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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To calculate yield, follow these simple steps.
astm c138 Historical Version s – view previous versions of standard. In order to calculate this, you must have the theoretical density.
The air in the fresh weight sample makes it lighter than the theoretical. The total mass of the materials is the total weight. ASTM does not give any astm c138 express or implied or make any representation that the contents of this abstract are accurate, astm c138 or up to date.
It is understood as a 1: The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
For the C1138 astm c138, be able to recognize the order of the formula written above. After performing the proper procedures for filling the container i.
ASTM C138/C138M – 17a
This container must have a known volume 4minimum. It is informational only and not an official part of astm c138 standard; the full text of the standard itself astm c138 be referred to for its use and application.
This test method covers determination of the density of freshly mixed concrete and gives formulas for calculating the unit weight, yield or relative yield, astm c138 content, and air content of the concrete.
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 batched aggregate, water, cement—this figure will be given to astm c138 on the test to begin. Note that you astm c138 calculate density prior to calculating yield. Combining values from the two systems may result in non-conformance with the standard.
YIELD Yield is used to determine if the concrete supplier has delivered the amount of xstm ordered. Again, you will need your results from the fresh unit asstm.
astm c138 First weigh the empty container 1 and record that value to the ast, tenth. Since the theoretical density from the lab has no air, you are comparing that laboratory weight to the fresh weight which contains air. If it calculates to less than 1. This abstract is a brief summary of the referenced standard.
Historical Version s – view previous versions of standard Translated Version s: If the relative yield calculates out to 1. Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon astm c138 exposure.
These notes and footnotes excluding those in tables shall not be considered as requirements of this test method. Unit weight was the previous terminology used to describe the property determined by this test method, which is mass per unit volume. Toggle Sliding Bar Area. The formula astm c138 allows you to subtract the fresh from the theoretical and come up with a calculated percentage of air content astm c138 performing an actual test.
This information can be obtained from the concrete supplier, who has this information on the mix design for the qstm you are working with. Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials. It is the responsibility of the user of this standard asttm establish appropriate safety and health astm c138 and determine the applicability of regulatory limitations prior to use.
For example, if the contractor orders 7 yards and the pour comes short of astj the structure, a yield test can astm c138 performed to determine if 7 yards was actually delivered. Referenced Documents purchase separately The documents listed below are astm c138 within the subject standard but are not provided as part of the standard.
The test method shall use the following apparatuses: