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1 6-08.AP6 <br /> 2 Section 6-08, Bituminous Surfacing on Structure Decks <br /> 3 January 2, 2018 ' <br /> 4 6-08.3(7)A Concrete Deck Preparation <br /> 5 The first sentence of the first paragraph is revised to read: <br /> 6 <br /> 7 The Contractor, with the Engineer, shall inspect the exposed concrete deck to establish <br /> 8 the extent of bridge deck repair in accordance with Section 6-09.3(6). <br /> 9 <br /> 10 6-09.AP6 <br /> 11 Section 6-09, Modified Concrete Overlays <br /> 12 August 6, 2018 <br /> 13 6-09.3 Construction Requirements <br /> 14 This section is supplemented with the following new subsection: <br /> 15 <br /> 16 6-09.3(15) Sealing and Texturing Concrete Overlay <br /> 17 After the requirements for checking for bond have been met, all joints and visible cracks <br /> 18 shall be filled and sealed with a high molecular weight methacrylate resin (HMWM). The <br /> 19 Contractor may use compressed air to accelerate drying of the deck surface for crack <br /> 20 identification and sealing. Cracks 1/16 inch and greater in width shall receive two <br /> 21 applications of HMWM. Immediately following the application of HMWM, the wetted <br /> 22 surface shall be coated with sand for abrasive finish. <br /> 23 <br /> 24 After all cracks have been filled and sealed and the HMWM resin has cured, the concrete <br /> 25 overlay surface shall receive a longitudinally sawn texture in accordance with Section 6- <br /> 26 02.3(10)D5. <br /> 27 <br /> 28 Traffic shall not be permitted on the finished concrete until it has reached a minimum <br /> 29 compressive strength of 3,000 psi as verified by rebound number determined in <br /> 30 accordance with ASTM C805 and the longitudinally sawn texture is completed. <br /> 31 <br /> 32 6-09.3(1)B Rotary Milling Machines <br /> 33 This section is revised to read: <br /> 34 <br /> 35 Rotary milling machines used to remove an upper layer of existing concrete overlay, when <br /> 36 present, shall have a maximum operating weight of 50,000 pounds and conform to <br /> 37 Section 6-08.3(5)B. <br /> 38 <br /> 39 6-09.3(1)C Hydro-Demolition Machines <br /> 40 The first sentence of this section is revised to read: <br /> 41 <br /> 42 Hydro-demolition machines shall consist of filtering and pumping units operating in <br /> 43 conjunction with a remote-controlled robotic device, using high-velocity water jets to <br /> 44 remove sound concrete to the nominal scarification depth shown in the Plans with a single <br /> 45 pass of the machine, and with the simultaneous removal of deteriorated concrete. <br /> 46 <br /> 47 6-09.3(1)D Shot Blasting Machines <br /> 48 This section, including title, is revised to read: <br />