BS EN +A Licensed to Mr George Calvar on 26 May 1 user personal license only. Copying, copy/pasting, storage & distribution or use. BS EN BS EN , incorporating amendment no. 1. BS EN +A, incorporating Corrigendum May BS EN . Specifies reference procedures, and in certain cases an alternative method, for the chemical analysis of aggregates. Document History. Supersedes BS EN.
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NOTE 1 If the aggregate contains non-volatile oxidizable constituents, as in the case of blast-furnace slags, the loss on ignition should be corrected in accordance with EN If it is not clear, start the test again using a new test portion.
Dry and then cool the Erlenmeyer flasks, filter funnels, filter papers, and their contents to constant mass 3. If necessary, allow them to cool. NOTE Organic contaminators can entrain air in mortar mixes.
NOTE The value of factor k for the solution should be fn using the mean value of three determinations, expressed to three decimal places. Repeat the procedure until all of the floating particles have been collected in the sieve. For dated references, only the edition cited applies.
Sieve the dried particles on a 4 mm sieve 5.
Supersedes BS EN NOTE If only a small furnace is available, each test portion can be divided into two or more parts.
Allow the crucible 11744-1 its contents to cool to the room temperature in a desiccator. Weigh two ml Erlenmeyer flasks 5. Allow to settle until the supernatant water is more or less clear. Repeat the procedure with the extract from the second test specimen. Reduce the laboratory sample hs the procedures specified in EN to an amount not less than the mass specified in Table 1 7.
While stirring vigorously and maintaining the solution at boiling point, add drop-by-drop 5 ml of the barium chloride solution 4. Leave the solution to cool to room temperature and store in a glass bottle 5.
BS EN +A – Tests for chemical properties of aggregates. Chemical analysis
Reject the trial mixes. NOTE 2 1,5 g of silicone oil is sufficient for the batch of 1,5 kg of beads. Standardize the solution at weekly intervals, or before use if the tests are less frequent. Table 2 — Proportions of mass per grain size class Sizes Percentage mm in mass 0 to 0,5 15 0,5 to 2 15 2 to 5,6 20 5,6 to 8 10 8 to 11,2 11 11,2 to 16 14 16 to 22 15 Total NOTE 1 if there are great differences in the particle densities hs the individual grain size classes, the mineral mixture e be combined using proportion of volume.
NOTE 2 Control mixes will usually be prepared a day after the test mixes. NOTE With some aggregates, e. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.
Filter 75 ml of the solution from the flask into a bx glass ml graduated cylinder 5. Stopper the 11744-1 and mix the contents by shaking 5. Complete this part of the procedure within 60 s. Bring to the boil and boil for 5 min. Record the volume V6 of the thiocyanate solution added.
The chloride ion concentration may also be determined using instrumental methods based on conductivity. If further particles float on the solution, decant through the sieve again. To each flask, add a mass of water equal fifty times the mass of the test specimen. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of the product named.
After extraction, the recovered filler eh dried and weighed. Fulvo acids dissolve in hydrochloric acid producing a yellow colour. Gently agitate the floating particles with the glass rod to dislodge any air bubbles that may have caused heavier aggregate particles to float. While maintaining the solution at boiling point and stirring vigorously, add drop-by-drop 10 ml of the barium chloride solution 4. After drying, the absence of free lime is confirmed by comparison between the analysis of the hydrated samples and the calibration curve of free lime.
Determination of particle size distribution — Test sieves, nominal size of apertures ENMethods of test for mortar for masonry — Part 4: Disperse the mixture in 50 ml of demineralized bx.
Vigorously shake the test tube for 10 s and read the spectrophotometer result. 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 ne be out of date as it is no longer being maintained by the editorial teams at NBS.
If the difference between two determinations is more than twice the repeatability standard deviation, repeat the test and take the mean of the two closest values.
BS EN 1744-1:2009+A1:2012
Use a 10 ml graduated cylinder 5. Method for determination of acid-soluble material in fine aggregate Superseded but remains current. Transfer the settled aggregate from the extraction bottle, with the aid of a minimum amount of water, to a pre-weighed porcelain evaporating basin 5.
Then dynamically compact the dry specimen on the vibrating table 5. Take the smart route to manage medical device compliance.