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ASTM D7854-21

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Standard Test Method for Carbon Black-Void Volume at Mean Pressure

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1.1 This test method covers a procedure to measure a carbon black structure property by Void Volume at mean pressure. Compressed void volumes are obtained by measuring the compressed volume of a weighed sample in a cylindrical chamber as a function of pressure exerted by a movable piston. A profile of void volume as a function of pressure provides a means to assess carbon black structure at varying levels of density and aggregate reduction. For the purposes of standardized testing a single value of void volume is reported at 50 MPa mean pressure.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 The greater a carbon black resists compression by having substantial aggregate irregularity and non-sphericity, the greater the compressed volume and void volume. Also, the more that a carbon black resists compression, the greater the energy required to compress the sample per unit void volume.

5.2 Structure is a property that strongly influences the physical properties developed in carbon black-elastomer compounds for use in tires, mechanical rubber goods, and other manufactured rubber products. Structure by void volume is based on compression while structure measurements by OAN (Test Method D2414) and COAN (Test Method D3493) are based on oil absorption.

SDO ASTM: ASTM International
Document Number D7854
Publication Date June 1, 2021
Language en - English
Page Count 4
Revision Level 21
Supercedes
Committee D24.11
Publish Date Document Id Type View
June 1, 2021 D7854-21 Revision
Dec. 1, 2018 D7854-18CE01 Revision
Dec. 1, 2018 D7854-18C Revision
June 1, 2018 D7854-18B Revision
March 15, 2018 D7854-18A Revision
March 1, 2018 D7854-18 Revision
Jan. 1, 2016 D7854-16 Revision
June 1, 2015 D7854-15 Revision
Nov. 1, 2013 D7854-13 Revision