Ariston Pacific, Inc. 5/9/2016 - Laserfiche WebLink

I 1 bridge approach slab. The continuous wet cure shall be established as soon as the I 2 concrete has set enough to allow covering without damaging the finish. 3 4 In the fifth paragraph, the first sentence is revised to read: 5 I6 If the Plans call for an asphalt overlay on the bridge approach slab, the Contractor shall 7 use the clear curing compound (Type 1, Class B), applying at least 1 gallon per 150 8 square feet to the concrete surface. 19 10 The eighth paragraph is deleted. 11 I 12 6-02.3(11)A2 Slip-Form Barrier 13 In the fourth paragraph, item number 1, "Type 1D" is revised to read "Type 1". 14 I 15 6-02.3(11)B Curing Bridge Decks 16 This new section is supplemented with the following new sub-sections: 17 I 18 6-02.3(11)B1 Equipment 19 The Contractor shall maintain a wet sheen, without developing pooling or sheeting 20 water, using a fogging apparatus consisting of pressure washers with a minimum nozzle 21 output of 1,500 psi, or other means approved by the Engineer. 22 23 The Contractor shall submit a bridge deck curing plan to the Engineer a minimum 14 24 calendar days prior to the pre-concreting conference. The Contractor's plan shall I25 describe the sequence and timing that will be used to fog the bridge deck, apply pre- 26 soaked burlap, install soaker hoses and cover the deck with white reflective sheeting. 27 1 28 6-02.3(11)62 Curing 29 The fogging apparatus shall be in place and charged for fogging prior to beginning 30 concrete placement for the bridge deck. I 31 32 The Contractor shall presoak all burlap to be used to cover the deck during curing. 33 I 34 Immediately after the finishing machine passes over finished concrete, the Contractor 35 shall implement the following tasks: 36 I 37 1. The Contractor shall fog the bridge deck while maintaining a wet sheen without 38 developing pooling or sheeting water. 39 40 2. The Contractor shall apply the presoaked burlap to the top surface to fully I 41 cover the deck without damaging the finish, other than minor marring of the 42 concrete surface. The Contractor shall not apply curing compound. 43 44 3. The Contractor shall continue to keep the burlap wet by fog spraying until the 45 burlap is covered by soaker hoses and white reflective sheeting. The 46 Contractor shall place the soaker hoses and whiter reflective sheeting after the I 47 concrete has achieved initial set. The Contractor shall charge the soaker 48 hoses frequently so as to keep the burlap covering the entire deck wet during 49 the course of curing. I 50 51 As an alternative to tasks 2 and 3 above, the Contractor may propose a curing system 52 using proprietary curing blankets specifically manufactured for bridge deck curing. I I AMENDMENTS TO THE 2014 STANDARD SPECIFICATIONS BOOK Revised: 8/3/15