Specifications for Large bed compression machine for plastic pipe.docx

This specification document outlines requirements for a large bed compression testing machine to be procured by the Illinois Department of Transportation (IDOT) Materials division. The machine is intended to replace outdated testing equipment and will be installed in a new facility to conduct material testing for plastic pipes in compliance with AASHTO M252, AASHTO M294, ASTM F949, ASTM D3034, and American Water Works Association standards. The equipment must meet Test Method ASTM D2412 and ASTM D695 requirements and be capable of testing pipe sizes ranging from 4 to 60 inches in diameter for both stiffness and flattening characteristics.

The compression testing machine must feature a constant rate-of-crosshead movement capability with a compression speed of 0.50±0.02 inches (12.5±0.5 mm) per minute for stiffness testing and segmented testing capability to increase head speed for flattening tests on single specimens. The machine specifications include a maximum frame capacity of 300 kilonewtons, crosshead speed range of 0.05 to 500 mm/min, minimum crosshead travel of 1,600 millimeters, stroke resolution of 0.001 millimeters, and load measurement accuracy of 0.5 percent of reading down to 1/1,000 of load cell capacity. The equipment must operate on standard 120-volt or 220-volt power and include accompanying software and computer systems. Loading plates must be sufficiently thick to prevent bending or deformation during testing, with length equal to or exceeding specimen length and width not less than the pipe contact width at maximum deflection plus six inches.