2005 Technical Process Review Checklist
Item 258 DOWEL BAR RETROFIT
District / Date / Project No. / Co/Rt/Sec.Contractor: / Project/District Contacts:
Review “√” / Specification Conformance Statement / CMS/ CIM / Measurements / Conformance Comments
Equipment
1 / Equipment for sawing slots is power driven gang type assemblies capable of sawing a minimum of three slots at a time. / 258.03
2 / Jack hammers used weigh less than 30 pounds (13.6 kg). / 258.03
3 / Abrasive blast equipment used is capable of removing the saw slurry or other foreign material. / 258.03
4 / Water blasting pressure with abrasives in the water used is 10,000 psi (690 bars or less. / 258.03
Construction
5 / Cracks to be retrofitted are located and mark using aerosol spray paint. / 258.04
6 / Slots cut into the pavement are 2.5 inches (65 mm) wide. / 258.04
7 / Slots cut into the pavement to a depth that places the center of the dowel at mid-depth in the concrete slab. / 258.04
8 / Three slots in each wheel path are cut on one foot centers (0.3 m) spacing. / 258.04 BP-2.6
9 / Saws are not damaging the existing pavement. / 258.04
10 / No traffic including construction traffic is allowed across the crack once the concrete has been removed from the slots. / 258.04
11 / Edges of the slots are cleaned by approved blast methods to produce a rough surface. / 258.04
12 / Blasting operation does not damage the surrounding pavement. / 258.04
13 / Reasonably available engineering controls to limit fugitive dust conform to state, regional, and local government agency requirements. / 258.04
14 / Cracks at the bottom and sides of the slot are sealed with an approved silicone sealant. / 258.04 BP-2.6
15 / Pressure applicator is used to apply the sealant in order to prevent any grout from entering the crack. / 258.04
16 / 1/2 inch (13 mm) thick preformed filler board is place to maintain the crack, as shown in the plan details. / 258.04 BP-2.6
17 / Preformed filler board extends from the bottom of the slot to no more than 1-1/2 inches (38 mm) from the surface of the pavement. / 258.04 BP-2.6
18 / Preformed filler board fits tight around the dowel and to the bottom and edges of the slot. / 258.04
19 / Dowel bars used are 1-1/2 inches (38 mm) in diameter and 18 inches (460 mm) long. / 258.04 BP-2.6
20 / Expansion caps are tight fitting and non-metallic material allowing 1/4 inch (6 mm) movement at each end of the dowel. / 258.04 BP-2.6
21 / Dowel bars are coated with a thin layer of bond-breaking material. / 258.04
22 / Two chairs are used to firmly hold the dowel bar in the slot during placement of the patching material. / 258.04 BP-2.6
23 / Chairs used are a nominal 2-1/2 inch (65 mm) wide and center the dowel bar across the crack. / 258.04 BP-2.6
24 / Dowels vary no more than 1/4 inch from parallel to the pavement surface, the centerline of the pavement and mid depth of slab. / 258.04
25 / One or more passes of an air blast is made just prior to placement of the patching material. / 258.04
26 / Patching material is consolidated using a vibrator. / 258.04
27 / Cracks are re-established using hand and pushed single blade saw.
(1-1/2 inch deep by 1/4 inch wide). / 258.04
28 / Saw cut are made within four hours of placing the patching material. / 258.04
29 / Patching material is cured for a minimum of four hours before placing any traffic including construction traffic on the repair. / 258.04
Documentation(Measurement & Payment)
30 / Actual dowels in the complete and accepted work are counted for pay. / 258.05 258.06
31 / The location of the repair, is documented on a CA-D-3A or 3B / CIM