McCann Construction Enterprises Inc 11/7/2018

I 1 I 2 5-04.3(4)A Crack Sealing 3 I 4 5-04.3(4)A1 General 5 When the Proposal includes a pay item for crack sealing, seal all cracks 1/4 inch in width 6 and greater. I 7 8 Cleaning: Ensure that cracks are thoroughly clean, dry and free of all loose and foreign 9 material when filling with crack sealant material. Use a hot compressed air lance to dry 10 and warm the pavement surfaces within the crack immediately prior to filling a crack with 11 the sealant material. Do not overheat pavement. Do not use direct flame dryers. Routing 12 cracks is not required. 13 14 Sand Slurry: For cracks that are to be filled 'with sand slurry, thoroughly mix the 15 components and pour the mixture into the cracks until full. Add additional CSS-1 cationic 16 emulsified asphalt to the sand slurry as needed for workability to ensure the mixture will 17 completely fill the cracks. Strike off the sand slurry flush with the existing pavement 18 surface and allow the mixture to cure. Top off cracks that were not completely filled with 19 additional sand slurry. Do not place the HMA overlay until the slurry has fully cured. 20 21 The sand slurry shall consist of approximately 20 percent CSS-1 emulsified asphalt, I 22 approximately 2 percent portland cement, water (if required), and the remainder clean 23 Class 1 or 2 fine aggregate per section 9-03.1(2). The components shall be thoroughly 24 mixed and then poured into the cracks and joints until full. The following day, any cracks 25 or joints that are not completely filled shall be topped off with additional sand slurry. After 26 the sand slurry is placed, the filler shall be struck off flush with the existing pavement 27 surface and allowed to cure. The HMA overlay shall not be placed until the slurry has 28 fully cured. The requirements of Section 1-06 will not apply to the portland cement and 29 sand used in the sand slurry. 30 I 31 In areas where HMA will be placed, use sand slurry to fill the cracks. 32 I 33 In areas where HMA will not be placed, fill the cracks as follows: 34 35 1. Cracks 1/4 inch to 1 inch in width - fill with hot poured sealant. I 36 2. Cracks greater than 1 inch in width —fill with sand slurry. 37 I 38 Hot Poured Sealant: For cracks that are to be filled with hot poured sealant, apply the 39 material in accordance with these requirements and the manufacturer's 40 recommendations. Furnish a Type 1 Working Drawing of the manufacturer's product I 41 information and recommendations to the Engineer prior to the start of work, including the 42 manufacturer's recommended heating time and temperatures, allowable storage time 43 and temperatures after initial heating, allowable reheating criteria, and application 44 temperature range. Confine hot poured sealant material within the crack. Clean any 45 overflow of sealant from the pavement surface. If, in the opinion of the Engineer, the 46 Contractor's method of sealing the cracks with hot poured sealant results in an N. BROADWAY TRANSIT IMPROVEMENT PROJECT STATE FUND#GCB2316; COE WO#3644 80 August 8, 2018