum and average opening of these scratches
and fissures should be indicated.
The symbols which can be empl oyed in draw in gs for each Iype of
damage are presented in Figure 8.6- 1.
w •
Casting j Oint
Delam ination, spalling
Po ro usa r bad qu a Ii ty co n crete
_.
0,2 m m ,2,O mm
Cracking
V isi b Iy co rrod ing rein fa ree ·
ment
Handbook for Bridge Inspections 127