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This Standard Reference Material (SRM) is intended for use in calibrating rheometers for measuring the rheological properties of concrete. A unit of SRM 2497 consists of two 18.9 L (5-gallons) containers labeled P and A. Container P includes Limestone (12 kg) and 4 L of corn syrup. Container A includes one plastic bag each of 1 mm beads (6 kg) and 10 mm beads (20 kg).


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National Institute of Standards and Technology

NIST provides over 1300 Standard Reference Materials® as well as articles and practice guides describing the development, analysis and use of SRMs.

NIST Standard Reference Materials are used by analytical laboratories in industry, academia and government in order to facilitate commerce and trade and to advance research and development. The SRMs are produced by the engineering laboratory, the material measurement laboratory, and the physical measurement laboratory at NIST. They are available for chemical composition, physical properties, and engineering materials.