Article 1 — Description
Repair spalling and up to half -depth failures in concrete pavement .
Article 2 — Materials
Furnish either rapid- set concrete or polymer concrete patching material unless otherwise shown on the plans.
2.1 Rapid -Set Concrete. Provide materials meeting the requirements of DMS -4655 , “Concrete Repair
Materials,” Type A or Type B , and listed on the MPL for “Concrete Repair Materials.”
2.2 Polymer Concrete Pa tching Material . Provide polymer concrete patching material s meet ing DMS -6170 ,
“Polymer ic Materials for Patching Spalls in Concrete Pavement,” and listed on the MPL for “ Polymer ic Materials for Patching Spalls in Concrete Pavement.”
Article 3 — Equipment
Furnish equipment in accordance with Item 429, “Concrete Structure Repair,” or as approved.
Article 4 — Work Methods
Repair areas as shown on the plans or as directed. Dispose of debris off the right of way in conformance with federal, state, and local regulations. Repair boundaries should be square or rectangular with a minimum length and width of 12 in. Saw at least 1-1/2 in. deep around repair area before concrete removal, unless otherwise directed by the manufacturer of the repair material being used, providing a vertical face around the perimeter of the repair area. Do not saw - cut longitudinal or transverse steel. If the longitudinal steel is cut or damaged, a full -depth repair may be required as directed without additional compensation. Protect and reuse existing reinforcing steel if encountered, unless otherwise directed. Remove concrete to a depth of at least 1- 1/2 in. or the depth of deteriorated concrete, whichever is greater. Use chipping hammers not heavier than the nominal 15- lb. class or hydrodemolition equipment for the removal of concrete below 1- 1/2 in. depth. Dry and abrasive blast the repair area to ensure it is free of moisture, dirt, grease, oil, or other foreign material that may reduce the bond. Remove dust from the abrasive blasting operation.
4.1 Hydraulic Cement Concrete Material . Prepare the surface in conformance with manufacturer ’s
recommendation. Mix, place, and cure repair material in conformance with manufacturer’s recommendations. Place repair material when the air temperature is 40°F or above. Screed repair material to conform to roadway surface. Provide a rough broom finish.
4.2 Polymer Concrete P atching Material . Submit for approval a statement from the manufacturer identifying
the recommended equipment and installation procedures. Limit repair area depths to no more than 2 in. when using polymer concrete patching materials. Apply primer to the repair area in con formance with manufacturer’s recommendations. Reapply primer if conditions change before placing patching material. Mix, place, and cure in conformance with manufacturer’s recommendations. Begin placement of material at the lower end of sloped areas. Screed polymer concrete patching material to conform to the roadway surface. Provide a non- skid finish using a notched trowel unless otherwise directed by product manufacturer. 972 5. MEASUREMENT This Item will be measured as follows .
5.1 Hydraulic Cement Concrete Material. By the cubic foot of concrete repair material placed.
5.2 Polymer Concrete Pa tching Material . By the gallon of polymer concrete patching material placed.
Article 6 — Payment
The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Spalling Repair” of the type ( “Hydraulic Cement Concrete” ; “Polymer, F lexible ”; or “Polymer, Sem irigid ”) specified. This price is full compensation for sawing, chipping, milling, cleaning, abrasive blasting, repairing spalled concrete pavement, disposal of materials, materials, equipment, labor, tools, and incidentals.