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Concrete Flexural Strength Test

  1.Size of concrete specimens for flexural strength test

Concrete cubic specimen: 150X150X600mm, 150X150X550mm, 100X100X400mm or others

2.    Brief introduction of concrete flexural strength test procedure

1)    Wipe  clean all testing machine bearing surfaces and remove any loose grit or  other extraneous material from the surfaces of the specimen that will  be in contact with the rollers.

2)    Place  the concrete test specimen in the testing machine, correctly centered  and with the longitudinal axis of the specimen at right angles to the  longitudinal axis of the upper and lower rollers.

3)    Select  a constant rate of stress and load to the concrete test specimen until  break. Record the maximum load indicated and report a fracture if it is  outside the loading rollers.

3.Relative test method

GB/T 50081 standard for test method of mechanical properties on ordinary concrete

ASTM E74 Practice of Calibration of Force-Measuring Instruments for Verifying the Force Indication of Testing Machine

ISO 1920-4 Testing of Concrete- Part 4: Strength of hardened concrete

ASTMC78/C78M Standard Test Method for Flexural Strength of Concrete(Using Simple Beam with Third-Point Loading)

BS EN 12390-5 Testing hardened concrete Part 5: Flexural strength of test specimens

4. Diagram of concrete flexural strength test

        center point  loading                           two point loading

               (3-point flexure)                                  (4-point flexure)

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