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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When reducing a sample already discharged onto a floor area 4.
Repeat this procedure until the required size of test portion is obtained. 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.
Sampling from static batches should be avoided wherever possible since it is difficult to satisfy the principle of taking sampling increments at random from all parts of the batch, and hence segregation is likely to cause the sampling to produce biased results.
BS EN 13383-2:2013
Learn more about the cookies we use and how to change your settings. If a sampling increment of 1333-2 heavy grading is too large for the preparation of the bulk sample, the procedure as specified in 4.
The version has been reinstated.
If individual pieces of armourstone are significantly larger than the minimum size or mass required for the test s to be executed, a portion of appropriate size or mass may be obtained by breaking a representative piece.
The use of other methods not described in this standard for determining mass distribution are permitted, in particular for factory production control, provided that an appropriate working relationship with the reference method has been established.
BS EN – Armourstone. Test methods
This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. Reference to sampling plan used: Accept and continue Learn more about the cookies we use and how to change your settings. When one load contains insufficient material for one sample to be tested several loads shall be taken. Weigh and record the test portion mass, in grams, as m1. 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 Click here to sign up.
Remove any loose fragments and wash the test portion under running water to remove adhering fine particles. Em the mass of the heaviest piece of armourstone in the sample, mmax. Remember me on this computer. Mechanically selected gradings should preferably be sampled from a stationary conveyor belt or from the stream of material.
For coarse gradings the test may be performed on representative parts of sieve fractions obtained from the determination of the particle size distribution Clause 5 containing a sufficient number of armourstones. E worldwide for CEN national Members.
The distance between the cross-sections shall be determined by the required quantity of the sampling increment. NOTE It might be easier to 1383-2 each piece of armourstone of the test sample to one of the 4 categories defined by successive reference stones and, then, count the number of pieces of armourstone in between successive reference stones.
In exceptional cases, a rapid decay results in the formation of large cracks and the breaking of aggregate particles or armourstone.
Free to use BIM project management tool provides step-by-step help to define, manage and validate responsibility for information development and delivery at each stage of the asset life cycle in level 2 BIM projects. Remove the test portion from the water and immediately remove the water from its surface using a moist chamois or equivalent synthetic leather, until the surface is dull and no longer wet and shiny, and weigh the test portion M1.
The capacity of the balance shall be suitable to allow the wire basket containing the sample to be suspended and weighed in water. BSI is incorporated by Royal Charter. Depending on the source, this process might take place within months of extraction or extend over several decades.
UNE-EN escollera. Parte 2, Métodos de ensayo – Google Books
Document Status Indicators The Green document status indicator indicates that the document is: Calculate the average mass of the pieces of armourstone heavier than a fragment Mem in kilograms to the nearest 1 kg in accordance with the following formula: A manual method of control may be used, provided the correct cooling curve, as shown in Figure 5, is sn to.
If the test portion has fragmented during boiling, record the mass of the largest remaining fragment. If further reduction is required, tip the ne s containing the reduced sample over two adjoining buckets and discard the contents of one bucket.