Be sure approved materials
are used per 409.02
requirements. These include joint
sealant and backer rod.
Check that the following
operations are proceeding properly per 409.03:
·
Saw cut the
intermediate course if the surface course is not placed within 5 days. Saw cut is 1/8 inch wide by 1/4 the depth of
the intermediate course over contractor joints.
At expansion joints the saw cut is 1/2 inch wide by 1/4 the depth of the
intermediate course.
·
Saw cut the
surface course no later than 48 hours after paving.
·
Accurately locate
saw cuts over joints with pins or stakes before paving. The Engineer shall approve the method of
joint marking before any resurfacing operations begins.
·
Final saw cuts
shall be 2 inches deep with a sealant reservoir that is 3/8 inch wide by 3/4
inch and is recessed 1/8 below the surface.
·
Dry cut joints
shall be cleaned using compressed air by way of an air compressor with a
minimum rated capacity of 100 psi. Wet
cut joints require water blast cleaning followed by drying with a propane torch
or lance unit (409.03
has details on lance unit requirements).
·
The saw cut shall
extend over the full pavement width including paved shoulders.
·
The joint is to
be kept clean until sealing; traffic is not permitted to damage the joint
before sealing. Damaged saw cuts must be
repaired prior to sealing
·
The sealer is to
be heated per the manufacturer’s directions.
·
The first gallon
of material that flows out of the applicator wand at the start of the day is to
be discarded and not used.
Prior to sealing, a backer
rod must be placed in the clean joint and the liquid sealant immediately placed
in the joint using a nozzle that is inserted into the joint and reservoir
completing filling the joint. The
sealant level after cooling should be not more than 1/8 inch below the pavement
surface.
1. Document when the saw cuts are made with respect to
paving.
2. Review, approve, and document method for locating
joints.
3. Measure and document depth and width of saw cuts.
4. Document joint cleaning methods, placement of backer
rod, and installation of sealant.
5. Document measurements on CA-D-2
or other approved forms.