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Standard ASTM C138/C138M-24a 1.7.2024 preview

ASTM C138/C138M-24a

Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete (Includes all amendments and changes 8/6/2024).

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STANDARD published on 1.7.2024


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The information about the standard:

Designation standards: ASTM C138/C138M-24a
Publication date standards: 1.7.2024
SKU: NS-1194060
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Concrete and concrete products

Annotation of standard text ASTM C138/C138M-24a :

This test method covers determination of the density of freshly mixed concrete and gives formulas for calculating the unit weight, yield or relative yield, cement content, and air content of the concrete. Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials. The test method shall use the following apparatuses: balance or scale; tamping rod, which is a round straight steel rod having the tamping end rounded to a hemispherical tip; internal vibrator which may have rigid of flexible shafts, preferably powered by electric motors; measure, which is a cylindrical container made of steel or other suitable metal specified herein; strike-off plate; mallet; and scoop of a size large enough so each amount of concrete obtained from the sampling receptacle is representative and small enough so it is not spilled during placement in the measure.


Keywords:
air content, cement content, concrete, relative yield, unit weight, yield ,, ICS Number Code 91.100.30 (Concrete and concrete products)

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