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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The faster, 123501- way to work with standards. By continuing to use this website, you agree to their use. Metallic, Frustum of a cone Alternative 123501 are allowed if requirements are met comparability tests Tamping Rod Round, straight steel rod, length mm and diameter 16mm Tamping end rounded to a hemispherical tip Measuring Device Ruler Marked in increments of 5 mm or smaller Length of at least mm In addition, a scoop is needed.
BS EN 12350-1/BS EN 12350-2/BS EN 12390-2/BS EN 12390-2
Depending on the consistency of the concrete and the method of eb, moulds shall be filled in one or more layers to achieve full compaction. Your Alert Profile lists the documents that will be monitored. Take the scoopfuls of concrete through the moving stream from the truck mixer.
If a falling away or shearing occurs, disregard test and make a new test using another portion of the sample. After compaction of each layer, tap the sides of the container smartly with the mallet until large bubbles ba air cease to appear on the surface and depressions left by the compacting rod or bar, are removed.
Contents of BS EN Records shall be kept to ensure the ns of the specimen from sampling to 1350-1. Procedure Place the TMD in the concrete so that the sensing portion is submerged a minimum of 75 mm. Rod the bottom layer throughout its depth. Rod the second and top layers throughout their depth, so that the strokes just penetrate into the immediately underlying layer.
Both parties will agree to the specific time limit as substantiated from the concrete design mix. Frequency shall be at least vibrations per minute The diameter of the internal vibrator not exceeding one-quarter of the smallest dimension of the test specimen Vibrating table with a minimum frequency of 40 Hz 2 cycles per minute Compacting rod or bar Preparation and filling of the moulds Before filling the mould, cover the inner surface ba the mould with a thin film non-reactive release material to prevent the concrete from adhering to the mould.
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BS EN 12350-1:2009
Half of the strokes near perimeter, and then progressing with vertical strokes spirally toward the center. You may experience issues viewing this site in Internet Explorer 9, 10 or 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. Concrete cubes at the site Marking 123350-1 test specimens shall be marked clearly and indelibly, without damaging the specimen using a cub tag that contains the information related to the specimen Casting date, ticket number, specimen ID, location of sampling….
A sample of concrete is placed in a mold, shaped as the frustum of a cone, and compacted. This European Standard specifies two procedures for sampling fresh concrete, by composite sampling and by spot sampling. You may find similar items within these 123501 by selecting from the choices below:. Take the scoopfuls of concrete through the moving stream from truck mixer.
Find Similar Items This product falls into the following categories. Thank you for another wonderful post. Where required, the specification of a maximum time between 1350-1 layers of concrete should take account of the likely temperature of the concrete, cement type, mix proportions, 12350-11 use of admixtures with set retarding properties and consistency of the concrete.
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Ways of how the sample shall be vibrated: Compacting by hand with compacting rod or bar Distribute the strokes in a uniform manner over the cross-section of the mould. Avoid over-vibration, which may cause loss of entrained air.
The most common method used in the sampling for casting with large volume of concrete is the spot sampling which is less time intensive due to the rate of pouring. Minimum size of sample x 1. Leave a Reply Cancel reply Enter your comment here Record the date and time of sampling.
Significance and Use The slump test was originally developed to provide a technique een monitor the consistency of unhardened concrete.
BS EN – Testing fresh concrete. Sampling – BSI British Standards
Protect the sample from sun, wind, and other sources of rapid evaporation, and from contamination. The report shall include: Document Status Indicators The Green document status 112350-1 indicates that the eb is: Their committees work with the manufacturing 12530-1 service industries, government, businesses and consumers to facilitate the production of British, European and International standards.
Foreword Scope Normative references Terms and definitions Apparatus Sampling 1350-1 of sampling See more standards on testing concrete. 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, without excessive segregation.
Notify me of new comments via email. Take the smart route to manage medical device compliance. It depends upon the project specifications on particular project area of jurisdiction. Mechanical vibration using Compacting with an internal vibrator Apply the vibration for the minimum duration necessary to 21350-1 full compaction of the concrete. Plastic concrete slump greater than 10 mm and less than mm. Fill the mold in three layers of approximately equal height. After this, the design mix specific to the particular type of structure recommends the discharge time limit waived against what is stated in the specifications.
Standards Subsctiption may be the perfect solution. Transport of test specimens Avoid loss of moisture and deviations from the required temperature at all stages of transport.
NOTE The requirement for remixing the sample before tests on the fresh concrete, or before making test specimens, is included in the relevant standards. Move the scoop around the perimeter of the mold to ensure even distribution of material and minimize segregation. 123501 that the compacting rod, or bar, does not forcibly strike the bottom of the mould when compacting the first layer, nor penetrate significantly any previous layer. When mixing and sampling of concrete is done in a laboratory, different procedures may be required.