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Material <br />Spec. <br />bridge <br />2406.2 <br />2411.2 <br />2461.2 <br />2461.3 <br />general <br />2301** <br />2452.2 <br />2461.2 <br />2461.3 <br />2506.2 <br />2511.2 <br />2514.2 <br />2520.2 <br />2521.2 <br />2531.2 <br />2533.2 <br />2545.2 <br />2554.2 <br />2557.2 <br />2564.2 <br />2565.2 <br />SALT Schedule of Materials Control - Local Government Agency <br />CERTIFIED READY -MIX CONCRETE, 1 of 2 <br />The Prime Contractor is responsible to assure that all ready -mix concrete used is produced by an annually <br />Certified Ready -Mix plant as detailed in Specification 2461.3F. <br />Test Type I Producer QC Testing Rates Engineer Testing Rates ( 1 ) I Form <br />(Concrete Manual) Verification companion to QC <br />Concrete Plant Production Testing Rates* <br />Gradation <br />(5-694.145) <br />(5-694.148) <br />Moisture Content <br />(5-694.142) <br />Aggregate Quality <br />(5-694.146) <br />Coarse Aggregate <br />(% Passing 200) <br />(5-694.146) <br />Coarse & Fine: When over 20 yd3 <br />per week, 1 per week or 1 per <br />400 yd3, whichever is greater. <br />Bridge Deck Concrete must have <br />passing gradations prior to mixing. <br />1 every 4 hours <br />Coarse & Fine: 1 per week* <br />per ready -mix plant <br />None <br />Engineer Testing Rates: Minimum of 1 per project per each fraction - <br />use of MnDOT test results for the same 30 day time period is <br />acceptable. For bridge concrete: 1 test each fraction per month. For <br />all bridge deck concrete poured during the month: Test monthly <br />quality to 3137.2D2 for each coarse aggregate fraction. Designate <br />3137.2D2 on the sample card. Gradation results will be included with <br />the monthly quality tests. <br />Minimum Aggregate Sample Size *companion required, double sample size <br />Aggregate Size <br />3/4" Plus, #4 25 Ib. 50 Ib. 2000 g <br />3/4" Minus, #67 25 Ib. 30 Ib. 2000 g <br />#7, CA-70 6 Ib. 30 Ib. 2000 g <br />CA-80, #89 1.1 Ib. (500 g) 30 Ib. 500 g <br />Fine Aggregate 1.1 Ib. (500 g) 30 Ib. 500 g <br />Sampling Locations for Air, Slump, Temperature and Cylinder Testing <br />(1) First Toad each day per mix - Take sample after discharging approximately 1/4 yd3, <br />stop further discharge until both slump and air content test are completed. The first load <br />of concrete must have passing air content and slump prior to placement. Cast strength <br />specimens from the same Toad as the air content and slump test. Test whenever <br />adjustments are made to the mix. <br />(2) Subsequent tests - Sample from the middle portion of the Toad. <br />Test Type Engineer Testing Rates ( 1 ) <br />Air Content - Type 1 test per 200 yd3. For Bridge Concrete: 1 test per 100 yd3. Test <br />3 Concrete first Toad each day per mix. Test when adjustments are made to the <br />(5-694.541) mix. <br />1 test per 200 yd3. For Bridge Concrete: 1 test per 100 yd3. Test <br />first Toad each day per mix, or as necessary to verify passing slump. <br />Not required for slip form placement. <br />Slump <br />(5-694.531) <br />Air and Concrete <br />Temperature <br />(5-694.550) <br />(1 ) - Review the requirements of 2461.3F Certified Ready -Mix Concrete, 2461.3G Concrete Placement and <br />5-694.010 Inspector's Checklist in the Concrete Manual. <br />*Small quantity is 25 yd3 or less per week with no gradation testing or plant monitoring required but remember <br />that Concrete Field Testing is required. <br />Gradation* Quality* Moisture % -200 C.Agg <br />10 Ib. <br />6 Ib. <br />6 Ib. <br />21763 <br />Concrete <br />Agg. <br />Work <br />sheet <br />2449 <br />Weekly <br />Concrete <br />Agg. <br />Report <br />24143 <br />Weekly <br />Certified <br />R-M <br />Plant <br />Report <br />2448 <br />Weekly <br />Concrete <br />Report <br />Record temperature each time air content, slump or compressive <br />strength specimen is performed/fabricated. <br />Contact the MnDOT District IA Inspector to provide servicing of your Federal Aid Project. <br />2017 <br />