EN 13383-2 PDF
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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For further information on grading, see EN Three groups are recognised, see Table 3. For example, if sampling increments are taken from armourstone discharged from a silo, the samples represent the armourstone that has been discharged, not the armourstone remaining in the silo.
The selection of the sampling scheme will depend on the relative size of the unloading equipment and the floating equipment. For heavy gradings, the sampling increment may well be a single piece of armourstone and in this case considerably more than 6 sampling increments will be needed to meet the requirements of Table 1 below.
The specimen of g to g for testing water absorption shall 13383–2 removed from the laboratory sample by sawing or drilling. The test portion shall consist of one piece of armourstone or part thereof without open visible cracks.
Estimate the mass of the heaviest piece of armourstone in the sample, mmax. Alternatively, for mm, 90 mm and 63 mm square openings, perforated steel plate sieves. Users are responsible for its correct application. Sampling increments consisting of individual pieces of armourstone shall be taken from the batch to be tested and may be taken from the samples sn have been taken for the determination of the particle size or mass distribution. The distance between the cross-sections shall be determined by the required quantity of the sampling increment.
Where the 1333-2 portion for water absorption is larger than the remaining part of the laboratory sample it shall be used as the freeze-thaw portion.
Determine the percentage by weight associated with each characteristic mass as follows: The sampler shall be informed of the aim of the sampling. When sampling from a non-segregated stockpile, a sampling increment shall be taken as indicated for a segregated stockpile or by taking a quantity of material from a random location which is easily reached with the equipment available. To facilitate the reduction procedure a sample to be reduced by using wires eh be spread in a layer of thickness not greater than twice the nominal upper size of the material.
The period during which the sampling is done shall be divided into a number of equal intervals and a sampling increment shall be taken in the middle of each interval. The sampling increments shall be spaced at approximately equal intervals, adjusted to take account of the required number of samples for the load to be sampled.
If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. Method of sample reduction: 133383-2 the cumulative percentage mass passing each sieve Pi from the following formula: Identification of the sample: The number of pieces of armourstone heavier than fragments in the test portion em heavy and light gradings shall be as specified in Table 1.
The distance between test portion and the sidewalls of the cabinet, shall not be less than 50 mm. Cut the piece of armourstone to give two sawn test portions, and mark each for identification.
NBN EN 13383-2
Mark the test portion 13383- identification. Record the percentage to the nearest whole number. With a continuous process the quantity produced during an agreed period is treated as a batch.
Click to learn more. If a sampling increment of enn heavy grading is too large for the preparation of the bulk sample, the procedure as specified in 4. Examine and record crack formation. In every sampling increment all material between two cross-sections shall be taken. Second number of samples can directly be taken and sent to the laboratory together with the first number, or can be taken or sent to the laboratory if necessary depending on the test result of the first number.
Place the mm sieve over the stones retained on the mm sieve.
BS EN – Armourstone. Test methods
Any interruption should not exceed 72 h. The test method consists of soaking at atmospheric pressure and storage in water for thorough water absorption see 9.
NOTE The required number of sampling locations will depend on the length of the hold of the floating equipment. Learn more about the cookies we use and how to change your settings. Calculate the cumulative mass of pieces of armourstone including fragments Mn with a mass smaller than each specified mass in the mass distribution.
When one load contains insufficient material for one sample to be tested several loads shall be taken. Name s of persons present at time of sampling: The number of pieces of armourstone in a test portion shall be as specified in Table 2. The Amber document status indicator indicates that some caution is needed when using this document – it is either: The sampling shall be carried out at intervals of 10 m along the length of the hold of the floating equipment.
Pass the sample in successive parts over the sieves in order of increasing sieve size, starting with the 63 mm sieve up to and including the mm sieve. A comparison may be made between the test portion under test and the unboiled test portion.