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3HE52 <br />3YHE52 <br />3RHE52 <br />SPECIAL PROVISIONS - SP20I6 BOOK <br />Last Revision by CO Special Provisions: 2/08/17 <br />Created August 20, 2015 <br />Page 33 <br />SP 0202-101 <br />F.2.b(2) High -Early Concrete Mix Design Requirements <br />The Department defines High -Early (HE) concrete as concrete designed to achieve the minimum <br />strength of 3000 psi for opening at 48 hours. Unless otherwise included in the plans, all HE concrete <br />requires approval of the Engineer prior to incorporation into the work. <br />The Engineer will allow one of the following methods to determine minimum time to opening: <br />(1) <br />(2) <br />Field control cylinders in accordance with 2461.3.G.5.c, "Field Control Strength <br />Cylinders." <br />Maturity method in accordance with 2461.3.G.6, "Estimating Concrete Strength by the <br />Maturity Method." <br />The Department defines the concrete mix design requirements for High -Early concrete in <br />accordance with Table 2461-7. <br />Mix <br />Number <br />Concrete <br />Grades <br />Allowed <br />Table 2461-7 <br />High -Early (HE) Concrete Requirements <br />(Not applicable to Bride Superstructure or Mass Concrete) <br />Maximum Minimum <br />Maximum Cementitious Slump Strength <br />w/c ratio Content Range to <br />(lbs/ yd3) * Opening <br />1-3" <br />Minimum <br />Time to <br />Opening <br />3HE32 F 48 hrs 0.42 750 <br />B, F, G 48 hrs 0.42 750 <br />Y <br />(Repairs <br />Only) <br />R <br />(Repairs <br />Only) <br />* Supplementary Cementitious Materials allowed. <br />II Adjust slump in accordance with 2461.3.G.7.a,"Concrete Placed by the Slip -form Method." <br />3000 psi <br />Minimum <br />28-day 3137 <br />Compressive Spec. <br />Strength, f c <br />4500 psi 2.D.1 <br />48 hrs 0.42 750 <br />48 hrs 0.42 750 <br />2 — 5" 3000 psi <br />2 — 5" 3000 psi <br />2 — 5" 3000 psi <br />4500 psi 2.D.1 <br />4000 psi 2.D.2 <br />4000 psi 2.D.3 <br />F.2.b(3) Project Specific Mix Design Requirements <br />Submit project specific contractor designed mixes on the Project Specific Mix Design Submittal <br />forms in accordance with Table 2461-8 and the Contract. <br />Concrete <br />Grade <br />A <br />W and Y <br />HPC <br />MC <br />CLSM <br />Table 2461-8 <br />Project Specific Contractor Designed Mixes <br />Intended Use Specification <br />Concrete Pavement <br />Precast Concrete <br />High Performance Concrete <br />Mass Concrete <br />Cellular Concrete Grout <br />2301 <br />2462 <br />Special Provision 2401 <br />Special Provision 2401 <br />2519 <br />S-32.11 MnDOT 2461.2.F.3 shall be deleted and replaced with the following: <br />F.3 Submittal Requirements <br />3137 Spec. <br />2.D.3 <br />Varies <br />2.D.2 <br />Varies <br />None <br />