ASTM D5873 PDF

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Full Description 1. Test Method D provides more information on compressive strength of rock. For a given plunger tip diameter and radius of curvature, the impact energy of the rebound hammer determines its range of applicability. Accordingly, this limitation should be kept in mind when selecting a hammer type. Earlier recommendations for rock mechanics applications were only for hammers with an impact energy of 0. This test method applies only to hammers with an impact energy not to exceed 0.

Hammers with energies above 0. Care should be taken when testing such rocks and conglomerates as the rebound values will vary between testing a large piece of aggregate versus softer matrix of the conglomerate. In addition, they are representative of the significant digits that generally should be retained. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design. No other units of measurement are included in this standard.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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ASTM D5873

These applications include, for examples, the prediction of penetration rates for tunnel boring machines, determination of rock quality for construction purposes, grouping of test specimens, and prediction of hydraulic erodibility of rock. Note 1—Several types of rebound hammers are commercially available to accommodate testing of various sizes and types of rock. For the same rock or material, rebound numbers obtained from different hammers are not comparable. Note 2—The quality of the result produced by this test method is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used.

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Brabei These applications include, for examples, the prediction of penetration rates for tunnel boring machines, determination of rock quality for construction purposes, grouping of test specimens, and prediction of hydraulic erodibility of rock. Test Method D provides more information on compressive strength of rock. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results. Note 1 — Several types of rebound hammers are satm available to accommodate testing of various sizes and types of rock. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors.

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