A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other.

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A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other.

Combiningvalues from the two systems may result in non-conformancewith the standard. See 9. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.

Referenced Documents2. Significance and Use4. Thistest method also provides one element in comparing stones ofthe same type. This apparatus consists essentially of a power-drivengrinding lap, A, 10 in. The guide rings,D, are clamped in position slightly above the specimen holders,and the g weight bearing on the specimen is the combinedweight of the specimen holder, vertical shaft above with theattached spur gear, and a weight hopper, E, containing addi-tional adjustment weights.

The frame, F, carrying the guiderings is adjustable vertically to accommodate different speci-men thicknesses. Gears, C, are adjusted on the shafts for eachspecimen thickness, so that they are slightly above the plate, G,throughout the test. It shall be ofsufficient size to permit the preparation of at least three testspecimens, and one face should have the finish to be exposedto traffic. The sample preferably should be 1 in.

Test Specimens7. Current edition approved May 1, Published July Originally approvedin Last previous edition approved in as C— DOI: United States1FIG.

At the 46th, 47th, and48th hour, weigh the specimens to ensure that the weight is thesame. If the weight continues to drop, continue to dry thespecimens until there are three successive hourly readings withthe same weight. After removing the specimens from the oven,cool them to room temperature in a desiccator before testingthem. Remove the specimens from theapparatus, brush them free of dust, and weigh to the sameprecision as for the original weights. Weigh thespecimens in water and calculate the bulk specific gravity asdescribed in Test Methods C NOTE 2—Humidity affects the results to some extent in that the rate ofgrinding is higher for higher humidity.

Preliminary assessments indicate Havaluesestablished by Test Method C appear to be similar to values producedby Test Method C, however more data are currently being studied bySubcommittee C NOTE 4—The abrasive hardness value, Ha, is the reciprocal of thevolume of material abraded multiplied by ten. The superimposed weighton the specimen is g and this is augmented by the weight of thespecimen itself.

The correction for the weight of the specimen, included inthe formula, is based on the fact that the rate of abrasion is directlyproportional to the weight.

By basing the abrasive resistance values on thevolumes, rather than the weights abraded, a better comparison is obtainedfor materials that vary considerably in bulk density. The report shall identify the type andgrade of stone, its source, and the approximate date of removalfrom the quarry. Precision and Bias A precision section will beadded when sufficient data are available to indicate acceptabletolerances in repeatability and reproducibility.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.

Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.


ASTM C241/C241M:15

Kazir Specific gravity and air, density can be determined by comparing the dry buoyant and saturated weight obtained in air. The load is applied at the quarter point of these compressive strength of the tested sample can be specimens. At higher loads the effect of hardness is more porosity. This load is increased continuously until these calculated by dividing the maximum applied load to the samples get fractured.


ASTM International Standards

View our list of current requirements.. The American Society for Testing and Materials International ASTM , founded in , is a not-for-profit organization that provides a global forum for the development and publication of voluntary consensus standards for materials, products, systems, and services. Over 30, individuals from nations are the members of ASTM International, who are producers, users, consumers, and general interest parties such as government representatives and academicians. Committees are established which focus on and have jurisdiction over standards for different designations, such as Dimensional Stone Committee C18 or Cement Committee C For example, one subcommittee may deal with the development of standards dealing with Test Methods of Dimensional Stone, and another with Anchorage Components and Systems for Natural Stone. These committees meet on a regular basis to discuss and present information for each new or existing standard.

6ES7 235-0KD22-0XA0 PDF


There are no well- were crushed in the form of fine powder and g was established correlation between the hardness and wear of taken for analysis. Resistance of stone subjected to foot Archard. The further the line is away from the points, the applications as the difference between their Ha value is less it is able to explain. The rock solidifies during this transformation process and becomes much more solid and transparent than the original sediment. By knowing the abrasion resistance value, the architects, designers and industrialists take the advantage in deciding which marble could be used in specific applications and can suggest them to the customers according to their specific requirements.



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