HomeMy WebLinkAbout2025-10-08 - Lindbergh High School Field Improvements - 25B121-01 - 5200_Compressive Strength of Concrete_000007 (2)Specimen
Number
Test
Age Days
Test
Date
Field / Lab
Cure Days
Average Cylinder
Diameter (in)
Cylinder
Area (in²)
Max Load
(lbs)
Strength
(psi)
Fracture
Type
Break
Remark
Capping
Method
7-1 7 10/15/25 1 / 6 4.00 12.57 47,014 3,740 2 U
7-2 28 11/05/25 1 / 27 3.99 12.50 67,885 5,430 1 CP U
7-3 28 11/05/25 1 / 27 3.99 12.50 70,493 5,640 1 CP U
7-4 28 11/05/25 1 / 27 3.99 12.50 69,511 5,560 2 CP U
7-5 28 11/05/25 1 / 27 3.99 12.50 71,561 5,720 3 CP U
Test Age Average Strengths (psi): 7 Day - 3740, 28 Day - 5590
CP: Compressive Strength meets project requirements at design strength age.
Tested By: Paul Fuentes (1,2,3,4,5)
Checked In : 10/09/2025 (1,2,3,4,5)
Capping Methods
U: Unbonded Caps (ASTM C1231)
Set #:7
Specimen Size:4" X 8"
Specimens In Set:5
Truck / Ticket #:1173 / 1257288
Contractor:Needed Construction
Technician:Tesfaldet Michael
Cast By:Tesfaldet Michael
Date Cast:10/08/25
Sampled From:Chute
Placement Method:Pump
Sample Details
Batched:12:26 PDT
Sampled:13:10 PDT
Cast:13:20 PDT
Truck Empty:13:50 PDT
Placement Time:84 (min)
Placement Location:Building Interior - Foundation Wall
Location Details:Site improvement, rail foundation wall
Sample Location / Notes:Lowest foundation wall
Batch Log
Strength:5000 (psi)
Specifications
Supplier:Miles
Plant:202
Sample Condition:
Mix Design:1250AFG
On-Site Admixtures: None
Location
Field Measurements
Plastic Unit Weight:
Air Content:5.0
Load Volume:11.00 (yd³)
Weather:Sunny, 67°F Slump (in):5
Air Temperature (F):64 Concrete Temp (F):67
Lab Test Results
Testing Lab: Burlington, 777 Chrysler Drive, Burlington, WA, 98233
General Remarks
Site improvement, stair rail foundation wall
As a mutual protection to clients, the public and ourselves, all reports are submitted as the confidential property of clients, and
authorization for publication of statements, conclusions or extracts from or regarding our reports is reserved pending our written
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Client:
Renton School District No. 403
Renton, WA 98057
300 SW 7th St
Project:
Lindbergh High School Field Improvements
25B121-01 (Bldg Permit: B25002218)
Renton, WA 98059
16426 128th Avenue Southeast
Compressive Strength of Concrete
Test Method: ASTM C 39
Sample: 5200
Sample 5200
Report #: CC-000007-01
Burlington
777 Chrysler Drive
Burlington, WA 98233
Phone: (360) 755-1990
Report Date: 11/05/2025 15:41