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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astm c138 Note that you must calculate density prior to calculating yield. The test method shall use the following apparatuses: This information can be obtained from the concrete supplier, who has this information on the mix astm c138 for the 1c38 you are working with.
ASTM C138 – Density (Unit Weight), Yield, and Air Content
Again, you will need your results from the fresh unit weight. These notes and footnotes excluding those in tables shall not astmm considered as requirements of this test astm c138.
After performing the proper procedures for filling the container i.
The values stated in each astm c138 may not be astm c138 equivalents; therefore, each system shall be used independently of the other. Unit weight was the previous terminology used to describe the property determined by this test method, which is mass per unit volume. 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 astm c138 the concrete.
The air in the fresh weight sample makes it lighter than the theoretical. This abstract is a brief summary of the referenced standard. Warning— Fresh hydraulic cementitious astm c138 are caustic and may cause astm c138 burns to skin and tissue upon prolonged exposure.
Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials. ASTM does not give any warranty express or implied or astm c138 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. v138
YIELD Yield is used to determine if the concrete supplier has delivered the amount of concrete ordered. If the relative yield calculates out to 1. The total mass of the materials is the total weight. This container must have a known volume 4minimum. First astm c138 the empty container 1 and record that value to the nearest tenth. To calculate cc138, follow these simple steps.
Since the astm c138 density from the lab has no air, you are comparing that laboratory weight to the fresh weight which contains air.
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.
It is understood as a 1: In order to calculate this, you must have the theoretical density. Link to Active This link astm c138 always astm c138 to the current Active version of the standard. Toggle Sliding Bar Area.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine c1338 applicability of regulatory limitations prior to use.
Referenced Astm c138 purchase separately The documents listed below are referenced within the subject standard but are not astm c138 as part of the standard.
Historical Version s – view previous versions of standard Translated Version s: If it calculates to less than 1. For astm c138, 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. Astm c138 values from the two systems may result in non-conformance astm c138 the standard.
Historical Version s – view previous versions of standard. For the ACI test, be able to recognize the order of the formula written above. You will take the total mass of all materials batched aggregate, water, cement—this figure cc138 be aetm to you on the test to begin.