chapter 3 rigid pavement - DOT On-Line Publications - Department ...

When sealing a width of two lanes or less, splices should not be
permitted. When sealing more than two lanes, one splice may be
permitted; however, the contractor should closely follow the
manufacturer's recommendations for splicing.
Close inspection of the installation procedure is necessary to
ensure that the seals will perform as intended. The inspector
should verify that the pavement joint is sawed to the proper
width and depth, and that the compression seal is the correct
width prior to commencing sealing. The tolerance for the joint
width should be + l/16-inch. During the installation process,
the inspector should verify that the seal is not being stretched.
This can be done by comparing the distance between two marks on
the surface of the seal measured before and after installation.
The inspector should also visually inspect the compression seal
to ensure that it has not been twisted-or damaged,-and is
adequately recessed.
.
s-y. If properly designed and installed, preformed
compression seals have the potential to provide excellent
performance over an extended period. It is not uncommon to find
compression seals more than 10 years old still performing as well
as newly installed seals. To ensure this type of performance,
both the width of the pavement joint and the pavement temperature
at the time of installation need to be coordinated with the width
of the compression seal. The joint should be designed and
constructed so that the compression seal will function entirely
within the manufacturerls recommended operating range, generally
20 percent to 50 percent compression of the uncompressed seal
width. This may necessitate that seal installation be prohibited
during certain extremes in pavement temperature. Satisfactory
joint sealant performance is dependent upon good construction
procedures and proper inspection.
3.3.6