ASTM C33 Method for Standard Specification for Concrete Aggregates

ASTM C33 Method for Standard Specification for Concrete Aggregates

ASTM C33 Method determines fine and coarse aggregate use in concrete. Fine aggregate consists of natural sand, manufactured sand, or a combination of both, and it is also free of dangerous amounts of organic impurities. Coarse aggregate consists of gravel, crushed gravel, crushed stone, air-cooled blast furnace slag, crushed hydraulic-cement concrete, or a combination thereof, conforming to the requirements of this specification.

    Scope:

    ASTM C33 Method determines the requirements for grading and quality of fine and coarse aggregate (other than lightweight or heavyweight aggregate) for use in concrete Fine and coarse aggregate use in concrete that will be subject to wetting, extended exposure to the humid atmosphere or contact with the moist ground shall not contain any materials that are deleteriously reactive with the alkalis in the cement in an amount sufficient to cause excessive expansion of mortar or concrete.

    Test Procedure:

    The sampling and test methods are done with grading and fineness modulus test, organic impurities test, effect of organic impurities on strength test, soundness test, clay lumps and friable particles test, coal and lignite test, bulk density of slag test, abrasion of coarse aggregate test, reactive aggregate test, freezing and thawing test, and chert test method. Independent test specimens are used to determine all other tests and evaluate potential alkali reactivity where required.

    Specimen size:

    Sample material (contains fine and coarse aggregate) finer than 75-μm (No. 200) sieve

    Data:

    The fine and coarse aggregate is not prohibited when used with cement containing less than 0.60% alkalies calculated as sodium oxide equivalent (Na2O + 0.658K2O)

    Conclusion:

    ASTM C33 gives the detailed specification and requirements for grading and quality of fine and coarse aggregate for use in concrete.

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