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

I 1 I 2 6-02.3(5)1 Vacant 3 This section, including title, is revised to read: 4 Is 6 6-02.3(5)1 Test Section for Cast-In-Place SCC Unless otherwise approved by the Engineer, the Contractor shall construct a test 7 section of the element being constructed of cast-in-place SCC. The Contractor shall I 8 confirm, through the SCC placement operation in the test section, the SCC flows the 9 distance required, completely filling the forms and encapsulating the reinforcement as 10 required without leaving voids and pockets and causing segregation of the SCC mix. 11 The test section forms, reinforcing steel and concrete placing operations shall be I 12 identical to those to be used in the production elements. 13 14 For horizontal elements, the test section shall simulate the flow of concrete for the U 15 maximum distance anticipated during production concrete placement. The depth and 16 width of the test section for horizontal element may be smaller than the actual depth and 17 width of the element to be cast. For vertical elements, the test section shall be a I18 19 minimum of 33-percent of the height of the tallest element to be constructed. The Contractor shall submit Type 2 Working Drawings consisting of formwork and 20 reinforcement details of the test section and SCC placement procedures. I 21 22 After removing the forms, the test section will be inspected for signs of honeycombs, 23 cracks, aggregate segregation, sedimentation, cold joints, and other surface and 24 concrete placement defects. If such defects are present, the Contractor shall revise the I25 formwork and SCC placement procedures as necessary to eliminate such defects. 26 27 Acceptance of the test section and the SCC mix design is contingent on acceptable I 28 visual inspection, and a minimum of two 4-inch minimum diameter core samples taken 29 from the placement location and the furthest-most limits of the concrete as identified by 30 the Engineer. The number of core locations will be specified by the Engineer. The I 31 difference in average unit weight of the locations represented by the core samples shall 32 be less than 5-percent. 33 I 34 35 The Contractor shall use the same SCC placement procedures confirmed by the Engineer accepted test section for casting the production members. 36 I 37 6-02.3(6)A2 Cold Weather Protection 38 The first sentence in the first paragraph is revised to read: 39 I40 This Specification applies when the weather forecast on the day of concrete placement 41 predicts air temperatures below 35°F at any time during the 7 days following placement. 42 43 The first sentence of the second paragraph is revised to read: I 44 45 The temperature of the concrete shall be maintained above 50°F during the entire 46 curing period or 7 days, whichever is greater. I 47 48 6-02.3(9) Vibration of Concrete 49 This section is supplemented with the following two new paragraphs: I 50 51 Vibration of SCC shall only be used as described below or as approved by the 52 Engineer: I I AMENDMENTS TO THE 2014 STANDARD SPECIFICATIONS BOOK Revised: 8/3/15