Combined Construction Inc. 7/22/2020

1 concrete or elastomeric concrete until a time period recommended by the 2 sealant manufacturer. 3 1 4 The Contractor shall clean the bridge expansion joints of all forms, dirt, form oil, 5 grease, and other deleterious material. The Contractor shall clean and prepare 6 the entire joint surface receiving the joint sealant in accordance with the I 7 manufacturer's joint preparation procedure, and as recommended by the 8 sealant manufacturer's technical representative, including two stage abrasive 9 blasting surface preparation and compressed air cleaning. All steel surfaces to 10 be in contact with the joint sealant shall be cleaned to an SSPC-SP10 condition. 11 The joint receiving the sealant shall be sound, clean, dry, and frost free. 12 13 After the cleaned and prepared joint has received the Engineer's approval for I 14 joint dimensions, alignment, and preparation, the Contractor shall apply the 15 primer, as recommended by the sealant manufacturer, to all surfaces to be in 16 contact with the joint sealant. The primer shall dry and cure for the time period 111 17 recommended by the sealant manufacturer for the surface type. 18 19 After the primer is cured, the Contractor shall place the backer rod, and place I 20 the rapid cure silicone sealant in accordance with the joint installation procedure. 21 22 If the joint width at the time of installation is less than 1-inch or greater than three II 23 inches, the Contractor shall not proceed with the expansion joint modification 24 until the installation procedure is revised as recommended by the sealant 25 manufacturer's technical representative. 26 27 After installing the rapid cure silicone sealant, the Contractor shall flood the joint 28 area with water. If leakage is detected, the bridge expansion joint system shall 29 be repaired by the Contractor, as recommended by the sealant manufacturer I 30 and approved by the Engineer. 31 32 6-02.3(24).GR6 , 33 Reinforcement 34 35 6-02.3(24)C.GR6 36 Placing and Fastening 37 38 6-02.3(24)C.INST1.GR6 39 Section 6-02.3(24)C is supplemented with the following: 40 41 6-02.3(24)C.OPT1.GB6 42 (January 7, 2019) 43 Drilling Holes for, and Setting, Steel Reinforcing Bar Dowels 44 Where called for in the Plans, holes shall be drilled into existing concrete to the 45 size and dimension shown in the Plans. The Contractor may use any method 46 for drilling the holes provided the method selected does not damage the 47 concrete and the steel reinforcing bar that is to remain. Core drilling will be 48 required when specifically noted in the Plans. I 49 50 The Contractor shall exercise care in locating and drilling the holes to avoid 51 damage to existing steel reinforcing bars and concrete. Location of the holes I 52 may be shifted slightly with the approval of the Engineer in order to avoid MAPLE HEIGHTS BRIDGE SEISMIC RETROFIT PAGE 90 OF 106 SPECIAL PROVISIONS—Addendum 1 WORK ORDER#3693 MAY 4,2020 FEDERAL AID#BHM-2776(008)