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 24IV. Concrete Construction Items (cont.) (www.dot.state.mn.us/materials/concrete.html)Certified Ready-Mix - Concrete Plant ProductionRemarks:(1) Mix design is provided by Mn/DOT unless otherwise specified in the Contract.(2) All gradation and quality tests require companion samples. Samples taken at location identified on Contact Report located at plant.(3) Perform Quality testing as directed by the Concrete Engineer.Minimum Sample Sizes:Gradation Test: Moisture Test: Quality Sample Size for Lab Submittal:+19 mm (3/4” Plus) 12 kg (25 lb.) Coarse Aggregate 2000 g +19 mm (3/4” Plus) 24 kg (50 lb.)–19 mm (3/4” Minus) 5 kg (10 lb.) Fine Aggregate 500 g –19 mm (3/4” Minus) 15 kg (30 lb.)CA-70, CA-80 2.5 kg (6 lb.) Fine Aggregate 15 kg (30 lb.)Sand500 g (1.1 lb.)Pay ItemNo.Test TypeSpec.No.Producer/Contractor Testing Agency Testing Form No.230224012405241124122422245224612506251125142519252125312533254525502554255725642565Gradation Testing(QC/QA)(5-694.145and5-694.148)246131263137When over 20 m 3 (yd 3 ) of Agency concrete produced perday:Coarse: 1 per 100 m 3 (yd 3 )Fine: 1 per 200 m 3 (yd 3 )Passing aggregate gradations are required prior to the start ofconcrete production each day. Performing testing onrepresentative material at the end of the most recent day ofproduction is allowed.Washing the fine aggregate gradation (QC) sample is notrequired when the result on the -75µm (#200) sieve of theunwashed sample is less than 1.0%,Hold QA (QC companion) samples until they are picked upby the Agency monitor. Discard after 14 calendar days if notpicked up.For Contractor Mix Designs utilizing an approved JMF:1 per 400 m 3 (yd 3 ) or completed every 4 hours, whicheverresults in the higher sampling rate.None 21763ConcreteAggregateWorksheet(QC/QA)2449WeeklyConcreteAggregateReport