839REMOVE AND DISPOSE BITUMINOUS CONCRETE PAVEMENT FROM CONCRETE BRIDGE DECKS - PARTIAL-DEPTH AND FULL-DEPTH

839.01 Description.

839.01.1 Partial-Depth Removal. This work consists of the removal and disposal of a portion of the existing bituminous pavement overlay from the concrete bridge deck within the limits indicated

on the Plans or as directed by the Engineer, all in accordance with these Specifications. 839.01.2 Full-Depth Removal . This work shall consist of the complete removal and disposal of the existing bituminous pavement overlay, including the waterproofing membrane, from the concrete bridge deck within the limits indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 839.02 MATERIALS. Not applicable.

839.03 Construction Methods .

839.03.1 Partial-Depth Removal . The Contractor shall ensure that the process of partial pavement

removal will not cause any damage to the waterproofing membrane, underlying concrete deck and/or bridge joints to remain. The Contractor shall also ensure that the method proposed will remove the specified layer thickness of the bituminous wearing surface as indicated on the Plans. Under no circumstances will full depth removal be allowed. The specifications, including gross weight(s) of the proposed equipment and/or machinery to be used for the removal operation shall be submitted to the Engineer for approval a minimum of 14 calendar days prior to the start of work; the Engineer will respond to the Contractor within 7 calendar days of receipt of the Contractor’s submission. The proposed equipment and/or machinery loads shall not exceed the legal load limit or the posted load limit for the bridge, whichever is less. In addition, equipment and/or machinery to be used shall have the capability and precision nece ssary to adhere to the pavement removal depth requirements. Damage caused to the waterproofi ng membrane, bridge deck and/or bridge joints as a result of the Contractor’s operation shall be repaired to the satisfaction of the Engineer at no additional cost to the State. The pavement removal shall be performed in a ccordance with the sequence of construction and traffic controls indicated on the Plans. Where required, the Contractor shall saw cut the pavement to prevent over-breakage into the vehicular travel areas. In the event that this type of over-breakage does occur, the Contractor shall immediately patch the damaged bituminous areas using a bituminous patching material which conforms with SECTION 410, TEMPORARY 8−189PATCHING OF POTHOLES AND TRENCHES , of these Specifications at no additional cost to the State. The removal operation shall not endanger the general public or interfere with the established traffic maintenance plan. All materials removed shall be transported from the site and legally disposed of by the Contractor.

839.03.2 Full-Depth Removal. The Contractor shall ensure that the process of removal of

the pavement and the waterproofing membrane will not cause any damage to the underlying concrete deck and/or bridge joints to remain. The Contractor shall also ensure that the method proposed will completely remove the existing waterproofing membrane to allow for the proposed deck patching repairs and new waterproofing system installation. The Contractor will note that the thickness of the existing pavement may vary. The specifications, including gross weight(s) of the proposed equipment and/or machinery to be used for the removal operation, shall be submitted to the Engineer for approval a minimum of 14 calendar days prior to the start of work; the Engineer will respond to the Contractor within 7 calendar days of receipt of the Contractor’s submission. The proposed equipment and/or machinery loads shall not exceed legal load limit or the posted load limit for the bridge, whichever is less. Damage caus ed to the deck and/or bridge joints as a result of the Contractor’s operation shall be repaired to the satisfaction of the Engineer at no additional cost to the State. The pavement and waterproofing removal shall be performed in accordance with the sequence of construction and traffic controls indicated on the Plans. Where required, the Contractor shall saw cut the pavement to prevent ov er-breakage into the vehicular travel areas. In the event that this type of over-breakage does occur, the Contractor shall immediately patch the damaged bituminous areas using a bituminous patching material which conforms with SECTION 410, TEMPORARY PATCHING OF POTHOLES AND TRENCHES of these Specifications, at no additional cost to the State. The removal operation shall not endanger the general public or interfere with the established traffic maintenance plan. All materials removed shall be transported from the site and legally disposed of by the Contractor. 839.04 METHOD OF MEASUREMENT. “Partial-Depth Removal and Disposal of Bituminous Pavement from Concrete Bridge Decks” and “Full-Depth Removal and Disposal of Bituminous Pavement from Concrete Bridge Decks” will be m easured by the number of square yards of each actually removed in accordance with the Plans and/or as directed by the Engineer. 839.05 BASIS OF PAYMENT.

839.05.1 Partial-Depth Removal. The accepted quantity of “Partial-Depth Removal and Disposal of Bituminous Pavement from Concrete Bridge Decks” will be paid for at the contract unit price per square yard as set forth in the Proposal, which price will constitute full compensation for the complete removal and disposal of bituminous pav ement, and all materials, labor, tools, equipment,

saw cutting, and all incidentals necessary for the proper completion of the work specified, shown on the Plans, complete and accepted by the Engineer. 8−190 839.05.2 Full-Depth Removal . The accepted quantity of “Full-Depth Removal and Disposal of Bituminous Pavement from Concrete Bridge Decks” will be paid for at the contract unit price per square yard as set forth in the Proposal, which price will constitute full compensation for the complete removal and disposal of bituminous pavement, including waterproofing membrane, and all materials, labor, tools, equipment, saw cutting, and all incidentals necessary for the proper completion of the work specified, shown on the Plans, complete and accepted by the Engineer. SECTION 840 DECK SURFACE CONCRETE REMOVAL BY HYDRODEMOLITION 840.01 DESCRIPTION . This work consists of the removal of deteriorated concrete from reinforced concrete bridge deck surfaces by the use of hydrodemolition methods, the provision of adequate containment measures under the bridge deck, the control and diversion of runoff during the hydrodemolition operations, disposal of all concrete and other materials removed by hydrodemolition, and all other incidentals as necessary to complete the work in accordance with the requirements of these Specifications. 840.02 EQUIPMENT . The hydrodemolition equipment shall consist of filtering and pumping units operating in conjunction with a remote controlled robotic device, and if applicable, shall be capable of using river, stream or lake water. The withdrawal of water from any body of water under the jurisdiction of the RI Department of Environmental Management (RIDEM) or the Coastal Resources Management Council (CRMC) shall not be permitted unless such use is authorized by a permit issued by the appropriate regulatory agency. The hydrodemolition equipment shall be capable of producing a water jet through an orifice at a pressure of at least 17,000 psi. The machine shall move the jet transversely across the area and forward or backward so that the entire deck is exposed to the water jet. The movement of the jet shall be accomplished by mechanical means; no manual movement of the water jet will be allowed except at inaccessible areas such as, but not limited to, proximity to the curb and temporary barriers, and at bridge deck expansion joints. The equipment shall operate at a noise level of less than 90 decibels at a distance of 50 feet from either the powerpack unit or the remote robot. 840.02.1 Controls. The hydrodemolition equipment shall have sufficient controls to control and vary the following functions of the machine:

840.02.2 Submissions and Qualifications . Post-qualification by the Engineer of the hydro-

demolition operation is required. The Contractor shall be responsible for any delay if the post-