ASTM C1550 Flexural Toughness of Fiber Reinforced Concrete

ASTM C1550 Flexural Toughness of Fiber Reinforced Concrete

The requirements of ASTM C1550-10a for determining flexural strength of fiber reinforced concrete (FRC) create several challenges for most standard test systems in service today.

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The requirements of ASTM C1550-10a for determining flexural strength of fiber reinforced concrete (FRC) create several challenges for most standard test systems in service today. Specifically:

Size of the specimen: With a diameter of 800 mm (31.5 in) most existing load testing frames do not have the test space width to accommodate this.
Required stiffness of the frame: The extra wide test frame, which includes all load train components, must also have low deflection under load.
Accurate specimen deflection measurement: Specimen deflection must be measured accurately, either by a fixture mounted measuring device or by the ram postion correcting for the machine compliance under load.
Complex data analysis: The standard requires a detailed analysis of the load vs. deflection data to ensure the accurate reporting of flexural toughness. With most load test systems, the required analysis involves exporting the data to a spreadsheet or other analysis tool for generating test results.

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