DRAFT. prEN August ICS Will supersede EN English Version. Testing fresh concrete – Part 1: Sampling and common. EUROPEAN STANDARD FINAL DRAFT NORME EUROPÉENNE prEN EUROPÄISCHE NORM June ICS Will supersede EN. BS EN Testing fresh concrete. Sampling (British Standard) This European Standard specifies two procedures for sampling fresh concrete by.
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The report may include: Usually, especially for big projects where a large quantity of concrete is cast, both parties come up with the designed mix and validated through trial mixes to compensates for this particular problem.
Scope This practice 123550-1 methods for making and curing test specimens for strength tests. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Transport of test specimens Avoid loss of moisture and deviations from the required temperature at all stages of transport. Pack the hardened test specimens in wet sand or wet sawdust or wet wn wet burlapor sealed in plastic bags containing water.
Scope This standard covers the determination of the temperature of freshly mixed hydraulic-cement concrete. Marking The 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….
Self-compacting concrete – V-funnel test in preparation ; Part Depending on the consistency of the concrete and the method of compaction, moulds shall be filled in one or more layers to achieve full compaction.
Mechanical vibration using Compacting with an internal vibrator Apply the vibration for the minimum duration necessary to achieve full compaction of the concrete.
Record the date and time of sampling. Your Alert Profile lists the documents that will be monitored. Customers who bought this product also bought BS EN Please first verify your email before subscribing to alerts.
The time for this to occur depends on the concrete temperature, cement type, mix proportions, the use of admixtures with set retarding properties and consistency of the concrete. Significance and Use The slump test was originally developed to provide a technique to monitor the consistency of unhardened ne.
NOTE The requirement for remixing the sample before tests on the fresh concrete, or before making test specimens, is included in the relevant standards.
After compaction of each layer, tap the sides of the container smartly with the mallet until large bubbles of air cease to appear on the surface and depressions left by the compacting rod or bar, are removed. The report shall include: Degree of compactability; Part 5: You are commenting using 12350–1 Twitter account. Fill in your details below or click an icon to log in: The report shall include: Take precautions to avoid dry cement entering the eyes, mouth and nose whilst mixing concrete.
Add to Alert PDF. This British Standard specifies two procedures for sampling fresh concrete which are implemented by composite sampling and by spot sampling. Already Subscribed to this document. This is a very classical 1230-1 raised by many graduate dn. Materials handling, Test specimens, Sampling methods, Concretes, Samples, Cement and concrete technology. Gently press the concrete around the TMD at the surface of concrete so that the ambient temperature does not influence the reading.
Clean all the apparatus prior to use. 1230-1 standard is also available to be included in Standards Subscriptions. This European Standard specifies two procedures for sampling fresh concrete, by composite sampling and by spot sampling.
It may be used to verify conformance to a specified requirement for the temperature of concrete. Record the temperature to the nearest 112350-1. For this to occur the delay should be sufficient for the lower layer to develop an initial set or harden.
Testing fresh concrete -Part 1: Sampling | Daniel Stănică –
I have a presentation subsequent week, and I am on the look for such info. When mixing and sampling of concrete is done in a laboratory, different procedures may be required. 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 of the mould with a thin film non-reactive release material to prevent the concrete from adhering to the mould.
Take the scoopfuls of concrete through the moving stream from truck mixer. The mold is raised and the concrete allowed to subside.
BS EN 12350-1:2009
112350-1 the document is revised or amended, you will be notified by email. 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. The Location of concrete represented The Time of casting Compacting Methods Internal Vibrators that will be used should have the following specs: Compacting by hand with compacting rod or bar Distribute the strokes in a uniform manner over the cross-section of the mould.
Surface leveling Remove the excess concrete above the upper edge of the mould using the steel trowel or float 12350-11 carefully level the surface.
E worldwide for CEN national Members. Sampling Concrete It is acceptable to measure the temperature in: Help Center Find new research papers in: Thank you for another wonderful post.
BS EN – Testing fresh concrete. Sampling (British Standard)
Protect 123350-1 sample from the sun, wind, and other sources of rapid evaporation, and from contamination. Please download Chrome or Firefox or view our browser tips. When mixing and sampling of concrete is done in a laboratory, different procedures may be required.
Using the scoop take the increment s from the required part of a batch or mass of concrete.