The Distribution of Critical and Rupture Loads and Determination of the Factor of Crackability

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Title: The Distribution of Critical and Rupture Loads and Determination of the Factor of Crackability

Author(s): M.P. Rebic

Publication: Special Publication

Volume: 82

Issue:

Appears on pages(s): 721-730

Keywords: electric tests. acoustic emission; concretes; cracking (fracturing); measuring instruments; nondestructive tests; ultrasonic

Date: 9/1/1984

Abstract:
During the compressive loading of 20 cm and 10 cm concrete cubes, acoustic emission (AE) and the ultrasonic pulse transit time were measured. The critical load ( 6 ) at which the internal structure of the concrete the AE- 6 and 6 and 6 the factor F =6/6. i d e a l l y ductile completely brittle begins to be damaged is determined from transit-time/ 6 diagrams. The ratio between rupture load, is defined as the crackability This factor increases from zero (f o r materials) towards a value o f 1 .0 (f o r materials). From the tests described it follows that the factor has practically the same value whether from A E or ultrasonic measurements. Itit also is determined follows that the statistical distribution of the factor F is wider than the distribution of the rupture loads, which means that the start of the irreversible changes lies in a wider range of loading than the rupture load.