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The inspection and test plan is a vital part of Quality control and Quality assurance
plan. It occurs in different stages of work implementation as already shown in our
Performance schedule. The test plan procedure is carried out in three stages ofinspection and testing.
1. Surface preparation
2. Coating applications
3. Concrete Repair
1. Surface Preparation:
On Steel Beam Surfaces
During surface preparation, the one length section of steel beam is enclosed
properly with management of proper air circulation system equipment such as
PARP and Respiratory Protective devices. Steel has to be sand blasted according
to SSPC-SP-10 (NACE Standard) or SA 2 (ISO 8501-1). Average surface profile
Rz > 50 m has to be achieved. Ensure that the substrate is free from
containments detrimental to adhesion. The blasting is done by Euro grit,
Aluminum Oxide, Copper slag 1 and 2.The surface is thoroughly inspected to
remove any sharp edges, undercut, rough beads etc. After inspection, the survey
of steel member will carry out to determine thickness with precise measurement
such as calipers and the steel area loss is calculated in percentage at the Initial
and after blasting. Furthermore, the procedure is carried out as specified in
specification for strengthening. After strengthening, again the surface
roughness, splatter of weld is inspected and removed if any.
On Concrete Surfaces
All the Cracks underside of slab will be inspected thoroughly and marked the
repair areas. The temporary propping will be done around the repair areas. The
Loose concrete near the cracks will be removed and concrete will be removed at
least 25mm behind the rusted reinforcement. The rusted bar is blast clean. The
repair area will be enclosed properly with management of proper air circulation
system equipment such as PARP and Respiratory Protective devices. Rusted
Steel has to be sand blasted according to SSPC-SP-10 (NACE Standard) or SA 2 (ISO 8501-1). Average surface profile Rz > 50 m has to be achieved. Ensure that
the substrate is free from containments detrimental to adhesion. The blasting is
done by Euro grit, Aluminum Oxide, Copper slag 1 and 2.The diameter of steel
reinforcement will be measured and the steel area loss is calculated in
percentage at the Initial and after blasting. Furthermore, the procedure is carried
out as specified in specification for strengthening.
2. Coating applications:
The Coating of Steel beam will be done by Sika Guard 62.The working areas shallbe protected from strong winds or rain etc., to prevent adverse conditions for the
materials preparation, application and curing during and after the lining works.
The Climatic conditions such as Ambient and Surface temperature shall be
defined as Substrate temp. > 3K above dew point and measured e.g. by
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thermometer, hygrometer, dew point table. The range of temperature should be
Min. +10C (but at least 3K above dew point) and Max. +35C. In all of the
application condition, the substrate must be at least 3K above dew point. The
mixing and application of this coating along with the applicators information is
attached in the Annexure of this submittal for reference.
3. Concrete repair:
After Completion of strengthening of reinforcement bars, the Coating of steel bar
carry out by Sikaguard 62. The working areas shall be protected from strong
winds or rain etc., to prevent adverse conditions for the materials preparation,
application and curing during and after the lining works.The Climatic conditions
such as Ambient and Surface temperature shall be defined as Substrate temp. >
3K above dew point and measured e.g. by thermometer, hygrometer, dew point
table. The range of temperature should be Min. +10C (but at least 3K above
dew point) and Max. +35C. In all of the application condition, the substratemust be at least 3K above dew point. The mixing and application of this coating
along with the applicators information is attached in the Annexure of this
submittal for reference. After completion of Coatings, a dense concrete repair
mortar, Sika MonoTop 615HB will be applied as mentioned in data sheets of Sika
Monotop 615HB.
The Inspectors CV and inspection procedure check list of Steel beam lining is also
attached in the Annexure-I of this submittal for reference.