BS EN 12350-1 PDF
Buy BS EN TESTING FRESH CONCRETE – PART 1: SAMPLING from SAI Global. said in BS EN , take a few samples throughout the pour for the best representation of the batch and make sure you take % of what you think you’ll . This British Standard specifies two procedures for sampling fresh concrete which are implemented by composite sampling and by spot.
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Thank you for another wonderful post. Please first log in with a verified email before subscribing to alerts. Document Status Indicators The Green document status indicator indicates that the document is: Quantity at least 1. Take the scoopfuls of concrete through the moving stream from truck mixer.
BS EN – Testing fresh concrete. Sampling – BSI British Standards
After this, the design mix specific to the particular type of structure recommends the discharge time limit waived against what is ns in the specifications. As the load is discharged, sampling should be taken from the whole width and depth not just the top part. Record the date and time of sampling. Learn more about the cookies we use and how to change your settings.
Full compaction is achieved using mechanical vibration, when there no further appearance of large air bubbles on the surface of the concrete and the surface becomes relatively smooth with a glazed appearance, 122350-1 excessive segregation. Apparatus Container, large enough to provide at least 75 mm of concrete in all directions around the sensor of the temperature measuring device, or at least three times the NMAS Nominal Maximum Aggregate Sizewhichever is greater.
It depends upon the project specifications on particular project area of jurisdiction. Sampling Concrete It is acceptable to measure the temperature in: Subject the concrete to a sufficient number of strokes per layer, typically Extended delays in placing can lead to a significant loss of consistency with time making it impossible to place with satisfactory compaction.
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BS EN specifies two procedures for sampling fresh concrete, by composite sampling and by spot sampling.
Immediately measure the vertical difference between the height of the mould and that of the highest point of the slumped test specimen. Notify me of new comments via email.
BS EN – Testing fresh concrete. Sampling (British Standard)
Rod the second and top layers throughout their depth, so that the strokes just penetrate into the immediately underlying layer. Again there may be more recent versions of the document. The elapsed time shall not exceed 15 min. The first bbs of thought is rather straightforward: Worldwide Standards We can source any standard from anywhere in the world. Proceed to Checkout Continue Shopping.
As the voice of the U. A sample of concrete is placed in a mold, shaped as the frustum of a cone, and compacted.
Each sample shall be accompanied by a report from the person responsible for taking the sample. Email required Address never made public. Avoid over-vibration, which may cause loss of entrained air. Disregard the first part and the last part of the load bd take at least 4 increments.
BS EN 12350-1/BS EN 12350-2/BS EN 12390-2/BS EN 12390-2
Rod the bottom layer throughout its depth. Raise the mold carefully in a vertical direction with no lateral or torsional motion Raise the mold in 2 to 5 sec. Scoopfuls are taken from 12350–1 different parts of the load to form the standard sample. This standard is not included in any packages.
BS EN 12350-1:2009
Protect the sample from sun, wind, and other sources of rapid evaporation, and from contamination. Click here to find out how to access this document.
The report shall include: Fill in your details below or click an icon to log in: I have a presentation subsequent week, and I am on the look for such info.
Materials handling, Test specimens, Sampling methods, Concretes, Samples, Cement and concrete technology.
In some big projects, imagine the time consumed to perform the composite sampling when there is a lot of concrete truck mixers in queue at the checkpoint area.