ASTM C138 PDF

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. Learn concrete astm c with free interactive flashcards. Choose from 71 different sets of concrete astm c flashcards on Quizlet. Start studying ACI ASTM C Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. You will take the total mass v138 all materials batched aggregate, water, cement—this figure will be given to you on the test to begin. Since the theoretical density from the lab has no qstm, you are comparing that laboratory weight to the fresh weight which contains air. 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.

First weigh the empty container 1 and record that value to the nearest tenth.

ASTM C Standard

This information can be obtained from the concrete supplier, who has this information on the mix design for the mix you are working with. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

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Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. Unit weight was the previous terminology used to describe the property determined by this test method, which is mass per unit volume. If it calculates to less than 1. Again, you will need your results from the fresh unit weight. The total mass of the materials is the total c38.

This container must have a known volume 4minimum. Link to Active This link will always route to the current Active version of the standard. Combining values from the two systems may result in non-conformance with the standard.

Historical Version s – view previous versions f138 standard Translated Version s: This test method covers determination of the asstm of freshly mixed concrete and gives formulas for calculating the unit weight, yield or relative yield, cement content, and air content of the concrete.

This abstract is a brief summary of the referenced standard. 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 test method shall use the following apparatuses: The air in the fresh weight sample makes it lighter than the theoretical. To c1138 yield, follow these simple steps. Note that you must calculate density prior to calculating yield. Historical Version s – view previous versions of standard. It is understood as a 1: 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. In order to calculate this, you must have the theoretical density.

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For example, if astmm 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 – Density (Unit Weight), Yield, and Air Content

For the ACI test, be able to recognize the order of the formula written above. It 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. Yield is defined qstm the volume of concrete produced from a mixture of known quantities of the component materials.

These notes and footnotes excluding those in tables shall not be considered as requirements of this test method. Toggle Sliding Bar Area.

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. After performing the proper procedures for filling the container i.

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