NORME EUROPÉENNE. EUROPÄISCHE NORM. EN April ICS English version. Armourstone – Part 2: Test methods. Standard Swedish standard · SS-EN Armourstone – Part 2: Test methods. Status: Valid. Buy this standard. Price: 1 SEK. PDF. Add to cart. The European Standard EN has the status of a Swedish Standard. This document contains the official English version of EN.
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Identification of the sample: Again there may be more recent versions of the document. NOTE It is preferable that armourstone should be sampled at the quarry or during the loading for transport or unloading. The number of pieces of armourstone in a test portion shall be as specified in Table 2.
Sampling increments shall be taken from across the pile by removing, at random or at equally distributed locations, adequate quantities of material whilst avoiding the possibly segregated material at the start and finish of the pile see Figure 1.
Calculate, to the nearest whole number, the cumulative percentage of pieces of armourstone Pn with a mass smaller than each specified mass in the mass distribution in accordance with the following formula: NOTE Formation of open cracks or opening of existing discontinuities can more objectively be determined by measuring the velocity of acoustic waves through the test portion before and after freezing and thawing also see EN Place the mm sieve over the stones retained on the mm sieve.
Examine the test portion visually and note any open cracks or other signs of disintegration. When one load contains insufficient material for one sample to be tested several loads shall be taken. Determination of the water content by drying in a ventilated oven ISOTest sieves — Technical requirements and testing — Part 2: During sampling, grabs or other extraction equipment shall be filled to a minimum such that the degree of filling does not adversely affect the representative nature of the sample or sampling increment.
BSI is incorporated by Royal Charter. Where segregation is present in one direction of the deposited sample, place the wires in the same direction see Figure 3 and take the subsample by removing all stones located, or for the largest part located, between the imaginary vertical planes projected by the wires. Weigh and record the test portion mass, in grams, as m1.
PN-EN – Google Books
This designation accepts the presence of undersize and oversize pieces of armourstone. A manual method of control may be used, provided 13338-2 correct cooling curve, as shown in Figure 5, is adhered to. Signature s of sampler s: Cut the piece of armourstone to give two sawn test portions, and mark each for identification.
The distance between two parallel set plates shall be at least three times the sieve size of the nominal upper grading limit. A sample increment shall be taken by catching the discharge stream in a loader bucket, making sure that the complete cross-section of the stream of material is intercepted.
For other purposes, in particular factory production control, other methods may be used provided that an appropriate working relationship with the test method has been established.
NBN EN 13383-2
Reference to sampling plan used: Skip to main content. Test laboratories 133832 determine the time required to achieve constant mass for specific types and sizes of sample dependent upon the drying capacity of the 1333-2 used. Sampling increments should be taken at regular intervals throughout the period the batch is in motion. Sampling method used see Clause 4: The Red document status indicator indicates that the document is an old version The document has likely been withdrawn by the publisher, also the meta data presented here may be out of date as it is no longer being maintained by the editorial teams at NBS.
This does not preclude the free use, in the 133383-2 of implementing the standard, of necessary details such as symbols, and size, type or grade designations.
A list of organizations represented on this committee can be obtained on request to its secretary. The selection of the 1333-2 scheme will depend on the relative size of the unloading equipment and the floating equipment. NOTE For guidance on numbers and sizes of samples and test portions for testing armourstone as specified in EN Click to learn more.
The volume, for various moisture conditions, is determined from the mass of the water displaced, by weight reduction in a wire-basket. The crushing shall be carried out with a laboratory jaw crusher. NOTE The testing of water eh is the first stage in the determination of the resistance to freezing and thawing of armourstone.
NOTE The required number of sampling locations will depend on the length of the hold of the floating equipment. Number of pieces of armourstone: When reducing a sample already discharged onto a floor area 4.
For this purpose, the contents of one or more loader buckets, grabs, lorries or any other 13338-2 of handling or transport shall be taken. The sampling shall be carried out at intervals of 10 m along the length of the hold of rn floating equipment. Perforated steel plate sieves shall be in accordance with EN Any interruption should not exceed 72 h.
However, several such test portions can be tested at the same time and share both an oven and low temperature cabinet.
Sampling variation caused by the heterogeneity of the batch shall be reduced to an acceptable level by taking an adequate number of sampling increments.
NOTE For armourstone both sampling and preparation are to some extent dependent on the mass of the piece of armourstone selected for the test. Take the material in strips over the full width of the pile or in equal numbers of half strips from the left and right hand side of the centre line of the pile.
Each piece 13383-2 armourstone shall be marked clearly and durably with the allocated number.