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  • ASTM
    C604-02(2012) Standard Test Method for True Specific Gravity of Refractory Materials by Gas-Comparison Pycnometer
    Edition: 2012
    $82.37
    Unlimited Users per year

Description of ASTM-C604 2012

ASTM C604 - 02(2012)

Standard Test Method for True Specific Gravity of Refractory Materials by Gas-Comparison Pycnometer

Active Standard ASTM C604 | Developed by Subcommittee: C08.03

Book of Standards Volume: 15.01




ASTM C604

Significance and Use

4.1 The true specific gravity of a material is the ratio of its true density, determined at a specific temperature, to the true density of water, determined at a specific temperature. Thus, the true specific gravity of a material is a primary property which is related to chemical and mineralogical composition.

4.2 This test method is particularly useful for hydratable materials which are not suitable for test with Test Method C135 .

4.3 For refractory raw materials and products the true specific gravity is a useful value for: classification, detecting differences in chemical composition between supposedly like samples, indicating mineralogical phases or phase changes, calculating total porosity when the bulk density is known, and for any other test method that requires this value for the calculation of results.

4.4 This test method is a primary standard method which is suitable for use in specifications, quality control, and research and development. It can also serve as a referee test method in purchasing contracts or agreements.

4.5 Fundamental assumptions inherent in this test method are the following:

4.5.1 The sample is representative of the material in general,

4.5.2 The total sample has been reduced to the particle size specified,

4.5.3 No contamination has been introduced during processing of the sample,

4.5.4 The ignition of the sample has eliminated all free or combined water without inducing sintering or alteration,

4.5.5 An inert gas (helium) has been used in the test, and

4.5.6 The test method has been conducted in a meticulous manner.

4.5.7 Deviation from any of these assumptions negates the usefulness of the results.

4.6 In interpreting the results of this test method it must be recognized that the specified sample particle size is significantly finer than specified for Test Method C135 . Even this finer particle size for the sample does not preclude the presence of some closed pores, and the amount of residual closed pores may vary between materials or even between samples of the same or like materials. The values generated by this test method may, therefore, be very close approximations rather than accurate representations of true specific gravities. Thus, comparisons of results should only be judiciously made between like materials tested by this test method or with full recognition of potentially inherent differences between the materials being compared or the test method used.

1. Scope

1.1 This test method covers the determination of the true specific gravity of solid materials, and is particularly useful for materials that easily hydrate which are not suitable for test with Test Method C135 . This test method may be used as an alternate for Test Method C135 , Test Method C128 , and Test Method C188 for determining true specific gravity.

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

1.2.1 Exception In 7.3 the equivalent SI unit is expressed in parenthesis.

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 and health practices and determine the applicability of regulatory limitations prior to use.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C128 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate

C135 Test Method for True Specific Gravity of Refractory Materials by Water Immersion

C188 Test Method for Density of Hydraulic Cement


Keywords

gas comparison pycnometer; hydratable materials; refractory materials; true specific gravity ;


ICS Code

ICS Number Code 81.080 (Refractories)


DOI: 10.1520/C0604-02R12

ASTM International is a member of CrossRef.

ASTM C604

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