Open the petcocks on your air meter by pushing the levers into an upright position. Make sure you have an air tight seal or the results of your test will be invalid. Some concrete suppliers may give out the aggregate correction factor for each mix design they offer. This is the apparent air content.
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Before you put the cover on, you will screw a straight tube into the bottom of one of the petcocks and a j-shaped tube into the top of that petcock.
This is feature allows you to search the site. To do it, you will need to run an air test on a sample of fine and coarse aggregate in the same proportions and moisture condition as the concrete sample under test.
Aggregate Correction Factor For every air test you do, you will need to account for the amount of air that is stored in the voids of the aggregate. Combining values from the two systems may result in non-conformance with the standard. In the meter you have a known volume of air at a known pressure in a sealed air pot asfm an f231 volume of air being contained inside the sample of wet concrete.
ASTM C Procedure Wipe down the inside and rim of the measuring bowl and the asstm with a wet rag to ensure that the pressure meter seals correctly when it is closed. Please choose which areas of our service you consent to our doing so. This is an ad network. This supports the Maven widget and wstm functionality.
ASTM C231: Testing Air Content of Concrete With a Type B Pressure Meter
First, calculate the mass of fine aggregate, Fs, and the mass of coarse aggregate, Cs. Must have a smooth hemispherical tip and be between 4 and 24 inches longer than the measuring bowl. This atm allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. The bottom layer will be penetrated to the bottom.
Scoop — needs to be large enough to get a representative sample qstm concrete and small enough not to spill concrete during placement in the measuring bowl.
Common problems with air meters include: Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
ASTM C Testing Air Content of Concrete With a Type B Pressure Meter | Owlcation
Space out your blows over the surface of each layer, and know that each blow should penetrate the previous ast, by about an inch. No data is shared with Facebook unless you engage with this feature. This is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared unless you engage with this feature. Lightly tap the side of the gauge with your finger and the side of awtm measuring bowl with your mallet until the pressure stabilizes.
Clean off the edges of the rim of the measuring bowl, then clamp down the cover of the air meter. After each layer is done, strike it times with a mallet to get rid of air bubbles that could overinflate your air content value.
ASTM C231 – Air Content by Pressure Method
We partner with Say Media to deliver ad campaigns on our sites. Some concrete suppliers may give out the aggregate correction factor for each mix design they offer. Open the petcocks on your air meter by c2231 the levers into an upright position. Comments are not for promoting your articles or other sites.
Other product and company names shown may be trademarks of their respective owners. Lightweight concrete is done with the volumetric method because the aggregate is too porous and the test results will be thrown off with so much entrapped air. Work Item s - proposed revisions of this standard. This test is typically performed in laboratory conditions but may occasionally be performed out in the field. Link to Active This link will f231 route to the current Active version of the standard.
These notes and footnotes excluding those in tables and figures shall not be considered as requirements of this standard.