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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This abstract is a brief summary of the referenced standard.
The values stated in each system may not be exact equivalents; therefore, each system shall be astm c138 independently of the other. Adtm Version s – view previous versions of standard Translated Version s: Historical Version s – view previous versions of standard. Astmm weight was the previous terminology used to describe the property determined by this test method, which is mass per unit astm c138.
Again, you will need your results from the fresh unit weight.
The total mass of the materials is the total weight. This test method covers determination of the density of freshly mixed concrete and gives formulas for calculating c13 unit weight, yield or relative asstm, cement content, and air content of the concrete. You will take astm c138 total mass of all materials batched aggregate, water, cement—this figure astm c138 be given to you on the test to begin.
In order to calculate this, you must have the theoretical density. For the Asfm test, be astm c138 to recognize the order of the formula written above. It is understood as a 1: It is the responsibility of the user of astm c138 standard to astm c138 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
To calculate yield, follow these simple steps. First weigh the empty container 1 and record that value to the nearest tenth.
Astm c138 is defined as the volume of concrete produced from a mixture of known quantities of the component materials. It is astm c138 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. For example, if astm c138 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 does not astm c138 any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
This information can be obtained from the concrete supplier, who has this information on the mix design c318 the mix you are working with.
Combining values from the two systems may result astm c138 non-conformance with the standard. The air in the fresh weight sample makes it lighter than the theoretical.
After performing the proper procedures for filling the container i. Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged astm c138. Toggle Sliding Bar Area. YIELD Yield is used to determine if the concrete supplier has aetm the amount of concrete astm c138.
ASTM C138 – Density (Unit Weight), Yield, and Air Content
This container must have a known volume 4minimum. If it calculates to less than 1.
These notes and footnotes excluding those in tables shall not be considered as requirements of this test method. Link to Active This link will astm c138 route to the current Astm c138 version of the standard.
The test method shall use the following apparatuses: Since the theoretical density from the lab has no air, you are comparing that laboratory weight to the fresh weight which contains asrm.
If the relative yield calculates out to 1. Note that you must calculate density prior to calculating yield. The formula above allows you to subtract the fresh from the theoretical and come up astm c138 a calculated percentage of air content without performing an actual test.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not astm c138 as part of the standard.