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SPECIAL PROVISIONS - SP20I6 BOOK <br />Last Revision by CO Special Provisions: 2/08/17 <br />No additional submittal is required for Table 2461-4 mix designs. <br />Type of Concrete <br />Field Batched Patching Mix <br />Low Slump Concrete <br />Bagged Patching Mix <br />Mix Number <br />3U18 <br />3U17A <br />3U18 and 3U58M <br />Table 2461-4 <br />Department Designed Concrete Mixes <br />Specification <br />2302 <br />2404 <br />3105 <br />Created August 20, 2015 <br />Page 31 <br />SP 0202-101 <br />Mix Design Location <br />Table 2302-1 <br />Weekly Report of Low Slump Concrete <br />Table 3105-1 <br />F.2.a(2) Grout and Lean Mix Backfill <br />Submit final mix design proportions on the General Concrete Mix Design Submittal for Grout and <br />Lean Mix Backfill in accordance with Table 2461-5. <br />Mix <br />Nu mber <br />1 AGROUT <br />* <br />3AGROUT <br />* <br />Lean Mix II <br />Table 2461-5 <br />Concrete Mix Design Requirements for Grout and Lean Mix Backlit' Mixes <br />Water Cement Fly Ash Fine Coarse o <br />Maximum Content Content Content Aggregate Aggregate /oAir Slump <br />w/c ratio (pounds) (pounds) (pounds) Calculation Calculation Content Range <br />(pounds) (pounds) <br />0.50 379 758 <br />0 100%t <br />0.44 379 865 0 100% 1' 0 <br />1.00 375 125 250 50% t 50% t 1 N/A <br />0 3.0% <br />10.0 <br />As <br />needed <br />As <br />% needed <br />10 in ± <br />1 in <br />Minimum <br />28-day <br />Compressive <br />Strength, f c <br />4000 psi <br />4000 psi <br />75 — 400 # <br />* Do not provide grout containing coarse aggregate or fly ash. <br />II Coarse Aggregate Quality meets requirements of 3137.2.D.1, "Coarse Aggregate for General Use" <br />t After adding the specified quantities of cement, fly ash, and water, provide the remaining aggregate to an <br />absolute volume of 27.00 — 27.27 cu. ft. <br />1 Meeting ASTM #67 gradation as shown in Table 3137-4. <br /># Unconfined compressive strength range. <br />F.2.b Contractor Designed Concrete Mixes <br />The Contractor will provide concrete mix designs for concrete defined in Table 2461-6 and Table <br />2461-7 and elsewhere as specified in the Contract. <br />The Contractor assumes full responsibility for the mix design and performance of the concrete. <br />F.2.b(1) General Concrete Mix Design Requirements <br />The Department defines the concrete mix design requirements for Contractor Designed Mixes in <br />accordance with Table 2461-6. <br />