Specifications include, but are not limited to: The ND Dept. of Transportation is seeking bids for four (4) concrete compression testing machines with a minimum testing range 2,500 pounds of force to 250,000 pounds force. This specification describes a concrete compression testing machines with a rating of 250,000 pounds force for testing the compressive and flexural strength of bonded and un-bonded concrete cylinders and cores. The machine furnished to this specification shall meet or exceed the following requirements: Forney Model F-250B, Test Mark Model CM-2500, or Approved Equal FUNCTIONAL REQUIREMENTS: The machine shall: Have a load cell to measure compressive forces within the testing range and shall be calibrated and verified in accordance with ASTM latest revision. ASTM C39, “Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens” ASTM E4, “Standard Practices for Force Verification of Testing Machines” Conform to all the requirements of ASTM C39, Section 5, and “Apparatus” for digital hydraulic testing machines. Be calibrated to an accuracy within plus or minus a maximum of one percent of the indicated force, in accordance with ASTM E-4-03. 2.4. BODY AND LOAD FRAME.
