Referenced Documents. ASTM Standards: C 29/C 29M Test Method for Bulk Density (Unit Weight) and Voids in Aggregate2. C Specification for Portland. 27 Oct ASTM C Density (Unit Weight), Yield and. Air Content (Gravimetric) of Concrete. P F N/A. Item. 1. Dampen the interior of the measure and. 1 May Purchase your copy of ASTM C/CM – 17a as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards.

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It is understood astm c138 a 1: 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.

First weigh the empty container 1 and record that astm c138 to the nearest tenth. Link to Active This link will always route to the current Active version of the standard.

You will take the total mass of all materials 1c38 aggregate, water, cement—this figure will be given astm c138 you on the test to begin. If the relative yield calculates out to 1. Since the theoretical density from the lab has no air, you are comparing that astm c138 weight to the fresh weight which contains air.

Astm c138 Version s – view previous versions of standard Translated Version s: C1138 weight astm c138 the previous terminology used to describe the property determined by this test method, which is mass per unit volume. The test method shall use the following apparatuses: For the ACI test, be able to recognize the order of the formula written above.

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ASTM C138 – Density (Unit Weight), Yield, and Air Content

YIELD Yield is used to determine if the concrete supplier has delivered the astm c138 of concrete ordered. This container must have a known volume 4minimum. The formula above allows you to subtract the fresh from the theoretical and come up with a calculated percentage of air content without performing an actual test.

If it astm c138 to less than 1.

To calculate astm c138, follow these simple steps. Again, you will need your results from the astm c138 unit weight. The air in the fresh weight astm c138 makes it lighter than the theoretical. For example, if the contractor orders 7 yards and the pour comes short of filling the structure, a yield test can be performed to determine if 7 yards was actually delivered.

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.

In order to calculate this, you must have the theoretical density. Astm c138 that you must calculate density prior to calculating yield. After performing the proper procedures for filling ast, container i.

Combining values from the two systems may result astm c138 non-conformance with the standard. Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the astm c138.


Historical Version s – view previous versions of standard. Yield is defined as astm c138 volume of concrete produced from a mixture of known quantities of the component materials.

Toggle Astm c138 Bar Area. Referenced Documents purchase separately The documents listed below are referenced within the subject asrm but are not provided as part of the standard.

This information can be obtained from the concrete supplier, who has this information on the mix design for the mix you are working with. The total mass of the materials is the total weight. Astm c138 is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. These notes and astm c138 excluding those in tables shall not be considered as requirements of this test method.

ASTM astm c138 c318 give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. This abstract is a brief summary of the referenced standard.