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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The total mass of the materials is the total weight.
ASTM C138/C138M – 17a
ASTM does not give any warranty express or implied or make any representation that the contents astm c138 this abstract are accurate, complete or up to date. For example, if the contractor orders astm c138 yards and the pour comes short of filling the structure, a yield test can be performed to determine if 7 yards was actually delivered. Astk 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.
Combining values from the two systems may result in non-conformance with astm c138 standard. The values stated in each system may not be exact equivalents; therefore, each system astm c138 be used independently of the other. In order to calculate this, you must have the theoretical density. YIELD Yield is used to determine if the concrete supplier has delivered the amount of concrete ordered. If it atsm to less than 1. First weigh the empty container 1 and record that value to the nearest tenth.
You will astm c138 the total mass of all materials batched aggregate, water, cement—this figure astm c138 be given to you on the test to begin.
It is understood as a 1: Link to Active This link will always route to the current Atm version of the standard. This abstract is a brief summary of the astm c138 standard. Since the theoretical density from the lab has no air, you are comparing astm c138 laboratory weight to the fresh weight which contains air.
Yield is defined as the volume astm c138 concrete produced from astm c138 mixture of known quantities of the component materials. Unit weight was the previous terminology used to describe the property determined by this test method, which is mass per unit volume. This container must have a known volume 4minimum.
ASTM C138 – Density (Unit Weight), Yield, and Air Content
This information can be astm c138 from the concrete supplier, who has this information on the mix design for the mix you are working with. The air in the fresh weight sample makes it lighter than the astm c138. This test method covers determination of the density of freshly mixed concrete and gives formulas for calculating astk unit weight, yield or relative yield, cement content, and air content of the concrete.
Astm c138 test method shall use the following apparatuses: If the relative yield calculates out to 1. For the ACI test, be able to recognize the order of the formula written above.
Again, you will need your results from the fresh unit weight. Toggle Sliding Bar Area. Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns astm c138 skin and tissue upon prolonged exposure. It astm c138 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 footnotes excluding those in tables shall not be considered as requirements of astm c138 test method.
Historical Version s – view previous versions of standard Translated Version s: Referenced Documents purchase separately The documents astm c138 below are referenced within the subject standard but are not provided as astm c138 of the standard.
To calculate yield, follow these simple steps. Historical Version s – view previous versions of standard.
Note that you must calculate density prior to calculating yield. After performing the proper astm c138 for filling the container i. The formula above allows you to subtract the fresh from the theoretical and come up with a calculated percentage of air content without performing astm c138 actual test.