ASTM D3880/D3880M-90(2017)
Standard Test Method for Asbestos Strength Units

Standard No.
ASTM D3880/D3880M-90(2017)
Release Date
1990
Published By
American Society for Testing and Materials (ASTM)
Latest
ASTM D3880/D3880M-90(2017)
Scope

5.1 This test method facilitates the comparison of different types and grades of chrysotile asbestos by the property most pertinent to its use in asbestos-cement, namely, the strength or reinforcing value it imparts to the product.

5.2 While similar comparative results could be obtained on any given production equipment, this method allows the testing of small samples, avoids costly interruptions in production for numerous trial runs, and allows test values to be obtained by a single standard method so that results can be compared among different locations.

5.3 Strength Unit (SU) value of a fiber blend used in asbestos-cement products may be estimated by taking the proportionate SU value of each component of the fiber blend.

5.4 If the fiber blend is formulated with the aim to optimize another fiber property such as filterability, the SU calculation will assure that the blend will not fall below an acceptable strength level.

5.5 This test method is restricted to grades of asbestos used in asbestos-cement products. Very long (Group 3) fibers are difficult to evaluate by this method because the test specimens produced may not be sufficiently homogeneous. Similarly, very short (Group 7) grades may not be retained satisfactorily in the mold during the pressing of test specimens or may not provide sufficient strength to meet the test requirements.

Note 1: The term Group 3 or 7 refers to the standard designation for chrysotile asbestos grades established by the Quebec Asbestos Mining Association, See 2.2.

5.6 Because of certain differences between this method and the many variations in plant production procedure commonly used in asbestos-cement manufacture, it is emphasized that the strength values obtained by this standardized procedure will not necessarily give exactly the same strength values as obtained at any one specific manufacturing plant.

1.1 This test method gives a procedure for the evaluation of the strength-giving properties of asbestos fibers used to reinforce asbestos-cement products.

1.2 The purpose of this test method is to determine the number of strength units that may be assigned to the sample tested.

1.3 Asbestos fiber possesses the ability to impart strength to an asbestos-cement product. Every fiber grade may be regarded as possessing a certain quantity of strength-giving units. The quantity of fiber required in an asbestos-cement composition varies inversely with the number of strength units it possesses. For example, if an amount, designated by X, of a fiber possessing 100 strength units produces a product of a given strength, 2X would be required to produce a product of equivalent strength from fiber possessing only 50 strength units.

ASTM D3880/D3880M-90(2017) Referenced Document

  • ASTM C1120 Standard Test Method for Wash Test of Asbestos*， 1998-04-20 Update
  • ASTM C1121 Standard Test Method for Turner and Newall (T and N) Wet-Length Classification of Asbestos*， 1999-05-10 Update
  • ASTM C1162 Standard Test Method for Loose Density of Asbestos*， 2004-06-01 Update
  • ASTM C150 Standard Specification for Portland Cement*， 1994-03-23 Update
  • ASTM C184 Standard Test Method for Fineness of Hydraulic Cement by the 150-&#181m (No. 100) and 75-&#181m (No. 200) Sieves (Withdrawn 2002)*， 2017-08-16 Update
  • ASTM C204 Standard Test Methods for Fineness of Hydraulic Cement by Air-Permeability Apparatus
  • ASTM C430 Standard Test Method for Fineness of Hydraulic Cement by the 45-956;m (No. 325) Sieve*， 1996-04-20 Update
  • ASTM D1193 Standard Specification for Reagent Water*， 1999-04-20 Update
  • ASTM D1655 Standard Specification for Aviation Turbine Fuels
  • ASTM D2589 Standard Test Method for McNett Wet Classification of Dual Asbestos Fiber
  • ASTM D2590 Standard Test Method for Sampling Chrysotile Asbestos*， 1998-04-20 Update
  • ASTM D2946 Standard Terminology for Asbestos and Asbestos-Cement Products*， 1998-04-20 Update
  • ASTM D3639 Standard Test Method for Classification of Asbestos by Quebec Standard Test*， 1992-04-20 Update
  • ASTM D3752 Standard test method for strength of asbestos in cement bodies
  • ASTM E11 Standard Specification for Wire Cloth and Sieves for Testing Purposes*， 1995-04-20 Update

ASTM D3880/D3880M-90(2017) history

Standard Test Method for Asbestos Strength Units


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