Jansen Inc 6/10/2019 - Laserfiche WebLink

I 1 Scarification, and removal of the upper layer of concrete overlay when present, may 2 proceed during the final cleaning and overlay placement phases of the Work on adjacent 3 portions of the Structure so long as the scarification and concrete overlay removal 4 operations are confined to areas which are a minimum of 100 feet away from the defined 5 limits of the final cleaning or overlay placement in progress. If the scarification and concrete 6 overlay removal impedes or interferes in any way with the final cleaning or overlay 7 placement as determined by the Engineer, the scarification and concrete overlay removal 8 Work shall be terminated immediately and the scarification and concrete overlay removal 9 equipment removed sufficiently away from the area being prepared or overlaid to eliminate 10 the conflict. If the grade is such that water and contaminants from the scarification and 11 concrete overlay removal operation will flow into the area being prepared or overlaid, the 12 scarification and concrete overlay removal operation shall be terminated and shall remain 13 suspended for the first 24 hours of curing time after the completion of concrete placement. I 14 15 6-09.3(11) Placing Concrete Overlay 16 The first sentence of item number 3 in the fourth paragraph is revised to read: 17 18 Concrete shall not be placed when the temperature of the concrete surface is less than 19 45°F or greater than 75°F, and wind velocity at the construction site is in excess of 10 mph. 20 21 6-09.3(12) Finishing Concrete Overlay 22 The third paragraph is deleted. 23 24 The last paragraph is deleted. 25 26 6-09.3(13) Curing Concrete Overlay 27 The first sentence of the first paragraph is revised to read: 28 29 As the finishing operation progresses, the concrete shall be immediately covered with a 30 single layer of clean, new or used, wet burlap. 31 32 The last sentence of the second paragraph is deleted. I 33 34 The following two new paragraphs are inserted after the second paragraph: 35 36 As an alternative to the application of burlap and fog spraying described above, the 37 Contractor may propose a curing system using proprietary curing blankets specifically 38 manufactured for bridge deck curing. The Contractor shall submit a Type 2 Working 39 Drawing consisting of details of the proprietary curing blanket system, including product 40 literature and details of how the system is to be installed and maintained. 41 42 The wet curing regimen as described shall remain in place for a minimum of 42-hours. 43 44 The last paragraph is deleted. 45 46 6-09.3(14) Checking for Bond 47 The first sentence of the first paragraph is revised to read: 48 I City of Everett Page AM-60 Amendments Everett Downtown Streetscape Improvement March 22, 2019