Method for non-destructive, automated determination of the strength of test pieces, and test apparatus for non-destructive strength determination

摘要

Method has the following steps: test bodies are finished and stored in individual storage places under chosen conditions; each sample and location are individually identified; samples are taken from storage and tested with gross density automatically determined and recorded together with the test time; mass and dimensions are recorded together with the base resonance frequency, from which the extension and torsion resonance are determined and lastly the sample is automatically returned to its storage location. The invention also relates to a device for determination of the strength of inorganic samples and an equation for determination of the strength with corresponding constants.