Information on the most widely used ASTM standards within the materials testing industry
ASTM C1550 Flexural Toughness Testing of Fiber Reinforced Concrete
ASTM C1550 determines the flexural toughness of fiber-reinforced concrete. Flexural toughness is the maximum stress (put) onto a specimen before it cracks or breaks. In this instance it is expressed as energy absorption in the post-crack range using a round panel supported on three symmetrically arranged pivots and subjected to a central load point.
To test in accordance to ASTM C1550, the size of your specimens should have a diameter of 800 mm . This standard requires a detailed analysis of the deflection vs. load data to ensure the accurate reporting of flexural toughness.
A servo-controlled testing machine that uses the measured deflection of either the specimen or the loading actuator to control the motion of the actuator is required to produce a controlled and constant rate of increase of deflection of the specimen without requiring the intervention of an operator.
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The special fixture supporting the panel during testing includes three symmetrically arranged pivot points on a pitch circle diameter of 750 mm. The supports are capable of supporting a load of up to 100 kN (22 kip) applied vertically at the center of the specimen.
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