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water <br /> 1 a. discharge is completed within 45 minutes after the introduction of mixing <br /> 2 to the cement and aggregates, or <br /> 3 <br /> 4 b. discharge is completed within 60 minutes after the introduction of mixing water <br /> 5 to the cement and aggregates, provided the concrete mix temperature is 70°F <br /> 6 or below during placement, or <br /> 7 <br /> 8 c. discharge is completed within 60 minutes after the introduction of mixing water <br /> 9 to the cement and aggregates, provided the mix contains an approved set <br /> 10 retarder at the manufacturer's minimum dosage rate. <br /> 11 <br /> 12 5-05.3(6) Subgrade <br /> 13 This section, including title, is revised to read: <br /> 14 <br /> 15 5-05.3(6) Surface Preparation <br /> 16 The Subgrade surface shall be prepared and compacted a minimum of 3 feet beyond <br /> 17 each edge of the area which is to receive concrete pavement in order to accommodate <br /> 18 the slip-form equipment. <br /> 19 <br /> 20 Concrete shall not be placed during a heavy rainfall. Prior to placing concrete: <br /> 21 <br /> 22 1. The surface shall be moist; <br /> 23 <br /> 24 2. Excess water (e.g., standing, pooling or flowing) shall be removed from the <br /> 25 surface. <br /> 26 <br /> 27 3. The surface shall be clean and free of any deleterious materials. • <br /> 28 <br /> 29 4. The surface temperature shall not exceed 120°F or be frozen. <br /> 30 <br /> 31 5-05.3(7)A Slip-Form Construction <br /> 32 The second sentence of the first paragraph is revised to read: <br /> 33 <br /> 34 The alignment and elevation of the paver shall be regulated from outside reference lines <br /> 35 established for this purpose, or by an electronic control system capable of controlling111 <br /> 36 the line and grade within required tolerances. <br /> 37 <br /> 38 6-02.AP6 <br /> 39 Section 6-02, Concrete Structures <br /> 40 January 2, 2018 <br /> 41 6-02.3(2)A Contractor Mix Design <br /> 42 The last sentence of the last paragraph is revised to read: <br /> 43 <br /> 44 For all other concrete, air content shall be a minimum of 4.5 percent and a maximum of <br /> 45 7.5 percent for all concrete placed above the finished ground line unless noted <br /> 46 otherwise. <br /> 47 <br /> 48 6-02.3(2)A1 Contractor Mix Design for Concrete Class 4000D <br /> 49 Item number 5 of the first paragraph is deleted. <br /> 50 <br /> 51 Item number 6 of the first paragraph (after the preceding Amendment is applied) is <br /> 52 renumbered to 5. <br /> HOT MIX ASPHALT OVERLAY-2018 PAGE 14 OF 53 March 6,2018 <br /> WORK ORDER#3667 <br /> AMENDMENTS TO STANDARD PROVISIONS <br />