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SPECIAL PROVISIONS - SP20I6 BOOK <br />Last Revision by CO Special Provisions: 2/08/17 <br />Concrete <br />Grade <br />Mix <br />Number <br />Intended <br />Use II <br />Table 2462-6 <br />Precast Concre e Mix Design Requirements <br />Maximum <br />Cementitious %SCM <br />Content (Fly Ash/ <br />(lbs/cy) Slag/ <br />Ternary) <br />Maximum <br />w/c ratio <br />Precast <br />M 3M82 Concrete 0.45 530 — 750 30/35/40 <br />Barrier <br />* The Precaster may c loose to use tle Coarse Aggregate Designation "1" for the 4th digit in accordance with <br />Table 2462-3, if allowed by the structure. <br />II If the intended use is not included elsewhere in the Specification or Special Provisions, design concrete mix <br />3W82. <br />Review the Plans to determine if the bridge girders require air entrainment. <br />$ Flowable slumps exceeding the designated slump range require approval of the MnDOT State Materials <br />Engineer. <br /># Requires strength cylinders in accordance with 2462.3.G.4 for determining shipping strength. <br />Slump <br />Range <br />Created August 20, 2015 <br />Page 51 <br />SP 0202-101 <br />Minimum <br />Compressive 3137 <br />Strength, Pc Spec. <br />(28-day) # <br />1 — 8" 4500 psi 2.D.1 <br />S-33.8 The second paragraph of MnDOT 2462.2.F.3 shall be deleted and replaced with the following: <br />Design the concrete mix to an absolute volume of 27.00 — 27.27 cu. ft [1.0 —1.01 cu. m]. <br />S-33.9 MnDOT 2462.3.G.1 shall be deleted and replaced with the following: <br />G.1 Placement Temperatures <br />Maintain concrete at a temperature from 50 °F to 90 °F until placement. <br />Unless approved cold -weather plans are in -place, do not place concrete when the air temperature <br />is either of the following at the point of placement: <br />(1) <br />(2) <br />Below 36 °F, or <br />The National Weather Service predicts the temperature to fall below 36 °F within the <br />following 24 h period. <br />S-33.10 MnDOT 2462.3.G.4 shall be deleted and replaced with the following: <br />G.4 Test Methods and Specimens <br />Perform sampling and testing in accordance with the Concrete Manual and test according to the <br />requirements of the Schedule of Materials Control. <br />Anyone fabricating concrete cylinders is required to hold either a current ACI Field 1 Technician <br />Certification or a MnDOT Field 1 Technician Certification. <br />Anyone performing concrete strength testing of cylinders is required to hold one of the following <br />current certifications: <br />(1.1) ACI Strength Testing Technician Certification, <br />(1.2) MnDOT Strength Testing Technician Certification, or <br />(1.3) WisDOT Strength Testing Technician Certification. <br />Fumish molds based on the maximum size aggregate for the test specimens in accordance with the <br />following: <br />(2.1) 4 in x 8 in cylinder molds, <br />(2.2) 6 in x 12 in cylinder molds for maximum aggregate sizes greater than 11/4 in. <br />G.4.a Strength Cylinders <br />