An Evaluation of MoDOT's Current Coatings Programs Final ... - TSP2

Program: New Construction System: Inorganic Zn,
System G or H
Deficiency / Issue Recommendation Impact Implementation Cost Benefit
Consistent enforcement of Mandatory Pre-bid meetings 1
specifications – Office to
office and District to District.
Mandatory annual coating 1
standards meetings
Require submittal of pre-job 1
samples to establish
standards
Revise or create better
specifications
New specs on certification 2 Require contractor to submit
names of certified personnel
who will be performing the
work prior to starting work.
Stripe Coats
Required in SSPC-PA1 and
PA1 is defined in current
specs. Require enforcement
and possibly use of different
tinting to verify
1 Add specific language to
specifications about stripe
coating referring to PA1.
Include option of tinting or
prestriping.
Minimal cost for material
and additional labor.
New Materials Two-coat systems 4 Industry working on these
Polysiloxanes 3 In the works.
Crack indicating coatings 4
Galvanizing – in high
moisture areas
Metallizing – in high moisture
areas
4 Must be analyzed in the
design phase
4 Must be analyzed in the
design phase
Expensive and limited to
size of component that can
be dipped
Very expensive
Optically Active Pigmentation 5
70