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 446–446 of 826.