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  • ASTM
    D6572-00 Standard Test Methods for Determining Dispersive Characteristics of Clayey Soils by the Crumb Test
    Edition: 2000
    $91.10
    Unlimited Users per year

Description of ASTM-D6572 2000

ASTM D6572-00

Historical Standard: ASTM D6572-00 Standard Test Methods for Determining Dispersive Characteristics of Clayey Soils by the Crumb Test

SUPERSEDED (see Active link, below)




ASTM D6572

1. Scope

1.1 These test methods provide a qualitative indication of the natural dispersive characteristics of clayey soils.

1.2 These test methods are not applicable for soils with less than 12 % fraction finer than 0.005 mm and with a plasticity index less than or equal to 8.

1.3 The crumb test method has some limitations in its usefulness as an indicator of dispersive clay. A dispersive soil may sometimes give a nondispersive reaction in the crumb test. Soils containing kaolinite with known field dispersion problems have shown nondispersive reactions in the crumb test (1) . However, if the crumb test indicates dispersion, the soil is probably dispersive.

1.4 Oven-dried soil should not be used to prepare crumb test specimens, as irreversible changes could occur to the soil pore-water physicochemical properties responsible for dispersion (2) .

1.5 The crumb test method, while a good quick indication of dispersive clay, should usually be run in conjunction with a pinhole test and a double hydrometer test, Test Methods D4647 and D4221, respectively.

Note 1--In some cases, the results of the pinhole, crumb, and double-hydrometer test methods may disagree. Crumb test methods are a better indicator of dispersive clays than of nondispersive clays (3) .

1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.7 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

D653 Terminology Relating to Soil, Rock, and Contained Fluids

D1193 Specification for Reagent Water

D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass

D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction

D4221 Test Method for Dispersive Characteristics of Clay Soil by Double Hydrometer

D4318 Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils

D4647 Test Method for Identification and Classification of Dispersive Clay Soils by the Pinhole Test

D6026 Practice for Using Significant Digits in Geotechnical Data

E1 Specification for ASTM Liquid-in-Glass Thermometers

E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves


Keywords

clay (dispersive); colloidal erodability; crumb test method; dispersibility; dispersion; dispersive clays; erosion;


ICS Code

ICS Number Code 13.080.20 (Physical properties of soil)


DOI: 10.1520/D6572-00

ASTM International is a member of CrossRef.


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ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.

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