GeoTesting Express is a provider of Rock Testing Services – ASTM D, Standard Test Method for Determination of Rock Hardness by Rebound Hammer . ASTM D Related standards: C, D, D, D, D, D, D Standard Test Method for Determination of Rock Hardness by Rebound. ASTM D Standard Test Method for Determination of Rock Hardness by Rebound Hammer Method. standard by ASTM International.
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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. For a given plunger tip diameter and radius of curvature, the impact energy of the rebound hammer determines its range of applicability.
Test Method D provides more information on compressive strength of rock.
ASTM D – 05 Standard Test Method for Determination of Rock Hardness by Rebound Hammer Method
Agencies that meet the criteria of Practice Aastm are generally considered capable of competent and objective testing and sampling. Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results. 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. Hammers with energies above 0.
No other units of measurement are included in this standard. For the same rock or material, rebound numbers obtained from different hammers are not comparable.
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This test method applies only to hammers with an impact energy not to exceed 0. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Care should be taken when testing such rocks and conglomerates as the ashm values will vary between testing a large piece of aggregate versus softer matrix of the conglomerate. Earlier recommendations for rock mechanics applications were only for hammers with an impact energy of 0.
Reliable results depend on many factors; Practice D provides a means awtm evaluating some of those factors. Link to Active This link will always route to the current Active version of the standard.
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 ast facilities used.
Accordingly, this limitation should be kept in mind when selecting a hammer type. Work Item s – proposed revisions of this standard.
In asym, 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.
Historical Version s – view previous versions of standard. Note 1 — Several types of rebound hammers are commercially available to accommodate testing of various sizes and types of rock.