8−111a. General. Repairs accomplished by the form and cast-in-place method shall be performed in accordance with the applicable requirements of Section 808, CAST-IN-PLACE STRUCTURE CONCRETE MASONRY of these specifications.
b.Bonding to Existing Surfaces. Prior to placing the Cast-in-Place Concrete, surfaces shall be prepped in accordance with these specifications or as indicated on the Plans.
c.Use of Self Consolidating Concrete (SCC) in Form and Cast-in-Place Concrete. SCC concrete may be used for form and cast-in-place concrete repairs or as indicated on the plans. Concreting procedures shall be performed by pers onnel experienced with the placement of SCC mixes. All repair areas shall be adequately formed to contain the proposed SCC material, and all resulting holes from the required formwork fasteners shall be properly filled with an approved cementitious material. Special care shall be taken so that the form is properly sealed against leaks, since SCC is more fluid than standard mixes. If excessive surface voids are observed when stripping a form, further placements of the SCC shall cease until the mix and/or placement problem is identified and corrected to the satisfaction of the Engineer.
d.Final Finish. All exposed surfaces shall be finished straight and true, approximating the original contour as close as practicable. The final finish shall be as indicated on the plans.
817.04 METHOD OF MEASUREMENT. "Repairs to Structure Concrete Masonry - Pneumatically
Applied Mortar", "Repairs to Structure Concrete Masonry - Patching Mortar" and "Repairs to Structure Concrete Masonry - Form and Cast-in-Place Concrete" will be measured by either the number of “Square Feet” or “Cubic Feet” of new concrete actually placed in accordance with the Contract Documents and/or as directed by the Engineer.
817.05 BASIS OF PAYMENT . The accepted quantities of "Repairs to Structure Concrete
Masonry - Pneumatically Applied Mortar", "Repai rs to Structure Concrete Masonry - Patching Mortar" and "Repairs to Structure Concrete Masonry - Form and Cast-in-Place Concrete" will be paid for at the respective contract unit prices per “Square Feet” or “Cubic Feet” as designated in the Proposal. The price so stated shall constitute full and complete compensation for all labor, materials, equipment, and all incidentals required to finish the work, comple te in place and accepted by the Engineer. Steel reinforcing bars and wire mesh reinforcement will be paid for separately by Force Account in accordance with the provisions of Subsection 109.04 of these specifications, or when applicable will be paid under the respective pay item for Reinforcing Steel Section 810 . SECTION 818 PORTLAND CEMENT CONCRETE BRIDGE DECK REPAIR
818.01 DESCRIPTION. This work consists of removing deteriorated concrete from bridge deck
surfaces, erecting form-work and the placement of new Portland cement concrete, all as indicated on the contract drawings and in accordance with these Specifications. 8−112 a. Partial Depth Removal. The limits of partial depth concrete removal shall be those areas for which deteriorated concrete extends less than 50 percent of the depth of the original deck as indicated on the contract drawings.
b.Full Depth Removal. The limits of full depth concrete removal shall be those areas for which deteriorated concrete extends more than 50 percent of the depth of the original deck as indicated on the contract drawings.
818.02 MATERIALS. Materials shall conform to the following requirements:
818.02.1 Concrete shall conform to the requirements for Class HP material as set forth in
Subsections 601.01.1 and 601.03.1; Classification and Proportioning, of these Specifications, with the exception that the coarse aggregat e gradation shall meet the requirements of Subsection
M.02.03 for aggregate size ½” or 3/8”. The size used shall be at the discretion of the Contractor.
818.02.2 Epoxy Adhesive shall be an all-purpose, high-strength, moisture-insensitive, rigid epoxy
adhesive. Such adhesive shall be listed on the Department’s approved materials list. The Contractor shall ensure that the material used is compatible with the surfaces to be bonded.
818.02.3 Reinforcement shall conform to the requirements for ASTM 615 Grade 60 Reinforcing
Steel as set forth in Section 810 of these Specifications.
818.03 Construction Methods.
818.03.1 Removal of Deteriorated Concrete. Removal of concrete shall be performed in a
workmanlike manner to prevent damage to the bridge deck that is to remain. Any damage to remaining portions of the bridge deck or to the structural girders caused by the Contractor's operations shall be repaired or replaced by the Contractor, at his own expense and to the satisfaction of the Engineer. All loose, deteriorated or unsound concrete shall be removed as designated by the Engineer. A saw cut to an approximate depth of 3/4-inch shall be made along all boundaries of the repair patches prior to removal, except those patches bounded by the bridge curbing. Particular care shall be taken not to cut into the top mat of bridge deck reinforcing steel. Concrete removal shall be performed in a manner that will not damage reinforcing steel or saw cut areas at the repair boundaries. Any damage caused by the concrete removal process shall be repaired at the Contractor’s expense. The concrete deck shall be removed to a mini mum depth of 1 inch. "Jackhammers" heavier than nominal 30-pound class shall not be used. "Chipping Hammers" heavier than a nominal 15-pound class shall not be used to remove concrete from areas beneath reinforcing bars. Hand tools such as hammers and chisels shall be provided for removal of particles of unsound concrete or to achieve the required depth throughout the repair areas, including the saw cut edges. In no case shall pneumatic tools be placed in direct contact with reinforcing steel so as to damage its bond to the surrounding concrete. In areas where reinforcing steel is found to be surrounded by deteriorated concrete or where at least one-half of its surface area is exposed, the depth of concrete removal shall be such to include all deteriorated concrete but not less than that depth necessary to allow for 3/4-inch
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 445–446 of 826.