Strength tests

Three servo-hydraulic testing machines are available for mechanical tests with capacities in compression ranging from 200 kN to 5 MN. They are equipped also for uniaxile tension and for rupture tests. Additionally, they are equipped for rupture tests as well. Two further very versatile servo electrical universal testing frames with maximum loads of 5 kN and 50 kN complete the equipment. The smaller frame is especially equipped for testing elastomers with a large displacement measuring device MFN-A 4/500 mm ranging from 4 to 500 mm with a high resolution and hydraulic clamps for secure fixture of the specimens.

Figure: Cracked steel fiber reinforced concrete bar after a rupture test

Tests under sustained loads

Three test rigs are capable of running tests under sustained loads independently in a climate room with three specimens at a time. The rigs permit the observation of creep behavior of various conctruction materials.

Weight loss due to drying and the resulting shrinkage are measured simultaneously on corresponding unloaded sprecimens.

Figure: Creep test with three concrete specimens in a rig for tests under sustained loads