Handbook for Bridge Inspections - TSP2

Procedures
The compress ive strength of stone is ascertained by removing
stone cores and subjecting these to pressure testi ng. Only stone
which is representative and free from cracks and scratches should
be used in core sampling. This method can also be em ployed to
determine the modulus of elasticity of the stone.
These tests should be carried out by suitably qualified people
using specialist equipment and can be used during Special
inspections.
Equ ipme nt
'" Core drilling equipment
'" Pressure testing machine
7.7 Adequate Checking of the
Surface Treatment
What fo llows is a description of the tests which can be carried out
when inspecting the surface coating of concrete, steel or timber.
These tests should primari ly used during Acceptance Inspections
in the absence of any records indi cating they have al ready been
conducted. Moreover, they should be executed during Special
Inspections.
A licensed Inspector should preferably be employed for special
checks of the surface coating of steel, especially when extensive
maintenance work is under consideration.
Purpose
Procedures
Equipment
7.7.1 Thickness of Surface Coating -Concrete
To check that the thickness of the surface coating of the concrete is
as prev iously described.
The test can be conducted on already cut out sections whose thickness
can be directly measured by use of, for example, an instrument
ror measuring the width of cracks or a magni fying glass.
Alternatively for concrete a sli ver of tile surface coating can be
tested for thickness.
'" Core drill ing equipment
'" Measuring Gauge or a Magnify ing Glass
Purpose
7.7.2 Adhesive Bonding between Surface
Coating and Concrete
To measure the surface coating's bonding to the concrete using a
stripping instrument.
Reference is made to the Norwegian Public Roads Administration
Manual No. 0 15: 'On Site Testing' ~ Method No. 15.541 .