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What is a necessary property of the slump board according to specifications?

Minimum 15mm thickness

Minimum 19mm thickness

The minimum thickness of the slump board required by specifications is 19mm. This thickness is significant because it ensures the board provides enough rigidity and stability during the slump test, which evaluates the consistency of fresh concrete. A thicker board can reduce the risk of bending or warping under the weight of the concrete sample, leading to more accurate and reliable test results.

Thicker boards are less likely to flex or deform when subjected to the pressures and motions involved in the testing procedure, thus helping maintain the integrity of the sample's shape and the overall test conditions. This standard thickness is part of various specifications to ensure uniformity in testing practices across different laboratories.

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Minimum 25mm thickness

Minimum 30mm thickness

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