1. Size of concrete specimens for compression strength test Concrete cubic specimen: 150X150X150mm, 100X100X100mm, 200X200X200mm Cylindrical concrete specimen: diameter 150X300mm, diameter 100X200mm, diameter 200X400mm 2. Brief introduction of concrete compressive strength test procedure 1) Placing the concrete specimen---place the test specimen on the lower bearing block. Carefully align the axis of the specimen with the center of thrust of the spherically seated block. 2) Apply the load continuously and without shock until the specimen fails and record the maximum load carried by the concrete specimen during the test. Note the type of failure and the appearance of the concrete. 3.Relative test method GB/T 50081 standard for test method of mechanical properties on ordinary concrete ASTM C39 standard test method for compressive strength of cylindrical concrete ASTM E74 practice of calibration of force-measuring instruments for verifying the force indication of testing machine 4. Specifications for concrete compressive strength testing machine Max. capacity: 3000KN( lower or higher capacity can make to order) Grade of testing machine: grade 1 Distance between upper and lower compression platen: 320mm Stroke of piston:50mm Size of upper and lower compression platen:375X375mm Weight :about 900kg
