Mn/DOT SD-15 April 2, 2012 Schedule of Materials Control P a g e 1 ...
Mn/DOT SD-15 April 2, 2012 Schedule of Materials Control P a g e 1 ...
Mn/DOT SD-15 April 2, 2012 Schedule of Materials Control P a g e 1 ...
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<strong>Mn</strong>/<strong>DOT</strong> <strong>SD</strong>-<strong>15</strong> <strong>April</strong> 2, <strong>2012</strong> <strong>Schedule</strong> <strong>of</strong> <strong>Materials</strong> <strong>Control</strong> P a g e 36IV. Concrete Construction Items (cont.) (www.dot.state.mn.us/materials/concrete.html)Concrete Field Testing –Dowel Bar Retr<strong>of</strong>it (DBR)Remarks:(1) Mix Design is Contractor's responsibility with review by <strong>Mn</strong>/<strong>DOT</strong> unless otherwise specified in the Contract.(2) Testing rates apply to concrete that is produced on site. (Not from a certified ready-mix plant.)(3) All field gradation samples shall be taken by the Agency. All gradation and quality tests require companion samples.(4) Perform Quality testing as directed by the Concrete Engineer.Minimum Sample Sizes:Gradation Test:Quality Sample Size for Lab Submittal:CA-80 2.5 kg (6 lb.) Coarse Aggregate 24 kg (50 lb.)Sand 500 g (1.1 lb) Fine Aggregate <strong>15</strong> kg (30 lb.)Pay ItemNo.Test TypeSpec.No.Contractor TestingAgency TestingFormNo.2302 Gradation andQuality TestingincludingCoarse AggregateTesting on-75µm (#200)(QC/Verification)(5-694.145, 5-694.146)and 5-694.148)31263137Prior to concrete production, the Contractorshall provide the Agency with:Aggregate pit numbers1 passing gradation result perfraction per source.No quality test results are required.Test companion samples at Contractor’sdiscretion.1 per fraction prior to concrete production andeach time aggregate is delivered to the site.Identify quality samples with a “Q” on the SampleID Card and the Quality companion sample.2410Sample ID CardDowel Bar Retr<strong>of</strong>it MaterialCompressive Strength(Verification)(5-694.511)23012302NoneDuring the pre-production test operations:1 set <strong>of</strong> 3 cylinders tested at a rate as directed bythe Engineer.Testing may need to be repeated if any problemswith the dowel bar retr<strong>of</strong>it material areencountered.2409ID Card ConcreteTest CylinderFirst day <strong>of</strong> production:1 set <strong>of</strong> 3 cylinders tested at a rate as directed bythe Concrete Engineer.After the first day <strong>of</strong> production:1 cylinder per day during production tested at ratedetermined by Engineer to determine opening totraffic strength.
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