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ii <br /> 2 Item number 6 of the first paragraph (after the preceding Amendment is applied) is <br /> ' 3 renumbered to 5. <br /> 4 <br /> 5 6-02.3(2)B Commercial Concrete <br /> 6 The second paragraph is revised to read: <br /> 7 <br /> 8 Where concrete Class 3000 is specified for items such as, culvert headwalls, plugging <br /> 9 culverts, concrete pipe collars, pipe anchors, monument cases, Type PPB, PS, I, FB and <br /> 10 RM signal standards, pedestals, cabinet bases, guardrail anchors, fence post footings, <br /> 11 sidewalks, concrete curbs, curbs and gutters, and gutters, the Contractor may use <br /> 12 commercial concrete. If commercial concrete is used for sidewalks, concrete curbs, curbs <br /> 13 and gutters, and gutters, it shall have a minimum cementitious material content of 564 <br /> 14 pounds per cubic yard of concrete, shall be air entrained, and the tolerances of Section <br /> 15 6-02.3(5)C shall apply. <br /> ' 16 <br /> 17 6-02.3(4) Ready-Mix Concrete <br /> 18 The first sentence of the first paragraph is revised to read: <br /> ' 19 <br /> 20 All concrete, except lean concrete, shall be batched in a prequalified manual, semi- <br /> 21 automatic, or automatic plant as described in Section 6-02.3(4)A. <br /> ' 22 <br /> 23 6-02.3(4)D Temperature and Time For Placement <br /> 24 The following is inserted after the first sentence of the first paragraph: <br /> ' 25 <br /> 26 The upper temperature limit for placement for Class 4000D concrete may be increased <br /> 27 to a maximum of 80°F if allowed by the Engineer. <br /> 28 <br /> 29 6-02.3(5)C Conformance to Mix Design <br /> 30 Item number 1 of the second paragraph is revised to read: <br /> 31 <br /> 32 1. Cement weight plus 5 percent or minus 1 percent of that specified in the mix design. <br /> 33 <br /> 34 6-02.3(6)A1 Hot Weather Protection <br /> ' 35 The first paragraph is revised to read: <br /> 36 <br /> 37 The Contractor shall provide concrete within the specified temperature limits. Cooling of <br /> 38 the coarse aggregate piles by sprinkling with water is permitted provided the moisture <br /> 39 content is monitored, the mixing water is adjusted for the free water in the aggregate and <br /> 40 the coarse aggregate is removed from at least 1 foot above the bottom of the pile. <br /> 41 Sprinkling of fine aggregate piles with water is not allowed. Refrigerating mixing water or <br /> 42 replacing all or part of the mixing water with crushed ice is permitted, provided the ice is <br /> 43 completely melted by placing time. <br /> ' 44 <br /> 45 The second sentence of the second paragraph is revised to read: <br /> 46 <br /> 47 These surfaces include forms, reinforcing steel, steel beam flanges, and any others that <br /> ' 48 touch the concrete. <br /> 49 <br /> 1 <br />