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I1 The followingnew sentence is inserted before the last sentence of the lastparagraph: <br /> 2 <br /> 1 3 Testing samples of mixes using shrinkage reducing admixture shall use the admixture <br /> 4 amount specified in the mix design submittal. <br /> 5 <br /> I 6 6-02.3(2)B Commercial Concrete <br /> 7 The last sentence of the first paragraph is revised to read: <br /> 8 <br /> I 9 Commercial concrete does not require mix design or source approvals for cement, <br /> 10 aggregate, and other admixtures. <br /> 11 <br /> I 12 6-02.3(6)A1 Hot Weather Protection <br /> 13 This section is revised to read: <br /> 14 <br /> I <br /> 15 <br /> 16 The Contractor shall provide concrete within the specified temperature limits. Cooling of <br /> the coarse aggregate piles by sprinkling with water is permitted provided the moisture <br /> 17 content is monitored and the mixing water is adjusted for the free water in the <br /> I <br /> 18 aggregate. Shading or cooling aggregate piles (sprinkling of fine aggregate piles with <br /> 19 water is not allowed). If sprinkling of the coarse aggregates is to be used, the piles <br /> 20 moisture content shall be monitored and the mixing water adjusted for the free water in <br /> 21 the aggregate. In addition, when removing the coarse aggregate, it shall be removed <br /> 1 22 from at least 1 foot above the bottom of the pile. Refrigerating mixing water; or replacing <br /> 23 all or part of the mixing water with crushed ice, provided the ice is completely melted by <br /> 24 placing time. <br /> 1 25 <br /> 26 If air temperature exceeds 90°F, the Contractor shall use water spray or other accepted <br /> 27 methods to cool all concrete-contact surfaces to less than 90°F. These surfaces include <br /> I 28 forms, reinforcing steel, steel beam flanges, and any others that touch the mix. <br /> 29 <br /> 30 6-02.3(6)A2 Cold Weather Protection <br /> I 31 This section is revised to read: <br /> 32 <br /> 33 Concrete shall be maintained at or above a temperature of 40°F during the first seven <br /> I 34 days of the Cold Weather Protection Period and at or above a temperature of 35°F <br /> 35 during the remainder of the Cold Weather Protection Period. Cold weather protection <br /> 36 requirements do not apply to concrete placed below the ground line. <br /> 37 <br /> I38 Prior to placing concrete in cold weather, the Contractor shall submit a Type 2 Working <br /> 39 Drawing with a written procedure for cold weather concreting. The procedure shall detail <br /> 40 how the Contractor will adequately cure the concrete and prevent the concrete <br /> I 41 temperature from falling below the minimum temperature. Extra protection shall be <br /> 42 provided for areas especially vulnerable to freezing (such as exposed top surfaces, <br /> 43 corners and edges, thin sections, and concrete placed into steel forms). Concrete <br /> I 44 placement will only be allowed if the Contractor's cold weather protection plan has been <br /> 45 accepted by the Engineer. <br /> 46 <br /> I 47 Prior to concrete placement, the Contractor shall review the 7-day temperature <br /> 48 predictions for the job site from the Western Region Headquarters of the National <br /> 49 Weather Service (www.wrh.noaa.gov). When temperatures below 35°F are predicted, <br /> 50 the Contractor shall: <br /> 51 <br /> I <br /> I AMENDMENTS TO THE 2016 STANDARD SPECIFICATIONS BOOK <br /> Revised: 8/1/16 <br />