Rodarte Construction Inc Everett Station Parking Expansion

1 6-02.3(2)A1 Contractor Mix Design for Concrete Class 4000D 2 Item number 5 of the first paragraph is deleted. 3 4 Item number 6 of the first paragraph (after the preceding Amendment is applied) is renumbered 5 to 5. 6 7 6-02.3(2)B Commercial Concrete 8 The second paragraph is revised to read: 9 10 Where concrete Class 3000 is specified for items such as, culvert headwalls, plugging 11 culverts, concrete pipe collars, pipe anchors, monument cases, Type PPB, PS, I, FB and 12 RM signal standards, pedestals, cabinet bases, guardrail anchors, fence post footings, 13 sidewalks, concrete curbs, curbs and gutters, and gutters, the Contractor may use 14 commercial concrete. If commercial concrete is used for sidewalks, concrete curbs, curbs 15 and gutters, and gutters, it shall have a minimum cementitious material content of 564 16 pounds per cubic yard of concrete, shall be air entrained, and the tolerances of Section 6- 17 02.3(5)C shall apply. 18 19 6-02.3(4) Ready-Mix Concrete 20 The first sentence of the first paragraph is revised to read: 21 22 All concrete, except lean concrete, shall be batched in a prequalified manual, semi- 23 automatic, or automatic plant as described in Section 6-02.3(4)A. 24 25 6-02.3(4)D Temperature and Time For Placement 26 The following is inserted after the first sentence of the first paragraph: , 27 28 The upper temperature limit for placement for Class 4000D concrete may be increased to a 29 maximum of 80°F if allowed by the Engineer. 30 31 6-02.3(5)C Conformance to Mix Design 32 Item number 1 of the second paragraph is revised to read: 33 34 1. Cement weight plus 5 percent or minus 1 percent of that specified in the mix design. 35 36 6-02.3(6)A1 Hot Weather Protection 37 The first paragraph is revised to read: 38 39 The Contractor shall provide concrete within the specified temperature limits. Cooling of the 40 coarse aggregate piles by sprinkling with water is permitted provided the moisture content 41 is monitored, the mixing water is adjusted for the free water in the aggregate and the 42 coarse aggregate is removed from at least 1 foot above the bottom of the pile. Sprinkling of 43 fine aggregate piles with water is not allowed. Refrigerating mixing water or replacing all or 44 part of the mixing water with crushed ice is permitted, provided the ice is completely melted 45 by placing time. 46 1 47 The second sentence of the second paragraph is revised to read: 48 49 These surfaces include forms, reinforcing steel, steel beam flanges, and any others that 50 touch the concrete. City of Everett Page AM-36 Amendments Everett Station 80 Stall Parking Expansion June 2019