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

CH!\‘.?l TECZSIC'.AL ADVISORY T 5040.30
November 30, 1333
Attachments
(4)
(5)
(6)
The dimensions of the final sawing should be dependent upon
the sealant type and the anticipated longitudinal slab
movement.
For longitudinal joints, a minimum initial sawcut depth of
O/3 is reconmtended to ensure cracking at the joint. The
maximum sawcut depth should be such that the tiebars are not
damaged. A final sawing that provides a 3/8-inch wide by
l-inch deep sealant reservoir should be sufficient.
When a lengthy period is anticipated between the initial
sawing of the joint and the final sawing and sealing,
consideration should be given to filling the joint with a
temporary filler. This filler material should keep
incompressibles out of the joint and reduce the potential
for spalling.
The use of plastic inserts is not reconmtended. Although a
few States have had success with these inserts, most States
no longer allow their use. Improper placement of plastic
inserts has been Identified as a cause of random
longitudinal cracking [2]. It is also very difficult to
seal the joint formed by these inserts.
-
/,
+ .-.;.
7'. c/j:.- : 44.a.a
,,/~An~h~n~ 6. Kane
. .
, /.*
Associate Administrator
Development
for Program
3.1.14