Specifications include, but are not limited to: An electronically controlled, automatic, portable Concrete Cylinder Compression Testing Machine that meets all requirements of ASTM C-39 and AASHTO T-22 and the following requirements. The minimum capacity shall be 350,000 lbs. force in compression. The machine must maintain accuracy of +/- 1% from 1% to 100% of the machine’s capacity. Two sets of platens shall be supplied to allow testing of both 6” X 12” and 4” X 8” cylinders using bonded or unbonded capping methods. The compression machine shall run on 110 volts, 60 Hz, single phase. The electronic control system shall be a closed-loop, microprocessor hydraulic system to monitor and control the load rate of the hydraulic system.