2020-12-28_GENERAL DOCUMENTS - M1977300 (23)

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VJAGW Compressive Strength of Concrete Report#:CC-000000 p 9 Report Date: C-000004 Test Method:ASTM C 39 Sample:39157 A . WAS'SLNl AR, IN' Field Services Client: Project: 2180 South Ivanhoe Street,Suite 5 Alexco Water and Environmental 201007 Denver,CO 80222 131 East Lincoln Avenue TR-28 North Waste Phone:(303)759-8100 Suite 200 Rock Pile Diversion Channel(Schwartzwalder M... Fort Collins,CO 80524 Golden,CO Sample Details Set#: 2 Technician: Caperton, Mason Batched: 12:19 MDT Specimen Size: 4"X 8" Cast By: Caperton, Mason Sampled: 13:35 MDT Specimens In Set: 5 Date Cast: 08/13/20 Cast: 13:50 MDT Truck/Ticket#: 1110/20291480 Sampled From: Chute Truck Empty: Contractor: Ensero Schwartzwalder Placement Method: Chute Placement Time: Location Placement Location: Wall Location Details: Rock pile diversion channel,water capture structure,6+00 Sample Location/Notes: Cylinders left NTP Batch Log Specifications Supplier: BURNCO Mix Design: 45C2N1C4C Strength: 4500(psi) On-Site Admixtures: None Air: 5.0-8.0(%) Slump: 1 -4(in) Field Measurements Weather: Clear Slump(in): 4(ASTM C143) Plastic Unit Weight: 139.8(lb/ft3) (ASTM C138) Air Temperature(F): 80 Concrete Temp(F): 78(ASTM C1064) Air Content: 6.5(ASTM C231) Load Volume: 5.5(yd3) Standard Cure Field Cure Min/Max Temp(F): 65/75 Lab Test Results Specimen Test Test Field/Lab Average Cylinder Cylinder Max Load Strength Fracture Break Capping Number Age Days Date Cure Days Diameter(in) Area(inz) (Ibs) (psi) Type Remark Method 2-1 7 08/20/20 4/3 4.01 12.63 50,825 4,020 6 N 2-2 31 09/13/20 4/27 4.00 12.57 71,575 5,690 3 N 2-3 31 09/13/20 4/27 4.00 12.57 75,000 5,970 3 N 2-4 31 09/13/20 4/27 4.00 12.57 79,380 6,320 3 N 2-5 56 H 10/08/20 4/52 Test Age Average Strengths(psi):7 Day-4020,31 Day-5990 Capping Methods Tested By: David Nunez(1,2,3,4,5) N: Unbonded Caps(ASTM C1231) Checked In :08/17/2020(1,2,3,4,5) General Remarks 5.50 of 5.50 yards TYPE 1 TYPE 2 TYPE 3 TYPE 4 TYPE 5 TYPE 6 Reviewed by Thomas Hastings Sample obtained in general conformance with ASTM C172. Compressive strength conducted in general conformance with ASTM Page 1 of 1 C39.The Contractor was informed of field testing results.The Contractor is responsible for security and initial curing environment of the specimens in accordance with ASTM C31.