Handbook for Bridge Inspections - TSP2
Handbook for Bridge Inspections - TSP2
Handbook for Bridge Inspections - TSP2
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grouting gun pushed all the way to the bottom of the hol e. As the<br />
hol e fill s up the tube is gradually removed.<br />
Holes resulting from Core Drilling or larger Chiselled Cuts<br />
Dust and loose particles should be cleaned out with water after<br />
which any water remaining should be dried up . The mortar to be<br />
used <strong>for</strong> the repair(s) should be mixed to the required consistency<br />
and put in the ho le(s) to 2·3cm below the surface level. Once the<br />
mortar has set the remainder of the hole should be fill ed with mar·<br />
tar flush with the surface. Immediately thereafter a layer of thick<br />
elastic cement-based coating should be applied to the surface.<br />
Mortar used to repair holes resulting from core dri ll ing or larger<br />
chiselled cuts should satisfy the same requirements <strong>for</strong> mortar<br />
used during mechanical repairs.<br />
Purpose<br />
Procedures<br />
7.3. 1 Locating the Rein<strong>for</strong>cement - Measuring<br />
its Cover<br />
To locate the rein<strong>for</strong>cement and measure its cover.<br />
Reference is made to the Nonvegian Public Roads Administrati on<br />
<strong>Handbook</strong> No. 015: "Tests carried out in the Field", Method<br />
No. 15.542.<br />
The description given in the procedural code of how cover is measured<br />
should be used to obtain accurate measurements. However,<br />
these can be simpl ified as follows if the measurements are more in<br />
the nature of a spot test:<br />
In the area where the cover is to be measured locate the load bearing<br />
rein<strong>for</strong>cement and the direction in which it is lyi ng. If possible<br />
the nearest mounting rod should also be located<br />
The cover is to be measured <strong>for</strong> a minimum of three rods in the<br />
outennost layer of the load bearing rein<strong>for</strong>cement.<br />
Measurements are to be taken at a point halfway between intersecting<br />
rods (see Figure 7.3- 1).<br />
x<br />
®<br />
x<br />
x<br />
o x<br />
,<br />
Me8wrernent poinllOl I~d l;JeR ri~ reinloroem ent<br />
Outermost layer<br />
of load bearing<br />
rein<strong>for</strong>(lement<br />
>,·-1 . Intersecting Rods: ,....,. ,<br />
• I<br />
Itw! nf!'xt outermo!ll<br />
layer of load bc.aIing ~.<br />
Mounting fl od<br />
,<br />
..,<br />
. . .<br />
" . ,~~ .<br />
, '<br />
,... ......<br />
......<br />
.,<br />
' ~,'\ ~ ....... ,<br />
. ,<br />
. . ,<br />
" •• II' .\, •<br />
",.<br />
MeR!2IurerTlPrnt point tm mountin9 Rnds Figure 7. 3-1 Defil1ition a/takil1g a Cover MC(Jsuremelll by Spot Testing<br />
The cover <strong>for</strong> possibl e new mounting rods has to be measured at<br />
least one point.
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