CRM116/BCR116 is a limestone supplied by the EU Institute for Reference Materials and Measurements, for which there already exists calibration data for shear testing. Test protocols and acceptable results ranges for dynamic, shear, and bulk property measurement (compressibility and permeability) have now also been established. Testing the performance of the FT4 is simply a matter of running the automated test sequence and comparing the data generated.
The CRM116 limestone is a cohesive powder with a mean diameter of about four microns. Although normally available in three kilogram batches, Freeman Technology will supply much smaller aliquots for routine calibration. For more information, visit www.freemantech.co.uk.