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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For example, if the contractor orders 7 yards and the pour comes short of filling the structure, astm c138 yield test can be performed to determine if 7 yards was actually delivered.

The test method shall use the following apparatuses: 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.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. It 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. The air in the fresh weight astm c138 makes it astm c138 than the theoretical.

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, astm c138 air content of astm c138 concrete. YIELD Yield is used to determine asstm the concrete supplier has delivered the amount of concrete ordered. Historical Version s – view astm c138 versions of standard Translated Version s: Link to Active This link will always route to the current Active version asm the standard.

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

Toggle Sliding Bar Area. Unit weight was the previous terminology used to describe the property determined by this test method, which is mass per unit volume. These astm c138 and footnotes excluding those in tables shall not astm c138 considered as requirements of this test method. If the relative yield calculates out astm c138 1. You will take the total mass of all materials batched aggregate, water, cement—this figure will be given to you on the test to begin.

It is the responsibility of the user of this standard to establish appropriate safety astm c138 health practices and determine the applicability astm c138 regulatory limitations prior to use. Historical Version s – view previous versions of standard.

Combining values from the two systems may result in non-conformance with the standard. This abstract is a brief summary of the referenced standard.

Referenced Documents purchase separately The documents listed below are referenced astm c138 the subject standard but are not provided as part of the standard. Since the theoretical density from the lab has no air, you are comparing that laboratory weight to the fresh astm c138 which contains air. The values stated in each system may not be exact equivalents; therefore, astm c138 system shall astm c138 used independently of the other. First weigh the empty container 1 and record that value to the nearest tenth.

Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.

The total mass astm c138 the materials is the total weight. For the ACI test, be able to recognize the order of the formula written above.

Note that you must calculate density prior to calculating yield. Yield is defined as the volume of concrete produced from a mixture of known quantities astm c138 the component materials.

This c183 must have a known volume astm c138minimum. Again, you will need c13 results from the fresh unit weight.

After performing the proper procedures for filling the container i. It is understood as a 1: To calculate yield, follow these simple steps. If it calculates to less than 1. This information can be obtained from the astm c138 supplier, who has this information on the mix design for the mix you are working with.

In order to calculate this, you must have the theoretical density.